Laboratory Chemicals - ACS Publications - American Chemical Society

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3 Laboratory Chemicals Each chemical is followed by an alphabetical list of manufacturers or suppliers. Listings of this section begin on page 248

3

Laboratory Chemicals Classification List

Bold face listings are subdivided desiccants dyes, fluorescent

absorbents—251LG acids—251LG adsorbents, chromatography aerosol chemicals — see chemicals agricultural analysis reagents

liquefied gases—see compressed gases liquid crystals

electronic grade chemicals — see chemicals electronic grade reagents — see reagents elements—260 LG enzymes, purified

bromine compounds—252LG buffering materials — see also chemicals, pH buffers calibration gas mixtures for chromatography and other instrumental methods calibration standards—252LG calorimetric chemicals — see chemicals—252LG carbohydrates catalysts celluloses, ion exchange — see ion exchange chemicals chelating agent chemicals — see also ion exchange chemicals — 252LG compounds, deuterium compounds, high purity—260LG compressed gases, gas mixtures, and rare gases

filter gel gas absorbents — see absorbents, gas gases — .see compressed gases indicators—262LG ion exchange chemicals—262LG ion exchange crystals ion specific test papers isotopes — see chemicals isotopes, radioactive — see labeled or tagged organic compounds isotopes, stable kits, chemical reaction kits (teaching) labeled or tagged organic compounds —264LG

magnetic alloys, ultra-high purity metal foil metals, high purity — see also rare earth metals metals, refractory metals and alloys, precious microscopy reagents — see reagents, microscopy moisture determination apparatus — see chemicals, moisture determining nitrogen organic synthesis intermediates organophosph i nes powders, spectroscopic prepared standard solutions (pre­ packed) —266LG proteins radioactive chemicals — see chemical

rare earth metals and compounds — see also metals, high purity rare gases — see compressed gases reagents—266LG reagents for microcombustion and microanalysis—270LG reagents for qualitative analysis— 270LG reagents for quantitative analysis refractory metals — see metals, refractory resins scintillation chemicals — see chemicals solutions, pH buffer solvents—2 70L G sources, Mossbauer effect sources, radiochemical spectroscopic powders — see powders stains, biological standards—272LG stationary liquid phases temperature indicating markers ultraviolet chemicals — see chemicals

C ECACETYLENE DERIVATIVES HYDROCARBONS mono-alkyl, di-alkyl, di-ynes, ene-ynes, aryl, aryl-alkyl, d i a r y l , alicyclic, poly-ynes, cyclic.

ALCOHOLS alky I, ene-yne-ols, a r y l , alicyclic, diols, diyne-diols

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GUIDE

Laboratory Chemicals

ABSORBENTS chromatography Achem Div. Alltech Associates, inc. Anaiabs, Inc. Analiech, inc. Analytical Instrument Development, Inc. Antek Instruments, Inc. Apache Chemicals. Inc. J. T. Baker Chemical Co. Barnebey-Cheney Beckman instruments. Inc. Bio-Cal Instrument Co. Bic-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem Camag, Inc. Chemical Research Services, Inc. Coast Engineering Laboratory Cyclo Chemical Durrum Chemical Corp. Dynalab Corp. Eagle-Picher Industries, Inc. EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Floridm Co. The Fluorocarbon Co. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals Helena Laboratories lonac Chemical Co. Johns-Manville Kensington Scientific Corp. Laboratory Data Control Lachat Chemicals. Inc. LaPine Scientific Co. Luminon, Inc. Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists MG Scientific Gases Miles Labs., Inc., Research Div. MISCO Scientific Nutritional Biochemicals Perkin-Eimer Corp. Perkin-Elmer. Ltd. Pharmacia Fine Chemicals, Inc. Phase Separations Ltd. Phipps & Bird. Inc. Phy-Lab Polysciences, Inc. Prolabo Quantum Industries H. Reeve Angei & Co.. Inc. Regis Chemical Co. Reliable Chemical Co. Schleicher & Schuell. Inc. Scientific Manufacturing Industries Scientific Products The Separations Group Sigma Chemical Co. Supelco, Inc. Technicon Instruments Corp. Varian Instrument Div. VWR Scientific Waters Associates I nc.

electrophoresis Analabs, Inc. J. T. Baker Chemical Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Camag. Inc. Canalco. Inc. Corning Glass Works (Mass.) E-C Apparatus Corp. Fisher Scientific Co. Ge'man Instrument Co. Helena Laboratories Hyland Isolab, Inc. LaPine Scientific Co. MISCO Scientific Nutritional Biochemicals ORTEC Incorporated Pharmacia Fine Chemicals, Inc. Phipps & Bird, Inc. Polysciences. Inc.

LABORATORY GUIDE

Quantum industries H. Reeve Angel & Co., Inc. Reliable Chemical Co. Schleicher & Schuell, Inc. Scientific Products VWR Scientific

filtration Accron Industries. Inc. Barnebey-Cheney Bio-Rad Laboratories Brinkmann Instruments, inc. Caibiochem The Carborundum Co., Commercial Filters Div. Coast Engineering Laboratory Eagle-Picher Industries, Inc. Floridin Co. Gelman Instrument Co. Johns-Manville LaPine Scientific Co. Michigan Dynamics Nutritional Biochemicals Pharmacia Fine Chemicals. Inc. Phase Separations Ltd. Phipps & Bird, Inc. H. Reeve Angel & Co.. Inc. Reliable Chemical Co. Schleicher & Schuell, Inc. SERFILCO Thompson Hayward Chemical Co. Volu-Sol Chemical & Manufacturing Co. VWR Scientific

gas Accron Industries, Inc. Alltech Associates, Inc. Analabs, Inc. J. T. Baker Chemical Co. Barnebey-Cheney Bio-Rad Laboratories Brinkmann Instruments, Inc. Chemical Research Services. Inc. Coast Engineering Laboratory Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Fisher Scientific Co. The Fluorocarbon Co. Gallard-Schlesinger Chemical Mfg. Corp. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists MG Scientific Gases Packard Instrument Co., Inc. Phase Separations Ltd. Phipps & Bird, Inc. Ronson Metals Corp. Scientific Gas Products Inc. Arthur H. Thomas Co. Varian Instrument Div.

ACIDS inorganic Accron Industries, Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals. Inc. Anderson Laboratories. Inc. Apache Chemicals, Inc. Atomergic Chemetals Co. J. T. Baker Chemical Co. Brinkmann Instruments, Inc. Cationics. Inc. CCM: Schaar Scientific, Inc. Chem Service, Inc. City Chemical Corp. Climax Molybdenum Co. E. I. du Pont de Nemours & Co.. Inc. Eastman Kodak Co. Eastman Kodak Co., Eastman Organic Chemicals Carlo Erba S.p.A.. Chemicals Div. Fielding Chemical Co. Fisher Scientific Co.

GAF Corp., Chemical Div. Gallard-Schlesinger Chemical Mfg. Corp. TheC. P. Hall Co. of Illinois Harleco The Harshaw Chemical Co. Hruden Laboratory Products Hyland ICN Chemical & Radioisotope Div. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MC/B Manufactu r ing Chemists Monsanto Co. Nutritional Biochemicals Omega Chemical Corp. Ozark-Mahoning Co. PCR, Inc. Pennwalt Corp. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Prolabo Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Scientific Proaucts Sigma Chemical Co. G. Frederick Smith Chemical Co. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific

organic Accron Industries. Inc. Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals. Inc. Analabs, Inc. Anderson Laboratories. Inc. Apache Chemicals, Inc. Applied Science Labs.. Inc. Arizona Chemical Co. Baker Castor Oit Co. J. T. Baker Chemical Co. The Borden Chemical Co. Brinkmann Instruments. Inc. Cationics, Inc. CCM: Schaar Scientific, Inc. Celanese Chemical Co. Chem Service, Inc. Chemical Samples Co. Ciba-Geigy Corp. City Chemical Corp. Cyclo Chemical Difco Laboratories E. I. du Pont de Nemours & Co.. Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Carlo Erba S.p.A., Chemicals Div. Farchan Div. Ferro Corp.. Chemical Div. Fielding Chemical Co. Fisher Scientific Co. Frinton Labs. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals A. Gross & Co. Hampshire Chemical M. W. Hardy & Co., Inc. The Harshaw Chemical Co. Henley & Co., Inc. Hyland ICN Chemical & Radioisotope Div. ICN-K&K Labs., inc. Kay-Fries Chemicals, Inc. Kings Laboratories Krishell Laboratories, Inc. Lachat Chemicals, Inc. LaMont Laboratories LaPine Scientific Co. Mallinckrodt Chemical Works. Science Products Div. Marshallton Research Labs., Inc. MC/B Manufacturing Chemists Monsanto Co.

3 Nuclear Medical Systems, Inc. Nutritional Biochemicals PCR, Inc. Pfaltz & Bauer, Inc. Pfanstiehl Labs, Inc. Phipps & Bird, Inc. Phy-Lab Princeton Organics, Inc. Prolabo Regis Chemical Co. Reilly Tar & Chemical Corp. Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. RHO Chemical Co. RS A Corp. Saber Labs., Inc. Schwarz/Mann Scientific Products Sherwin Williams Chemicals Sigma Chemical Co. Supelco, Inc. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics VWR Scientific Willow Brook Laboratories, Inc.

ADSORBENTS, chromatography Analabs, Inc. Analtech, Inc. Applied Science Labs., Inc. J. T. Baker Chemical Co. Barnebey-Cheney Beckman Instruments, inc. Bio-Rad Laboratories Brinkmann Instruments. Inc. Calbiochem Camag, Inc. CCM: Schaar Scientific, inc. Coast Engineering Laboratory Durrum Chemical Corp. EM Laboratories. Inc. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Floridin Co. The Fluorocarbon Co. FMC Corp., Organic & Inorganic Chemicals Div. Gallard-Schlesinger Chemical Mfg. Corp. W. R. Grace & Co, Greiner Scientific Corp. lonac Chemical Co. Johns-Manvitle Kensington Scientific Corp. Laboratory Data Control Lachat Chemicals, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works. Science Products Div. MC/B Manufacturing Chemists Miles Labs., Inc., Research Div. MISCO Scientific Monsanto Co. Multiform Desiccant Products. Inc. Norton Co. {Mass) Ozark-Mahoning Co. Packard Instrument Co.. Inc. Perkin-Elmer Corp. Perkin-Elmer, Ltd. Pharmacia Fine Chemicals. Inc. Phase Separations Ltd. Phipps & Bird. Inc. Phy-Lab Pierce Chemical Co. Pittsburgh Activated Carbon Div. Quantum Industries H. Reeve Angel & Co., inc. Reliable Chemical Co. Rohm and Haas Co. Schleicher & Schuell, Inc. Scientific Manufacturing Industries Scientific Products The Separations Group Sigma Chemical Co. Supelco. Inc. Union Carbide Corp., Molecular Sieve Dept. Varian Instrument Div VWR Scientific

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Allied Chemical Corp. Analabs, Inc. Anderson Laboratories, Inc. J. T. Baker Chemical Co. Brinkmann Instruments. Inc. City Chemical Corp. Eastern Chemical Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Floridin Co. Hach Chemical Co. Hellige, Inc. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. Mailinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Nanogens Omega Chemical Corp. Phase Separations Ltd. Phipps& Bird, Inc. Phy-Lab Pierce Chemical Co. Prolabo Rankin Reagent Co. Regis Chemical Co. Reliable Chemical Co. Scientific Products VWR Scientific

BROMINE COMPOUNDS inorganic Accron Industries. Inc. J. T. Baker Chemical Co. Bodman Chemicals Cationics. Inc. Delta Safety & Supply Co., Inc. Engineered Materials Carlo Erba S.p.A.. Chemicals Div. Fielding Chemical Co. Freeman Industries, Inc. Harleco Hruden Laboratory Products Mailinckrodt Chemical Works. Science Products Div. PCR, Inc. PfaltzS Bauer, Inc. Scientific Products

organic Aldrich Chemical Co., inc. American Minechem Corp. Analabs. Inc. J. T. Baker Chemical Co. Bodman Chemicals Cationics, Inc. Eastern Chemical Engineered Materials' Carlo Erba S.p.A., Chemicals Div. Freeman Industries. Inc. Frinton Labs. TheC. P. Hall Co. of Illinois Kings Laboratories Lachat Chemicals. Inc. Mailinckrodt Chemical Works. Science Products Div. Marshallton Research Labs.. Inc. PCR. inc Pfaltz & Bauer. Inc. Polysciences. Inc. R S A Corp. Saber Labs., Inc. Scientific Products Willow Brook Laboratories, Inc.

Durrum Chemical Corp. Dynalab Corp Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories. Inc. Engelhard Minerals & Chemicals Corp.. Engelhard Industries Div. Carlo Erba S.p.A.. Chemicals Div. Fisher Scientific Co. Gelman Instrument Co. Grand Island Biological Co. Greiner Scientific Corp. Hach Chemical Co Harleco Hellige, Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. Imaginative Alchemy Unlimited LaMotte Chemical Products Co. LaPine Scientific Co. The London Co. Mailinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Microbiological Associates, Inc. Monsanto Co. Nutritional Biochemicals Omega Chemical Corp. Phipps & Bird. Inc. Phy-Lab Pierce Chemical Co. P-L Biochemicals, Inc. Polysciences, Inc. Prolabo Reheis Chemical Co. Reliable Chemical Co. Sargent-Welch Scientific Co. Schwarz/Mann Scientific Products Sigma Chemical Co. Sircor Instruments Corp. Thompson Hayward Chemical Co. Union Carbide Corp.. Chemicals & Plastics VWR Scientific

CALIBRATION GAS MIXTURES FOR CHROMATOGRAPHY AND OTHER INSTRUMENTAL METHODS AIRCO Industrial Gases Air Products & Chemicals, Inc. Alliech Associates, Inc. Analabs. Inc. Analytical Instrument Development, Inc. Applied Science Labs., Inc. Beckman Instruments, Inc. Chemical Data Systems, Inc. Corning Glass Works (N.Y.) Corning Glass Works (Mass.) Instrumentation Laboratory Inc. LaPine Scientific Co. Lif-O-Gen. Inc. Liquid Carbonic Corp. The London Co. Matheson Gas Products McMillan Electronics Corp MG Scientific Gases Phase Separations Ltd. Phillips Petroleum Co. Precision Gas Products. Inc. Process Analyzers. Inc. (Tex.) Rank Precision Industries Ltd.. Analytical Div. Reliable Chemical Co Scientific Gas Products inc. Scientific Products Scott Research Laboratories. Inc. Setaram Sigma Chemical Co. Supelco. inc. Thermco Instrument Corp.

BUFFERING MATERIALS — see also chemicals, pH buffers

CALIBRATION STANDARDS

Aldrich Chemical Co., Inc. Allied Chemical Corp Anachemia Chemicals, Inc. Analabs. Inc. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Bio-Rad Laboratories The Borden Chemical Co. Brinkmann Instruments. Inc. Calbiochem CCM: Schaar Scientific. Inc. Coleman Instruments Corco Chemical Corp. Corning Glass Works (N.Y.) Corning Glass Works (Mass.) Curtin Scientific Co. Difco Laboratories

AIRCO Industrial Gases Air Products & Chemicals, Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Analytical Instrument Development. Inc. Anderson Laboratories. Inc. Andor Chemical Corp. Apache Chemicals, Inc. Aremco Products, Inc. ArRo Labs . Inc. Baird-Atomic, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Chem Service, Inc. Coleman Instruments Corning Glass Works (Mass.) Electro/Mass Laboratory EM Laboratories, Inc.

252 LG AUGUST 1973

inorganic

Fisher Scientific Co. Fi5ke Associates, Inc. Harleco Houston-Atlas, Inc. Hruden Laboratory Products Hycel, Inc. Hyland ICN Chemical & Radioisotope Div. INAX Instruments Ltd. Jarrell-Ash Div. LaPine Scientific Co. The London Co. MC/B Manufacturing Chemists Milton Roy Co. Monitor Labs., Inc. Olson Laboratories, Inc. Orion Research Inc. PCR, Inc. Phase Separations Ltd. Phy-Lab Pressure Chemical Co. Prolabo Reliable Chemical Co. Scientific Gas Products Inc. Scientific Products Sircor Instruments Corp. Smith-Underwood Laboratories Spectro Products, Inc. Technicon Instruments Corp. United Mineral & Chemical Corp. Ventron Corp., Alfa Products

organic Air Products & Chemicals. Inc. Allied Chemical Corp. Anachemia Chemicals. Inc. Analabs, Inc. Analytical Instrument Development. Inc, Anderson Laboratories, Inc. Andor Chemical Corp. Applied Science Labs.. Inc. ArRo Labs., Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Bio-Rad Laboratories Cannon Instrument Co, Carnegie-Mellon University Chem Service. Inc. Chemical Samples Co. Conostan Div. Eastman Kodak Co.. Eastman Organic Chemicals Electro/Mass Laboratory EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Houston-Atlas. Inc. Hruden Laboratory Products Hycel, Inc. Hyland Ionics. Inc. Kings Laboratories Lachat Chemicals, Inc. LaPine Scientific Co. Marshallton Research Labs., Inc, MC/B Manufacturing Chemists Nanogens New England Nuclear Nuclear Medical Systems, Inc. Olson Laboratories. Inc. Packard Instrument Co.. Inc. PCR, Inc. Phase Separations Ltd. Phillips Petroleum Co. Pierce Chemical Co. PolyScience Corp. Pressure Chemical Co. Princeton Organics. Inc. Prolabo Reliable Chemical Co. Scientific Gas Products Inc. Scientific Products Supeico. Inc. Technicon Instruments Corp.

CARBOHYDRATES Aldrich Chemical Co.. Inc. Allied Chemical Corp. Analabs. Inc. Apache Chemicals, Inc. Applied Science Labs., Inc. Ash Stevens Inc. J. T. Baker Chemical Co. Calbiochem Chem Service, Inc. City Chemical Corp. Difco Laboratories Eastern Chemical Eastman Kodak Co.. Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Gallard-Schlesinger Chemical Mfg. Corp. ICN Chemical & Radioisotope Div. Krishell Laboratories, Inc. LaPine Scientific Co. MC/B Manufacturing Chemists Nuclear Medical Systems, Inc. Ptanstiehl Labs, Inc. Phase Separations Ltd.

Phy-Lab Pierce Chemical Co. P-L Biochemicals. Inc. Polysciences, Inc. Reliable Chemical Co. Saber Labs., Inc. SAS Scientific Chemicals, Ltd. Schwarz/Mann Sigma Chemical Co. A. Ë. Staley Mfg. Co. Supeico. Inc. Terra-Marine Bioresearch VWR Scientific

CATALYSTS Accron Industries. Inc. Air Products & Chemicals, Inc. Allied Chemical Corp. Anderson Development Co. Apache Chemicals, Inc. Applied Plastics Co.. Inc. Atlantic Equipment Engineers Barnebey-Cheney CCM: Schaar Scientific. Inc. Coleman Instruments E-C Apparatus Corp. Engelhard Minerals & Chemicals Corp.. Engelhard Industries Div. Carlo Erba S.p.A,. Chemicals Div. Gallard-Schlesinger Chemical Mfg. Corp, Harleco The Harshaw Chemical Co Krishell Laboratories, Inc. Lachat Chemicals. Inc. LaPine Scientific Co. Lithium Corp. of America Mailinckrodt Chemical Works. Science Products Div. M&T Chemicals Inc. MC/B Manufacturing Chemists Mine Safety Appliances Co. MSA Research Corp. Norton Co. (Mass) PCR, Inc. Phase Separations Ltd. Pittsburgh Activated Carbon Div. Polysciences, Inc. Pressure Chemical Co. Ram Chemicals Reliable Chemical Co. Rocky Mountain Research, Inc. Strem Chemicals, Inc. Union Carbide Corp., Chemicals & Plastic s VAR-LAC-OID Chemical Co, Worthington Biochemical Corp.

CHELATING AGENT Accron Industries, Inc. Achem Div. Aldrich Chemical Co.. Inc. Allied Chemical Corp. Amend Drug & Chemical Co.. Inc. The Ames Laboratories. Inc. Apache Chemicals. Inc. Atomergic Chemetals Co. J. T. Baker Chemical Co. Betz Laboratories. Inc. Camag, Inc. Chem Service. Inc. Ciba-Geigy Corp. City Chemical Corp. Eastern Chemical Eastman Kodak Co.. Eastman Organic Chemicals Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Fiske Associates, Inc. Frinton Labs. GAF Corp.. Chemical Div. The C. P. Hati Co. of Illinois Harleco Kings Laboratories LaMont Laboratories LaPine Scientific Co. Mailinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Monsanto Co. PCR, Inc. Pfanstiehl Labs. Inc. Pierce Chemical Co. Reliable Chemical Co. Sigma Chemical Co. G. Frederick Smith Chemical Co. Strem Chemicals, Inc. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics

CHEMICALS general Achem Div. Air Products & Chemicals, Inc. Aldrich Chemical Co.. Inc. Allied Chemical Corp.

LABORATORY GUIDE

CHEMICALS

Amend Drug & Chemical Co., Inc. American Minechem Corp. The Ames Laboratories, Inc. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, inc. Apache Chemicals. Inc. Arizona Chemical Co. Ash Slevens Inc. Atlantic Equipment Engineers J. T. Baker Chemical Co. Barium and Chemicals. Inc. Bodman Chemicals Brinkmann Instruments, Inc. Camag, Inc. Carnegie-Mellon University Cationics. Inc. CCM: Schaar Scientific. Inc. Ceianese Chemical Co. Cerac, Inc. Chem Service, Inc. Chemical δ Solvent Distillers Co., Inc. Chemical Data Systems, Inc. Chemical Samples Co. Ciba-Geigy Corp. City Chemical Corp. Crest Ultrasonics Corp. Detrex Chemical Industries, Inc. E. I. du Pont de Nemours & Co., Inc. Dynasonics Corp. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. Engineered Materials Carlo Erba S.p.A., Chemicals Div. Fairmount Chemical Co., Inc. Fine Organics, Inc. Fisher Scientific Co. FMC Corp., Organic & Inorganic Chemicals Div. Frinton Labs. GAF Corp.. Chemical Div. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. TheC. P. Hall Co. of Illinois Harieco The Harshaw Chemical Co. Heico. inc. ICN Chemical & Radioisotope Div. Kay-Fries Chemicals. Inc. Lachat Chemicals. Inc. LaMotte Chemical Products Co. L & R Manfacturing Co. LaPine Scientific Co. Lithium Corp. of America Magna Corp. Mallinckrodt Chemical Works, Science Products Div. Marshallton Research Labs., Inc. MC/B Manufacturing Chemists Merix Chemical Co. Monitor Labs.. Inc. Monsanto Co. M L Industries, Inc.. Pigments & Chemical Div. Nopco Chemical Div. Ozark-Mahoning Co. PCR, Inc. Pfaltz & Bauer. Inc Phase Separations Ltd. Philadelphia Quartz Co. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Prolabo Ram Chemicals Reilly Tar & Chemical Corp. Rocky Mountain Research, Inc. R S A Corp. Saber Labs., Inc. Semi-Elements. Inc. Sigma Chemical Co, G. Frederick Smith Chemical Co. Story Chemical Corp. Arthur H Thomas Co. Thompson Hayward Chemical Co. Tokyo Kasei Kogyo Co., Ltd. Tudor Scientific Glass Co. Union Carbide Corp.. Chemicals & Plastics United Mineral & Chemical Corp. U. S. industrial Chemicals Co. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products Ventron Corp., Chemicals Div. Virginia Chemicals Inc. VWR Scientific White Chemical Corp. WhittakerCorp.

aerosol Accron Industries. Inc. Acheson Colloids Co. Air Products & Chemicals, Inc. Allied Chemical Corp. Brinkmann Instruments, Inc. Camag. Inc. Cerac. Inc. E. I. du Pont de Nemours & Co.. Inc. Electronic Space Products, Inc.

LABORATORY

GUIDE

Fisher Scientific Co. Gelman Instrument Co. Geoscience instruments Corp. LaPine Scientific Co Nutritional Biochemicals Pennwaft Corp. Phase Separations Ltd. Phillips Petroleum Co. Phipps & Bird. Inc. Phy-Lab Plasti-Kote Co. Quantum Industries Ram Chemicals Royco Instruments, Inc. Schuco Div. Scientific Gas Products Inc. Sigma Chemical Co. Sunshine Chemical Corp. Union Carbide Corp., Chemicals & Plastics

aerospace Accron Industries, Inc. Air Products & Chemicals, Inc. Allied Chemical Corp. Anachemia Chemicals. Inc. Apache Chemicals, Inc. Barnebey-Cheney Cerac, Inc. Eastern Chemical Electronic Space Products, Inc. Hughes Aircraft Co. Lithium Corp. of America Merix Chemical Co. Monsanto Co. Pfaltz & Bauer, Inc. Polysciences. Inc. Reliable Chemical Co, Rocky Mountain Research, Inc. Sunshine Chemical Corp. Tivian Laboratories, Inc. United Mineral & Chemical Corp Ventron Corp.. Affa Products

biochemical Air Products & Chemicals. Inc. Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. The Ames Laboratories. Inc. Anachemia Chemicals. Inc. Analabs, Inc. Apache Chemicals, Inc, Applied Science Labs., Inc. Ash Stevens Inc. J. T. Baker Chemical Co. Biopolymers Laboratory of Genera! Biochemicals Bodman Chemicals Boehringer Mannheim Corp. The Borden Chemical Co. Brinkmann Instruments, Inc. Calbiochem Carbolabs, Inc, CCM: Schaar Scientific, Inc. Chem Service, inc. City Chemical Corp. Cyclo Chemical Dexter Biological Co. Difco Laboratories E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Freeman Industries, Inc.

See the J. T. BAKER CHEMICAL CO. biochemical ad on page 250 Frinton Labs. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals Grand Island Biological Co. Greiner Scientific Corp. M. W. Hardy & Co., Inc Harieco Heico, Inc. Hruden Laboratory Products Hyland ICN Chemical & Radioisotope Div ICN-K&K Labs., Inc. Imaginative Alchemy Unlimited lonac Chemical Co. ' Isolab, Inc. Kay-Fries Chemicals, Inc.

Krishell Laboratories, Inc. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. M&TChemicals Inc. MaurukasCo., Inc. MC/B Manufacturing Chemists Miles Labs., Inc., Research Div. New England Nuclear New Haven Chemical Corp. Nuclear Medical Systems. Inc. Nutritional Biochemicals Omega Chemical Corp. PCR, Inc. Petrarch Systems Pfaltz & Bauer, Inc. Pfanstiehl Labs, Inc. Pharmacia Fine Chemicals. Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. P-L Biochemicals, Inc. Plenum Scientific Research. Inc. Polysciences. Inc. Regis Chemical Co. Reheis Chemical Co. Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. RS A Corp. Saber Labs., Inc. SAS Scientific Chemicals. Ltd. Schwarz/Mann Scientific Products Sigma Chemical Co. Spectrum Medical Industries, Inc. Supelco, Inc. Syva Co. Technicon Instruments Corp. Terra-Marine Bioresearch Union Carbide Corp., Chemicals & Plastics The Upjohn Co., Fine Chemical Marketing VAR-LAC-OID Chemical Co. Ventron Corp., Chemicals Div. VWR Scientific Winfhrop Laboratories Worthington Biochemical Corp.

biological grade Air Products & Chemicals, Inc. Allied Chemical Corp, Amend Drug & Chemical Co.. Inc. Analabs, Inc. Apache Chemicals, Inc. J. T. Baker Chemical Co. Biopolymers Laboratory of General Biochemicals Bodman Chemicals Brinkmann Instruments, Inc. Calbiochem CCM: Schaar Scientific. Inc. City Chemical Corp. Cudahy Labs, Dexter Biological Co. E. I. du Pont de Nemours & Co , Inc. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Grand Island Biological Co. Greiner Scientific Corp. M. W, Hardy SCo., Inc. Harieco Heico, Inc, Hruden Laboratory Products Hyland ICN Chemical & Radioisotope Div. ICN-K&K Labs., Inc. Isolab, Inc. LaPine Scientific Co. MC/B Manufacturing Chemists Miles Labs., Inc., Research Div. National Instrument Laboratories. Inc. Nuclear Medical Systems, inc. Nutritional Biochemicals Pfalt2 & Bauer, Inc. Pfanstiehl Labs, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. P-L Biochemicals. Inc. Polysciences, Inc. Regis Chemical Co, Reliable Chemical Co. SAS Scientific Chemicals. Ltd. Schwarz/Mann Scientific Gas Products Inc'. Scientific Products Sigma Chemical Co. Spectrum-Marine Research Labs., Inc. Terra-Marine Bioresearch VWR Scientific

calorimetric Air Products & Chemicals, Inc Allied Chemical Corp. American Minechem Corp. Apache Chemicals, Inc.

J. T. Baker Chemical Co. Carnegie-Mellon University Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Greiner Scientific Corp. LaPine Scientific Co. Maurukas Co., Inc. Omega Chemical Corp. Parr Instrument Co. Phase Separations Ltd. Phillips Petroleum Co. Phipps & Bird, Inc. Phy-Lab Prolabo Scientific Gas Products Inc. VWR Scientific

chromatographic Achem Div. Air Products & Chemicals, Inc. Alltech Associates, Inc. Amend Drug & Chemical Co.. Inc. Anachemia Chemicals. Inc. Analabs. Inc. Antek Instruments, Inc. Apache Chemicals, Inc, Applied Science Labs., Inc. J. T. Baker Chemical Co. Barnebey-Cheney Beckman Instruments, Inc. Bio-Cal Instrument Co. Biopolymers Laboratory of General Biochemicals Bio-Rad Laboratories Brinkmann Instruments, inc. Calbiochem Camag, Inc. Carnegie-Mellon University CCM: Schaar Scientific Inc. Chem Service, Inc.

See the J. T. BAKER CHEMICAL CO. chromatographic chemicals ad on page 250 Chemical Data Systems. Inc. Chemical Samples Co. City Chemical Corp. Durrum Chemical Corp. Durrum Instrument Corp. Eastern Chemical Eastman Kodak Co.. Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A.. Chemicals Div. Fisher Scientific Co. Floridin Co Frinton Labs. Gallard-Schlesinger Chemical Mfg. Corp Gelman Instrument Co. W. R. Grace & Co. Greiner Scientific Corp. Harieco ICN Chemical & Radioisotope Div. ICN-K&K Labs., Inc. Imaginative Alchemy Unlimited Kensington Scientific Corp. Lachat Chemicals, Inc. LaPine Scientific Co Mallinckrodt Chemical Works, Science Products Div Marshallton Research Labs., inc. MC/B Manufacturing Chemists Nanogens Nutritional Biochemicals Ohio Valley Specialty Chemical Co. Packard Instrument Co., Inc. PCR, Inc, Perkin-Elmer, Ltd. Petrarch Systems Pfaltz & Bauer, Inc. Pharmacia Fine Chemicals, inc Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. PolyScience Corp. Polysciences, Inc. Prolabo Quantum industries H. Reeve Angel & Co., Inc. Regis Chemical Co. Reliable Chemical Co. Rohm and Haas Co. SAS Scientific Chemicals, Ltd. Schleicher &. Schuell, Inc. Scientific Gas Products Inc. Scientific Manufacturing Industries Scientific Products The Separations Group Sigma Chemical Co.

AUGUST 1973 253 LG

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CHEMICALS

Supelco, Inc. Technicon Instruments Corp. Varian Instrument Div VWR Scientific Waters Associates Inc. Wilson Diagnostics, Inc.

combustion apparatus Allied Chemical Corp. Anachemia Chemicals. Inc. J. T. Baker Chemical Co. Bico, Inc. Chemical Data Systems, Inc. Coleman Instruments Curtin Scientific Co. Harry W. Dietert Co. Greiner Scientific Corp. R. J. Harvey Instrument Corp. LaPine Scientific Co. Maxon Corp. Packard Instrument Co., Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Reliable Chemical Co VWR Scientific

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Acheson Colloids Co. EM Laboratories. Inc. Materials Research Corp. Merix Chemical Co. Polysciences, Inc. RCA Electronic Components Reliable Chemical Co. Rocky Mountain Research. Inc Tivian Laboratories, inc. Whitford Corp.

electronic grade Accron Industries. Inc. AIRCO Industrial Gases Air Products & Chemicals. Inc. Allied Chemical Corp. Alpha Analytical Labs. Amend Drug & Chemical Co.. Inc. Anachemia Chemicals. Inc. Apache Chemicals, Inc. Aremco Products. Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Barium and Chemicals. Inc. Bodman Chemicals Brinkmann Instruments. Inc. Cerac,Inc. City Chemical Corp. Corco Chemical Corp. Crest Ultrasonics Corp. Dow Corning Corp. Ε. I. du Pont de Nemours & Co.. Inc. Eagle-Picher Industries. Inc Electronic Space Products. Inc. EM Laboratories. Inc. Engineered Materials Carlo Erba S.p.A., Chemicals Div. Fielding Chemical Co. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. M. W. Hardy &Co., Inc. The Harshaw Chemical Co. Heico, Inc Hruden Laboratory Products Hughes Aircraft Co. Imanco-Metals Research Kawecki Berylco Industries. Inc. Lachat Chemicals, Inc. L& R Manfactjring Co. Mallinckrodt Chemical Works. Science Products Div. M&T Chemicals Inc. Materials Research Corp. Matheson Gas Products Merix Chemical Co, PCR, Inc. Pfaltz & Bauer, Inc. Phillips Manufacturing Co. Phy-Lab Polysciences, Inc. Precision Gas Products, Inc. Princeton Organics, Inc. RCA Electronic Components Reliable Chemical Co. Research Organic/ Inorganic Chemical Corp. Rocky Mountain Research. Inc. Scientific Gas Products Inc. Scientific Products Semi-Elements, Inc. Sunshine Chemical Corp. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific

254 LG AUGUST 1973

heavy liquids for density determination American Minechem Corp. Anderson Laboratories, Inc. R. P. Cargille Labs., Inc. City Chemical Corp. Eastern Chemical Engineered Materials Carlo Erba S.p.A., Chemicals Div. Fielding Chemical Co. Kaltec Scientific Instrument, Inc. MC/B Manufacturing Chemists National Biochemical PCR, Inc. Pfaltz & Bauer, Inc. Polysciences, Inc. VAR-LAC-OI D Chemical Co.

isotope Amersham/Searle Corp. Atomic Energy of Canada Ltd. J. T. Baker Chemical Co. Bio-Rad Laboratories Canrad Precision Industries, Inc. Diaprep, Inc. General Electric Co. General Electric Co., Nuclear Technology & Applications Operations ICN Chemical & Radioisotope Div. Isolab, Inc, 3M Co., Nuclear Products Dept. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/ Nuclear Merck Sharp & Dohme Canada Ltd. Merck & Co., Inc. Miles Labs., Inc., Research Div. New England Nuclear Nuclear Equipment Chemical Corp. Nuclear Medical Systems, Inc. Pfaltz & Bauer, Inc. Phy-Lab SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Gas Products Inc. Stohler Isotope Chemicals, Inc. Union Carbide Corp., Sterling Forest Research Center United Mineral & Chemica! Corp. Ventron Corp., Alfa Products

luminescent Allied Chemical Corp. Alusuisse Metals Inc. Anachemia Chemicals, Inc. Analabs, Inc. Apache Chemicals, Inc. Applied Science Labs., Inc. Canrad Precision Industries. Inc. Cerac. Inc. City Chemical Corp. E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. Gallard-Schlesinger Chemical Mfg. Corp. Hruden Laboratory Products Imanco-Metals Research Kensington Scientific Corp. 3M Co., Nuclear Products Dept. Mallinckrodt Chemical Works. Science Products Div, Materials Research Corp. Pfaltz & Bauer, Inc. Phy-Lab Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. SAS Scientific Chemicals, Ltd. Scientific Manufacturing Industries Semi-Elements, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co.

mercury determining J. T. Baker Chemical Co. Barnebey-Cheney Coleman Instruments Eastern Chemical Eastman Kodak Co., Eastman OrganicChemicals Fielding Chemical Co. Hach Chemical Co. Harleco Hruden Laboratory Products Koslow Scientific Co. Pfaltz & Bauer, Inc. Polysciences. Inc.

milk testing Advanced instruments. Inc. Allied Chemical Corp.

Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. J. T. Baker Chemical Co. Bodman Chemicals CCM: Schaar Scientific, Inc. Cudahy Labs. Eastern Chemical Fielding Chemical Co. Fiske Associates, Inc. Gallard-Schlesinger Chemical Mfg. Corp. Grand Island Biological Co. Greiner Scientific Corp. Harleco LaMotte Chemica! Products Co. LaPine Scientific Co. Lumenite Electronic Corp. Nuclear Medical Systems. Inc. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Prolabo Scientific Products Sigma Chemical Co. Technicon Instruments Corp. Thompson Hayward Chemical Co. VWR Scientific

moisture determining Air Products & Chemicals, Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. CCM: Schaar Scientific, Inc. Harry W. Dietert Co. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. Harleco LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Moisture Register Co. Omega Chemical Corp. Pfaltz & Bauer, Inc. Phipps & Bird. Inc. Phy-Lab Precision Gas Products, Inc. Prolabo Reliable Chemical Co. Scientific Gas Products Inc. Scientific Products G. Frederick Smith Chemical Co. VWR Scientific

nitrogen determining Achem Div. Air Products & Chemicals, Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. J. T. Baker Chemical Co. Camag, Inc. City Chemical Corp. Coleman Instruments Eastern Chemical Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Greiner Scientific Corp. Hach Chemical Co. Harleco Hengar Co. Hyland LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Pfaltz & Bauer. Inc. Phipps & Bird, Inc. Phy-Lab Reliable Chemical Co. Research Appliance Co. Scientific Products Technicon Instruments Corp. Arthur H. Thomas Co. VWR Scientific

organic sulfur compounds Aldrich Chemical Co., Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Analabs, Inc. Angstrom, Inc. Apache Chemicals, Inc. J. T. Baker Chemical Co. Bodman Chemicals Carnegie-Mellon University Chem Service, Inc. Chemical Samples Co. City Chemical Corp. Cosan Chemical Corp. Detrex Chemical Industries, Inc. Eastern Chemical

Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. Frinton Labs. M. W. Hardy &Co., Inc. The Humphrey Chemical Co. ICN Chemical & Radioisotope Div. ICN-K&KLabs., Inc. Krishell Laboratories, Inc. Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists PCR, Inc. Pennwalt Corp. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phillips Petroleum Co. Phipps & Bird, Inc. PolyScience Corp. Polysciences, Inc. Prolabo Reliable Chemical Co. RS A Corp. Saber Labs., Inc. Sherwin Williams Chemicals Sigma Chemical Co. Specialty Organics, Inc. Union Carbide Corp., Chemicals & Plastics Ventron Corp,, Chemicals Div. Willow Brook Laboratories, Inc.

organometallic Accron Industries, Inc. Agrashell, Inc. Aldrich Chemical Co.. Inc. Allied Chemical Corp. Anderson Development Co. Angstrom, Inc. Apache Chemicals, Inc. Arapahoe Chemicals Atomergic Chemetals Co. Austin Science Associates. Inc. J. T. Baker Chemical Co. Cationics, Inc. Chemical Samples Co. City Chemical Corp. Climax Molybdenum Co. Cosan Chemical Corp. Eastern Chemical Eastman Kodak Co.. Eastman Organic Chemicals Electronic Space Products, Inc. Carlo ErbaS.p.A., Chemicals Div. Ferro Corp.. Chemical Div. Frinton Labs. D. F. Goldsmith Chemical & Metal Corp. M. W. Hardy &Co.. Inc. The Harshaw Chemical Co. Henley & Co., Inc. ICN Chemical & Radioisotope Div. ICN-K&KLabs., Inc. Kings Laboratories Lachat Chemicals, Inc. LaMont Laboratories Lithium Corp. of America M&T Chemicals Inc. Marshallton Research Labs., Inc. Matheson Gas Products Matthey Bishop, Inc. Mine Safety Appliances Co. MSA Research Corp. National Spectrograph^ Laboratories, Inc. Ohio Valley Specialty Chemical Co. Orgmet. Inc. PCR, Inc. Petrarch Systems Pfaltz & Bauer, Inc, Phase Separations Ltd. Polysciences, Inc. Pressure Chemical Co. Reliable Chemical Co. RHO Chemical CO. Scientific Gas Products Inc. Sigma Chemical Co. Specialty Organics, Inc. Stohler Isotope Chemicals, Inc. Strem Chemicals, Inc. Union Carbide Corp., Chemicals & Plastics United Mineral & Chemical Corp. VAR-LAC-OI D Chemical Co. Ventron Corp., Alfa Products Ventron Corp., Chemicals Div. Willow Brook Laboratories. Inc.

oxidizing compounds Accron Industries, Inc. Achem Div. Air Products & Chemicals, Inc. Aldrich Chemical Co., Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Apache Chemicals, inc. J. T. Baker Chemical Co. Camag, Inc. Carus Chemical Co., Inc.

LABORATORY GUIDE

CHEMICALS

Chem Service, Inc, City Chemical Corp. E. I. du Pont de Nemours &Co., Inc. Eastman Kodak Co., Eastman Organic Chemicals Carlo Erba S.p. Α., Chemicals Div. FMC Corp., Organic & Inorganic Chemicals Div. M. W. Hardy &Co., Inc. Harleco Hummel Chemical Co., Inc. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Nuclear Medical Systems, Inc. Ozark-Mahoning Co. Pacific Engineering & Production Co. of Nevada PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Ram Chemicals Reliable Chemical Co. G. Frederick Smith Chemical Co. Tenneco Chemicals, Inc. Thompson Hayward Chemical Co. Ventron Corp., Alfa Products

pH buffers

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Accron Industries, Inc. Ace Scientific Supply Co., Inc. Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analytical Measurements, Inc. Anderson Laboratories. Inc. Andor Chemical Corp. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Betz Laboratories, Inc. The Borden Chemical Co. Brinkmann Instruments, Inc. Calbiochem R. P. Cargille Labs., Inc. CCM:Schaar Scientific, Inc. Central Scientific Co. Coleman Instruments Corco Chemical Corp. Corning Glass Works (N.Y.) Corning Glass Works (Mass.) Curtin Scientific Co. Delta Scientific Corp. Difco Laboratories Durrum Chemical Corp. Eastern Chemical EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. F & J Scientific Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Gelman Instrument Co. General Biochemicals Greiner Scientific Corp. Hach Chemical Co. Harleco Helena Laboratories Hellrge, Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. Imaginative Alchemy Unlimited Instrumentation Laboratory Inc. LaMotte Chemical Products Co. LaPine Scientific Co. Leeds & NorthrupCo. The London Co. Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Microbiological Associates, Inc. Monsanto Co. Nuclear Medical Systems, Inc. Omega Chemical Corp. Pfaltz & Bauer, Inc. Phipps & Bird, inc. Photovolt Corp. Phy-Lab Pierce Chemical Co. P-L Biochemicals, Inc. Polysciences, Inc. Reheis Chemical Co. Schwarz/Mann Scientific Products Sensorex Sigma Chemical Co. Sircor Instruments Corp. Spectrum Medical Industries, Inc. Technicon Instruments Corp. Arthur H. Thomas Co. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics VWR Scientific

phosphors Aldrich Chemical Co., Inc. Anachemia Chemicals, Inc. City Chemical Corp.

256 LG AUGUST 1973

Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. Carlo ErbaS.p.A., Chemicals Div. The Harshaw Chemical Co. Hruden Laboratory Products ICN Chemical & Radioisotope Div. InterexCorp. Isolab, Inc. Kensington Scientific Corp. Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists New England Nuclear Nuclear Equipment Chemical Corp. Packard Instrument Co., Inc. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Polysciences, Inc. Quantum Industries RCA Electronic Components Reliable Chemical Co. SAS Scientific Chemicals, Ltd. Scientific Gas Products Inc. Scientific Manufacturing Industries Semi-Elements, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products

photographic Accron Industries, Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. J. T. Baker Chemical Co. Carus Chemical Co., Inc. Ciba-Geigy Corp. City Chemical Corp. E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fairmount Chemical Co., Inc. GAFCorp., Industrial Photo Div. Gallard-Schlesinger Chemical Mfg. Corp. M. W. Hardy & Co., Inc. The Harshaw Chemical Co. Heico, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Merix Chemical Co. National Spectrographic Laboratories, Inc. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Sherwin Williams Chemicals Thompson Hayward Chemical Co. Townley Chemical Corp. The Upjohn Co., Fine Chemical Marketing VAR-LAC-OID Chemical Co.

platinum metal Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Apache Chemicals. Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. City Chemical Corp. E. I. du Pont de Nemours & Co., Inc. Electronic Space Products, Inc. Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Fairmount Chemical Co., Inc. D. F. Goldsmith Chemical & Metal Corp. Hruden Laboratory Products Materials Research Corp. Matthey Bishop, Inc. MC/B Manufacturing Chemists PCR, Inc: Pfalt2& Bauer, Inc. Phipps & Bird, inc. Polysciences, Inc. Prolabo Reliable Chemical Co. TheSel-RexCo. Strem Chemicals, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific

polarographic Allied Chemical Corp. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Brinkmann Instruments, Inc. Carlo Erba S.p.A., Chemicals Div. Hruden Laboratory Products LaPine Scientific Co. MC/B Manufacturing Chemists

Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab

Thompson Hayward Chemical Co. Union Carbide Corp.. Chem.icais 8 VAR-LAC-OID Chemical Co. VWR Scientific

See the J. Γ. BAKER CHEMICAL CO. polarographic chemicals ad on page 250 Reliable Chemical Co. G. Frederick Smith Chemical Co. Southwestern Analytical Chemicals, Inc.

radioactive Aerotest Operations AIRCO Industrial Gases Amersham/Searle Corp. AMETEK/Calmec Applied Science Labs., Inc. Biopoiymers Laboratory of General Biochemicals Calbiochem Central Scientific Co. Cerac. Inc. Eberline instrument Corp. General Electric Co. General Electric Co., Nuclear Technology & Applications Operations ICN Chemical & Radioisotope Div. Isolab, Inc. 3M Co., Nuclear Products Dept. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/Nuclear Miles Labs., Inc., Research Div. New England Nuclear Nuclear Associates, Inc. Nuclear Equipment Chemical Corp. Nuclear Materials & Equipment Corp. Nuclear Medical Systems, Inc. Nucleonic Corp. of America Packard Instrument Co., Inc. PCR, Inc. Rocky Mountain Research, Inc. Schwarz/Mann Scientific Gas Products Inc. Spectrum Medical Industries, Inc. Union Carbide Corp., Sterling Forest Research Center

reagent, acids Accron Industries, Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs., Inc. Atomergic Chemetals Co. J. T. Baker Chemical Co. Beckman Instruments, Inc. Brinkmann Instruments. Inc. Cationics, Inc. CCM: Schaar Scientific, Inc. Chemical Samples Co. City Chemical Corp. Corco Chemical Corp. E. 1. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo ErbaS.p.A., Chemicals Div. Fielding Chemical Co. Fisher Scientific Co. Gaiiard-Schtesinger Chemical Mfg. Corp. General Biochemicals Greiner Scientific Corp. Hach Chemical Co. TheC. P. Hall Co. of Illinois Harleco Hyland ICN Chemical & Radioisotope Div. Lachat Chemicals, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Matheson Scientific MC/B Manufacturing Chemists Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc, Phy-Lab Prolabo Rocky Mountain Research, Inc. SAS Scientific Chemicals. Ltd. Scientific Products G. Frederick Smith Chemical Co.

reagent grade Accron Industries, Inc. Aero Chemical Corp. Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. American Minechem Corp. The Ames Laboratories, Inc. Anachemia Chemicals, Inc. Analabs, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs., Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Barium and Chemicals. Inc. Bodman Chemicals Brinkmann Instruments, Inc. Cationics, Inc. CCM: Schaar Scientific, Inc. Central Scientific Co. Chem Service, Inc. Chemical Samples Co. City Chemical Corp. Corco Chemical Corp. E. I. du Pont de Nemours & Co., Inc. Eagle-Picher Industries, Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo ErbaS.p.A., Chemicals Div. Fielding Chemical Co. Fine Organics, Inc. Fisher Scientific Co. Frinton Labs. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals D. F. Goldsmith Chemical & Metal Corp. Greiner Scientific Corp. Hach Chemical Co. Harleco Heico, Inc. Hyland ICN Chemical & Radioisotope Div. Isolab, Inc. Lachat Chemicals, Inc. LaMont Laboratories LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. Marshallton Research Labs., inc. MC/B Manufacturing Chemists Miles Labs., Inc., Research Div. MSA Research Corp. New England Nuclear Omega Chemical Corp. PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Prolabo Regis Chemical Co. Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Research Products International Corp. Rocky Mountain Research. Inc. RS A Corp. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Products G. Frederick Smith Chemical Co. Story Chemical Corp. Supelco, Inc. Thompson Hayward Chemical Co. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp.. Chemicals Dtv. VWR Scientific

scintillation Aldrich Chemical Co., Inc. Amersham/Searle Corp. Analabs, Inc. Apache Chemicals, Inc. Arapahoe Chemicals Atomergic Chemetals Co. J. T. Baker Chemical Co. Beckman Instruments, Inc. Bodman Chemicals The Borden Chemical Co. Calbiochem City Chemical Corp. Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo ErbaS.p.A.. Chemicals Div. The Harshaw Chemical Co.

LABORATORY GUIDE

CHEMICALS COMPOUNDS, DEUTERIUM R. J. Harvey Instrument Corp. ICN Chemical & Radioisotope Div. ICN-K&KLabs., Inc. Interex Corp. Intertechnique Instruments, Inc. Isolab, Inc. Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists New England Nuclear Nuclear Associates, Inc. Nuclear Enterprises, Inc.

See t h e J. T. BAKER CHEMICAL CO. scintillation chemicals ad o n page 250

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Nuclear Equipment Chemical Corp. Nuclear Medical Systems, Inc. Packard Instrument Co., Inc. PCR, Inc. Pfaltz & Bauer, Inc. Phy-Lab Polysciences, Inc. Princeton Organics, Inc. Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Research Products International Corp. Spectrum Medical Industries, Inc. VAR-LAC-OID Chemical Co.

spectrographic Allied Chemical Corp. Alpha Analytical Labs. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Apache Chemicals, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Bodman Chemicals Brinkmann Instruments, Inc. Cannon Instrument Co. Carnegie-Mellon University CCM: Schaar Scientific, Inc. Chemical Samples Co. City Chemical Corp. Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. The Harshaw Chemical Co. Heico, Inc. Hruden Laboratory Products Jarrell-Ash Div. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Met-Bay, Inc. National Spectrographic Laboratories, Inc. PCR, Inc. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Proiabo Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Rockland Instrument Corp. Semi-Elements, Inc. Spex Industries, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products Wilmad Glass Co., Inc. Zeebac Inc.

spectrophotometric Achem Div. Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Bodman Chemicals Brinkmann Instruments, Inc. G. F. Sush Associates Calbiochem Camag, Inc. Carnegie-Mellon University Chem Service, Inc. Cily Chemical Corp. Coleman Instruments Corco Chemical Corp.

258 LG AUGUST 1973

Corning Glass Works (Mass.) Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Hach Chemical Co. Harleco Hruden Laboratory Products Hyland Instrumentation Laboratory Inc. Jarrell-Ash Div. Lachat Chemicals, Inc. LaMont Laboratories LaPine Scientific Co. MACBETH Color & Photometry Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists PCR, Inc. Pfaltz & Bauer, Inc. Phillips Petroleum Co. Phipps & Bird. Inc. Phy-Lab Pierce Chemical Co. Proiabo Reliable Chemical Co. Scientific Gas Products Inc. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. G. Frederick Smith Chemical Co. VWR Scientific

standard solutions Ace Scientific Supply Co., Inc. Advanced Instruments, Inc. Allied Chemical Corp. Alpha Analytical Labs. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs.. Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Bio-Med-Chem Co. Brinkmann Instruments, Inc. Calbiochem Central Scientific Co. Chem Service, Inc. City Chemical Corp. Coleman Instruments Corco Chemical Corp. Corning Glass Works (Mass.) Curtin Scientific Co. Delta Scientific Corp. Eastern Chemical EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. F & J Scientific Fisher Scientific Co. Fiske Associates, Inc. Gelman Instrument Co. General Biochemicals Hach Chemical Co. Harleco Hellige, Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. Instrumentation Laboratory Inc. Jarrell-Ash Div. Lachat Chemicals, Inc. LaMotte Chemical Products Co.

static eliminators

ultraviolet absorbing

Central Plastics Distributors Co. Electronic Space Products, Inc. Greiner Scientific Corp. TheC. P. Hall Co. of Illinois 3M Co., Nuclear Products Dept. Merix Chemical Co. Nuclear Products Co. Phipps & Bird, Inc.

Accron Industries, inc. J. T. Baker Chemical Co. Chem Service, Inc. Ciba-Geigy Corp. FerroCorp., Chemical Div. GAF Corp., Chemical Div. M. W. Hardy & Co., Inc. Merix Chemical Co. Phy-Lab Polysciences, Inc. Reliable Chemical Co. SigmaChemical Co. VAR-LAC-OID Chemical Co.

steroids Aldrich Chemical Co., Inc. Analabs, Inc. Apache Chemicals, Inc. Applied Science Labs., Inc. Arapahoe Chemicals J. T. Baker Chemical Co. Chem Service, Inc. City Chemical Corp. EM Laboratories, Inc. Fellows Medical Mfg. Co., Inc. Henley & Co., Inc. Hyland New England Nuclear Pfaltz & Bauer, Inc. Pierce Chemical Co. Reliable Chemical Co. Schwarz/Mann SearleChemicals, inc. SigmaChemical Co. Supelco, Inc. The Upjohn Co., Fine Chemical Marketing

transistor (semiconductor) ,

LaPine Scientific Co.

The London Co. Mallinckrodt Chemical Works, Science Products Div. Medical Chemical Corp. Miles Labs., Inc., Research Div. Nanogens New England Nuclear Nuclear Equipment Chemical Corp. Omega Chemical Corp. Oxford Laboratories Packard Instrument Co., Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phillips Petroleum Co. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Precision Gas Products, Inc. Proiabo Rankin Reagent Co. Regis Chemical Co. Reliable Chemical Co. Scientific Gas Products Inc. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. G. Frederick Smith Chemical Co. Spectro Products, Inc. Stewart Laboratories. Inc. Technicon Instruments Corp. Varian Instrument Div. VWR Scientific

Air Products & Chemicals, Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Apache Chemicals, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Cerac, Inc. City Chemical Corp. Eagle-Picher Industries, Inc. EM Laboratories, Inc. Hi-Temp Glass Products, Inc. Hruden Laboratory Products ICN-K&K Labs., Inc. Imanco-Metals Research LaMont Laboratories Mallinckrodt Chemical Works, Science Products Div. Materials Development Corp. Matheson.Gas Products Merix Chemical Co. PCR, Inc. Phy-Lab Reliable Chemical Co. Rocky Mountain Research, Inc. Scientific Gas Products Inc. Semi-Elements, Inc. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products

ultrasonic cleaning Accron Industries, inc. Allied Chemical Corp. Beckman Instruments. Inc. The Bendix Corp. Blackstone Ultrasonics, Inc.

Castie Co.

Chemical & Solvent Distillers Co., Inc. Crest Ultrasonics Corp. Detrex Chemical Industries, Inc. E. I. du Pont de Nemours & Co., Inc. Dynasonics Corp. Esterline Angus Forest Scientific, Inc. Geoscience Instruments Corp. Greiner Scientific Corp. Harleco International Products Corp. Lab-Items Associates L & R Manfacturing Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Molectrics, Inc. Nuclear Equipment Chemical Corp. Phillips Manufacturing Co. Phy-Lab Polysciences, Inc. Research Appliance Co. Sara-Sonic Co. Scientific Products Sonicor Instrument Corp. Sunshine Chemical Corp. Ultrasonic instruments International Ltd. VWR Scientific Wave Energy Systems, Inc.

wetting agents Accron Industries, Inc. Air Products & Chemicals, Inc. Allied Chemical Corp. American Minechem Corp. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Baker Castor Oil Co. J. T. Baker Chemical Co. Betz Laboratories, Inc. Chem Service, Inc. Ciba-Geigy Corp. GAF Corp., Chemical Div. TheC. P. Hall Co. of Illinois M. W. Hardy & Co., Inc. Harleco Hyland Instrumentation Laboratory Inc. Johnson-March Corp. Lachat Chemicals, Inc. The London Co. Mallinckrodt Chemical Works, Science Products Div. Merix Chemical Co. Nopco Chemical Div. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Reliable Chemical Co. Rohm and Haas Co. Sigma Chemical Co. Sunshine Chemical Corp. Technicon instruments Corp. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics

zone refined Aldrich Chemical Co., Inc. Analabs, Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Chemical Samples Co. City Chemical Corp. Eagle-Picher Industries, Inc. Electronic Space Products, Inc. Carlo Erba S.p.A., Chemicals Div. D. F. Goldsmith Chemical & Metal Corp. Hruden Laboratory Products LaPine Scientific Co. Materials Research Corp. Pfaltz & Bauer, Inc. Princeton Organics, Inc. Reliable Chemical Co. Rocky Mountain Research, Inc. Semi-Elements, Inc. United Mineral & Chemical Corp. VAR-LAC-Ol D Chemical Co. Ventron Corp., Alfa Products

COMPOUNDS, deuterium Aldrich Chemical Co., Inc. Analabs, Inc. J. T. Baker Chemical Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem City Chemical Corp. Diaprep, Inc. EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. ICN Chemical & Radioisotope Div, ICN-K&K Labs., Inc. Mallinckrodt Chemical Works, Science Products Div. Marshallton Research Labs., Inc. Matheson Gas Products Merck Sharp & Dohme Canada Ltd. Merck & Co., Inc. Milton Roy Co. Nuclear Equipment Chemical Corp. Nutritional Biochemicals Organomation Associates, Inc. PCR, Inc. Pfaltz S Bauer, Inc. Phase Separations Ltd. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Gas Products Inc.

LABORATORY

GUIDE

C O M P O U N D S , HIGH PURITY ELEMENTS Stohler Isotope Chemicals, Inc. Ventron Corp., Alfa Products

COMPOUNDS, HIGH PURITY inorganic Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Barium and Chemicals, Inc. Bodman Chemicals Brinkmann Instruments, Inc. Cationics, Inc. Cerac, Inc. Chem Service, Inc. City Chemical Corp. Climax Molybdenum Co. Corco Chemical Corp. Electronic Space Products, Inc. EM Laboratories, Inc. Engineered Materials Carlo Erba S.p.A.. Chemicals Div.

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See the J. T. BAKER CHEMICAL CO. inorganic high purity c o m p o u n d s ad o n p a g e 250 Fairmount Chemical Co., Inc. Fielding Chemical Co. Fisher Scientific Co. Freeman Industries, Inc. Gallard-Schlesinger Chemical Mfg. Corp. D. F. Goldsmith Chemical & Metal Corp. M. W. Hardy &Co., Inc. Harleco The Harshaw Chemical Co. Heico, Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. Jarrell-Ash Div. Kawecki Berylco Industries, Inc. Kennameta! Inc. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. Materials Research Corp. MC/B Manufacturing Chemists Medical Chemical Corp. Merix Chemical Co. Mine Safety Appliances Co. MSA Research Corp. Nuclear Equipment Chemical Corp. Omega Chemical Corp. Ozark-Mahoning Co. PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Precision Gas Products, Inc. Pressure Chemical Co. Prolabo Reliable Chemical Co. Research Chemicals Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Ronson Metals Corp. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Gas Products Inc. Semi-Elements, Inc. Spex Industries, inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific

organic Aldrich Chemical Co., Inc. Allied Chemical Corp. The Ames Laboratories, Inc. Anachemia Chemicals, Inc. Analabs, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs., Inc. Aremco Products, Inc.

260 LG AUGUST 1973

Atomergic Chemetals Co. J. T. Baker Chemical Co. Bodman Chemicals The Borden Chemical Co. Brinkmann Instruments, Inc. Carbolabs, Inc. Carnegie-Mellon University Cationics, Inc. Chem Service, inc. Chemical Data Systems, Inc. Chemical Samples Co. City Chemical Corp. Cudahy Labs. Cyclo Chemical Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Electronic Sp'ace Products, Inc. Carlo Erba S.p.A., Chemicals Div. Farchan Div. Fielding Chemical Co. Fine Organics, Inc. Fisher Scientific Co.

See the J. T. BAKER CHEMICAL CO. o r g a n i c high purity c o m p o u n d s ad o n page 250 Freeman Industries, Inc. Frinton Labs. Gallard-Schlesinger Chemical Mfg. Corp. M. W. Hardy & Co., Inc. Harleco The Harshaw Chemical Co. Heico, Inc. Hruden Laboratory Products The Humphrey Chemical Co. ICN Chemical & Radioisotope Div. Imaginative Alchemy Unlimited Lachat Chemicals, inc. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. Materials Research Corp. MC/B Manufacturing Chemists Medical Chemical Corp. New England Nuclear New Haven Chemical Corp. Nuclear Equipment Chemical Corp. Nutritional Biochemicals Omega Chemical Corp. Packard Instrument Co., Inc. PCR, Inc. Pfaltz & Bauer, Inc.' Phase Separations Ltd. Phillips Petroleum Co. Phy-Lab Pierce Chemical Co. Pollard & Co. PolyScience Corp. Polysciences, Inc. Precision Gas Products, Inc. Pressure Chemical Co. Princeton Organics, Inc. Prolabo Pyrazine Specialties Regis Chemical Co. Reheis Chemical Co. Reilly Tar & Chemical Corp. Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. RHO Chemical Co. RS A Corp. Saber Labs., Inc. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Gas Products Inc. Sigma Chemical Co. Specialty Organics, Inc. Story Chemical Corp. Supeico, Inc. Syva Co. Union Carbide Corp., Chemicals & Plastics VWR Scientific Willow Brook Laboratories, Inc. Wilmad Glass Co., Inc. Winthrop Laboratories

zone refined Aldrich Chemical Co., Inc. Analabs, Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J, T. Baker Chemical Co. Brinkmann Instruments, Inc. Chemical Samples Co. City Chemical Corp.

Eagle-Picher Industries, Inc. Electronic Space Products, Inc. Carlo Erba S.p.A., Chemicals Div. Gallard-Schlesinger Chemical Mfg. Corp. Hruden Laboratory Products Materials Research Corp. Pfaltz & Bauer, Inc. Princeton Organics, Inc. Reliable Chemical Co. Rocky Mountain Research, Inc. Semi-Elements, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co.

COMPRESSED GASES, GAS MIXTURES, AND RARE GASES Airco, Inc. AIRCO Industrial Gases Air Products & Chemicals, Inc. Analabs, Inc. Analytical Instrument Development, Inc. Bio-Rad Laboratories Chemetron Corp., Industrial Gases City Chemical Corp. Corning Glass Works (Mass) Fisher Scientific Co. Gardner Cryogenics Div. Instrumentation Laboratory Inc. International Minerals & Chemical Corp. LaPine Scientific Co. Lif-O-Gen, Inc. Liquid Carbonic Corp. The London Co. Matheson Gas Products MG Scientific Gases Olson Laboratories, Inc. Ozark-Mahoning Co. PCR, Inc. Petrarch Systems Phase Separations Ltd. Phillips Petroleum Co. Precision Gas Products, Inc. Rank Precision Industries Ltd., Analytical Div. Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Scientific Gas Products Inc. Scott Research Laboratories, Inc. Superior Air Products Co. Tescom Corp. Thermco Instrument Corp. Union Carbide Corp., Linde Div. VWR Scientific

DESICCANTS Accron Industries, Inc. Air Products & Chemicals, Inc. Allied Chemical Corp. Alltech Associates, Inc. Amend Drug & Chemical Co., Inc. Analabs, Inc. J. T. Ba-ker Chemical Co. Barium and Chemicals, Inc. Barn ebey-Cheney COM: Schaar Scientific, Inc. City Chemical Corp. Coast Engineering Laboratory Coleman Instruments Engelhard Minerais & Chemicals Corp., Engelhard Industries Div. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Floridin Co. Gallard-Schlesinger Chemical Mfg. Corp. W. R. Grace & Co. Greiner Scientific Corp. Hach Chemical Co. W. A. Hammond DrieriteCo. Kahn & Co., Inc. Kaufman Glass Co. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Merix Chemical Co. Multiform Desiccant Products, Inc. PCR, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Scientific Products G. Frederick Smith Chemical Co. Arthur H. Thomas Co. Thompson Hayward Chemical Co. Union Carbide Corp., Linde Div. Union Carbide Corp., Molecular Sieve Dept. United Mineral & Chemical Corp. VWR Scientific

DYES, fluorescent Achem Div. Aldrich Chemical Co., Inc.

Allied Chemical Corp. American Gas & Chemicals, Inc. J. T. Baker Chemical Co. The Borden Chemical Co. Calbiochem Camag, Inc. Ciba-Geigy Corp. City Chemical Corp. Colorado Serum Co. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Fiske Associates, Inc. Gallard-Schlesinger Chemical Mfg. Corp. Harleco LaPine Scientific Co. MC/B Manufacturing Chemists Nutritional Biochemicals Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Regis Chemical Co. Reliable Chemical Co. Scientific Manufacturing Industries Scientific Products Sigma Chemical Co. VAR-LAC-OID Chemical Co. VWR Scientific

ELEMENTS high purity AIRCO Industrial Gases Air Products & Chemicals, Inc. Allied Chemical Corp. Alusuisse Metals Inc. Amend Drug & Chemical Co., inc. American Smelting & Refining Co. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. The Carborundum Co., Refractories & Electronics Div. Cerac, Inc. City Chemical Corp. Climax Molybdenum Co. Corco Chemical Corp. E. I. du Pont de Nemours & Co., Inc. Eagle-Picher Industries, Inc. Electronic Space Products, Inc. Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Engineered Materials Fisher Scientific Co. D. F. Goldsmith Chemical & Metal Corp. Goldsmith Precious Metals Div. Henley & Co., Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. Image Analysing Computers, Inc. Imanco-Metals Research Jarrell-Ash Div. Kawecki Berylco Industries, Inc. Kennametal Inc. Morris P. Kirk & Sons, Inc. LaPine Scientific Co. Lithium Corp. of America Materials Research Corp. Matheson Gas Products MC/B Manufacturing Chemists Michigan Chemical Corp. MSA Research Corp. Ν L Industries, Inc., Metal Div. Nuclear Equipment Chemical Corp. Nuclear Materials & Equipment Corp. PCR, Inc. Phase Separations Ltd. Polysciences, Inc. Precision Gas Products, Inc. Prolabo PureCarbon Co., Inc. Reactor Experiments, Inc. Reliable Chemical Co. Research Chemicals Research Organic/Inorganic Chemical Corp. Rockland Instrument Corp. Rocky Mountain Research, Inc. SAS Scientific Chemicals, Ltd. Scientific Gas Products Inc. Semi-Elements, Inc. Spex Industries, Inc. Titanium Metal Corp. of America Ultra Carbon Corp. United Mineral & Chemical Corp. VAR-LAC-01D Chemical Co. Ventron Corp., Alfa Products Ventron Corp., Chemicals Div.

radioactive Aerotest Operations Amersham/Searle Corp. Baird-Atomic, Inc. Cerac, Inc.

LABORATORY GUIDE

ELEMENTS KITS General Electric Co.. Nuclear Technology & Applications Operations Gulf Radiation Technology ICN Chemical & Radioisotope Div. Isolab, Inc. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/ Nuclear New England Nuclear Nuclear Associates, Inc. Nuclear Equipment Chemical Corp. Nuclear Materials & Equipment Corp. Nuclear Medical Systems, Inc. Nuclear Semiconductor Nucleonic Corp. of America Schwarz/Mann Scientific Gas Products Inc. Union Carbide Corp., Sterling Forest Research Center

ENZYMES, purified

s 1 φ

δ

π

Amend Drug & Chemical Co., Inc. Applied Science Labs., Inc. Beckman Instruments, Inc. Boehringer Mannheim Corp. Brinkmann Instruments, Inc. Calbiochem City Chemical Corp. Cudahy Labs. EM Laboratories, Inc. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Harleco Henley & Co., Inc. Hyland ICN Chemical & Radioisotope Div. LaPine Scientific Co. Maurukas Co., Inc. Miles Labs., Inc., Research Div. Novo Enzyme Corp. Nutritional Biochemicals Pfaltz & Bauer, Inc. Pfanstiehl Labs, Inc. Phase Separations Ltd. Phy-Lab P-L Biochemicals, Inc. Polysciences, Inc. Reheis Chemical Co. Reliable Chemical Co. Schwarz/Mann Scientific Products Sigma Chemical Co. Supelco, Inc. Wilson Diagnostics, Inc. Worthington Biochemical Corp,

FILTER GEL Air Products & Chemicals, Inc. Aldrich Chemical Co., Inc. Analabs, Inc. Bio-Rad Laboratories Coast Engineering Laboratory Isolab, Inc. LaPine Scientific Co. Pharmacia Fine Chemicals, Inc. Phase Separations Ltd. Waters Associates Inc.

INDICATORS chemical Achem Div. Aldrich Chemical Co., Inc. Amend Drug & Chemical Co., inc. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Applied Science Labs., Inc. J. T. Baker Chemical Co. Betz Laboratories, Inc. Calbiochem Camag, Inc. CCM: Schaar Scientific, Inc. Chem Service, Inc. City Chemical Corp. Coast Engineering Laboratory Corco Chemical Corp. Delta Scientific Corp. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fielding Chemical Co. Fine Organics, Inc. Fisher Scientific Co. The Foxboro Co. Freeman Industries, Inc. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. Hach Chemical Co. Harleco ICN Chemical & Radioisotope Div. ICN-K&KLabs-, Inc. ITT Barton Kings Laboratories LaMont Laboratories

262 LG AUGUST 1973

LaMotte Chemical Products Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Martin-Decker Co. MC/B Manufacturing Chemists Medical Chemical Corp. MG Scientific Gases Milton Roy Co. Nutritional Biochemicals Omega Chemical Corp. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Pierce Chemical Co. Prolabo Reliable Chemical Co. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. G. Frederick Smith Chemical Co. Smith-Underwood Laboratories Spectrum-Marine Research Labs., Inc. United States Testing Co,, Inc. VWR Scientific

PH Ace Scientific Supply Co., Inc. Achem Div. Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Amstro Corp. Anachemia Chemicals, Inc. Analytical Measurements, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. J. T. Baker Chemical Co. Betz Laboratories, Inc. Camag, Inc. CCM: Schaar Scientific, Inc. City Chemical Corp. Corco Chemical Corp. Corning Glass Works (N.Y.) Corning Glass Works (Mass.) Delta Scientific Corp. Difco Laboratories Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Elnik Instruments, Inc. EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. F & J Scientific Fielding Chemical Co. Fine Organics, Inc. Fisher Scientific Co. The Foxboro Co. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals Greiner Scientific Corp. Hach Chemical Co. Harleco Hellige, Inc. Honeywell, Inc., Industrial Div. ICN Chemical & Radioisotope Div. Instrumentation Laboratory Inc. Kent Cambridge Instrument Co. Kings Laboratories LaMotte Chemical Products Co. LaPine Scientific Co. Leeds & Northrup Co. The London Co. Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Medical Chemical Corp. MG Scientific Gases Nutritional Biochemicals Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Prolabo H. Reeve Angel & Co., Inc. Reliable Chemical Co. Schleicher & Schuell, Inc. Scientific Products Sensorex Sigma Chemical Co. Sircor Instruments Corp. Smith-Underwood Laboratories VWR Scientific

test papers indicators pH Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. J. T. Baker Chemical Co. Brinkmann Instruments, Inc. Calbiochem R. P. Cargille Labs., Inc. CCM: Schaar Scientific, Inc. EM Laboratories, Inc. Carlo ErbaS.p.A., Chemicals Div. F & J Scientific Fil-Chem, Inc. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. Harleco ICN Chemical & Radioisotope Div.

LaMotte Chemical Products Co. LaPine Scientific Co. MG Scientific Gases Nutritional Biochemicals Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Prolabo H. Reeve Angel & Co., Inc. Schleicher & Schuell, Inc. Scientific Products VWR Scientific

Regis Chemical Co. Reliable Chemical Co. Rohm and Haas Co. The Separations Group SERFILCO Sigma Chemical Co. Technicon Instruments Corp. Utopia Instrument Co. Varian Instrument Div. The VirTis Co. VWR Scientific

volumetric

ION EXCHANGE CRYSTALS

Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. J. T. Baker Chemical Co. Corco Chemical Corp. Delta Scientific Corp. Fisher Scientific Co. The Foxboro Co. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. Harleco ITT Barton LaMotte Chemical Products Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Medical Chemical Corp. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Reliable Chemical Co. Research Appliance Co. Sircor Instruments Corp. G. Frederick Smith Chemical Co. Smith-Underwood Laboratories VWR Scientific

Bio-Rad Laboratories Fisher Scientific Co. Ion Exchange Products, Inc. lonac Chemical Co. LaPine Scientific Co. Nopco Chemical Div. Norton Co. (Mass) Reliable Chemical Co.

ION EXCHANGE CHEMICALS celluloses Applied Science Labs., Inc. J. T. Baker Chemical Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem Cyclo Chemical EM Laboratories, Inc. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals LaPine Scientific Co. Nutritional Biochemicals Pfaltz & Bauer, Inc. Pharmacia Fine Chemicals, Inc. Phipps & Bird, Inc. H. Reeve Angel & Co., Inc. Regis Chemical Co. Reliable Chemical Co. Schleicher & Schuell, Inc. Schwarz/Mann Sigma Chemical Co. Supelco, Inc. Utopia Instrument Co. VWR Scientific

resins Allied Chemical Corp. Amend Drug & Chemical Co., Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Betz Laboratories, Inc. Bio-Cal Instrument Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem CCM: Schaar Scientific, Inc. Corning Glass Works (Mass.) Crystalab, Inc. Culligan International Co. Cyclo Chemical E. I. du Pont de Nemours & Co., Inc. Durrum Chemical Corp. Durrum Instrument Corp. EM Laboratories, Inc. Carlo ErbaS.p.A., Chemicals Div. ICN Chemical & Radioisotope Div. Illinois Water Treatment Co. ion Exchange Products, Inc. lonac Chemical Co. Ionics, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Nopco Chemical Div. Pfaltz & Bauer, Inc. Pharmacia Fine Chemicals, Inc. Phipps & Bird, Inc. Pierce Chemical Co. Polysciences, Inc. Prolabo

ION SPECIFIC TEST PAPERS EM Laboratories, Inc. Carlo ErbaS.p.A., Chemicals Div. F & J Scientific

ISOTOPES, stable Atomergic Chemetals Co. Bio-Rad Laboratories Diaprep, Inc. General Electric Co. ICN Chemical & Radioisotope Div. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/Nuclear Merck Sharp & Dohme Canada Ltd. Merck & Co., Inc. MG Scientific Gases Miles Labs., Inc., Research Div. New England Nuclear Nuclear Equipment Chemical Corp. PCR, Inc. Reactor Experiments, Inc. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Gas Products Inc. Stohler Isotope Chemicals, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Wilmad Glass Co., Inc.

KITS, chemical reaction kits (teaching) Achem Div. Alpha Associates Ames Co Calbiochem Camag, Inc. Chem Service, Inc. Chemical Samples Co. Corning Glass Works (N.Y.) Delta Scientific Corp. E. I. du Pont de Nemours & Co.. Inc. Gelman Instrument Co. General Kinetics Gould, Inc., Burgess Div. Hach Chemical Co. Harleco Hyland Interex Corp. Koslow Scientific Co. LaMotte Chemical Products Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Maurukas Co., Inc. Medical Chemical Corp. Nuclear Medical Systems, Inc. Ohaus Scale Corp. Pharmacia Fine Chemicals, Inc. Phase Separations Ltd. Phy-Lab Polysciences, Inc. Quantum Industries Regis Chemical Co. Research Appliance Co. Science Related Materials, Inc. Sigma Chemical Co. Smith-Underwood Laboratories Supelco, Inc. Wilson Diagnostics, Inc.

LABORATORY GUIDE

LABELED OR TAGGED ORGANIC COMPOUNDS POWDERS, SPECTROSCOPIC LABELED OR TAGGED ORGANIC COMPOUNDS isotopes (radioactive, low level and high level radioactive)

m

es υ

Ε

Φ

δ

3

AIRCO Industrial Gases Amersham/Searle Corp. Ames Co. Atomic Energy of Canada Ltd. Calbiochem Canrad Precision Industries, Inc. Eberline Instrument Corp. The Harshaw Chemical Co. High Voltage Engineering Corp. ICN Chemical & Radioisotope Div. Isolab, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/Nuclear Matheson Gas Products MC/B Manufacturing Chemists Miles Labs., Inc., Research Div. New England Nuclear Nuclear Associates, Inc. Nuclear Equipment Chemical Corp. Nuclear Medical Systems, Inc. Nucleonic Corp. of America ORTEC Incorporated Packard Instrument Co., Inc. PCR, Inc. Schwarz/Mann Scientific Gas Products Inc. Spectrum Medical Industries, Inc. Stonier Isotope Chemicals, Inc.

radioactive compounds Amersham/Searle Corp. Ames Co. AMETEK/Calmec Applied Science Labs., Inc. Calbiochem Canrad Precision Industries, inc. Eberline Instrument Corp. ICN Chemical & Radioisotope Div. Isolab, Inc. Johnston Laboratories, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/Nuclear Matheson Gas Products MG Scientific Gases Miles Labs., Inc., Research Div. New England Nuclear Nuclear Equipment Chemical Corp. Nuclear Medical Systems, Inc. Nucleonic Corp. of America Packard Instrument Co.. Inc. Schwarz/Mann Spectrum Medical Industries, Inc. Worthington Biochemical Corp.

LIQUID CRYSTALS Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Pressure Chemical Co.

MAGNETIC ALLOYS, ultra-high purity Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. Carpenter Technology Corp. Columbia Superconductor and Cryogenics Co., Inc. Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Imanco-Metals Research LaPine Scientific Co. Materials Research Corp. Reliable Chemical Co. Research Chemicals Rocky Mountain Research, Inc. VAR-LAC-OID Chemical Co.

METAL FOIL Allied Chemical Corp. Aluminum Company of America Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Carpenter Technology Corp.

264 LG AUGUST 1973

City Chemical Corp. Electronic Space Products, Inc. Fairmount Chemical Co.. Inc. D. F. Goldsmith Chemical & Metal Corp. Goodfeilow Metals Ltd. Greiner Scientific Corp. Hruden Laboratory Products Hy-Sii Mfg. Co. Imanco-Metals Research Kawecki Berylco Industries. Inc. Materials Research Corp. Matthey Bishop, Inc. MC/B Manufacturing Chemists Ney Metals, Inc. Nuclear Equipment Chemical Corp. Nuclear Materials & Equipment Corp. PCR, Inc. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Polysciences, Inc. Pro I a bo Reactor Experiments, Inc. Reliable Chemical Co. Research Chemicals Semi-Elements, Inc. Texas Instruments, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products

METALS, high purity — see also rare earth metals Aluminum Company of America Alusuisse Metals Inc. Amend Drug & Chemical Co., Inc. American Smelting & Refining Co. Anachemta Chemicals, Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. Bethlehem Apparatus Co., Inc. Carpenter Technology Corp. Cerac, Inc. City Chemical Corp. Eagle-Picher Industries, Inc. Electronic Space Products, Inc. Engineered Materials Fairmount Chemical Co., Inc. Glidden-Durkee D. F. Goldsmith Chemical & Metal Corp. Goldsmith Precious Metals Div. Goodfeilow Metals Ltd. M. W. Hardy & Co., Inc. Henley & Co., Inc. Hruden Laboratory Products ICN-K&KLabs., Inc. Imanco-Metals Research Jarrell-Ash Div. Kawecki Berylco Industries, Inc. Morris P. Kirk & Sons, Inc. LaPine Scientific Co. Lithium Corp. of America Materials Research Corp. Michigan Chemical Corp. Mine Safety Appliances Co. MSA Research Corp. Ney Metals, Inc. Ν L Industries, Inc., Metal Div. Ν L Industries, Inc., Nuclear Div. Nuclear Equipment Chemical Corp. Nuclear Materials & Equipment Corp. PCR. Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phy-Lab Pioneer Aluminum. Inc. Polysciences, Inc. Pro! a bo Reactor Experiments. Inc. Reliable Chemical Co. Research Chemicals Research Organic/Inorganic Chemical Corp. Rocky Mountain Research. Inc. Ronson Metals Corp. Scientific Gas Products Inc. Semi-Elements, Inc. Spex Industries, Inc. Titanium Metal Corp. of America United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp,, Alfa Products Ventron Corp,, Chemicals Div.

METALS, refractory Alusuisse Metals Inc. Apache Chemicals. Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. Cerac, Inc. City Chemical Corp. Climax Molybdenum Co. Electronic Space Products, Inc. Engineered Materials Goodfeilow Metals Ltd. Hruden Laboratory Products

Imanco-Metals Research Kawecki Berylco Industries, Inc. Kennametal Inc. LaPine Scientific Co. Materials Research Corp. Norton Co., Metals Div. Nuclear Materials & Equipment Corp. PCR, Inc. Reactor Experiments, inc. Reliable Chemical Co. Research Chemicals Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Semi-Elements, Inc. Spex Industries, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products

METALS AND ALLOYS, precious Amend Drug & Chemical Co., Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. Cerac, Inc. City Chemical Corp. E. I. du Pont de Nemours & Co., Inc. Electronic Space Products, Inc. Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Engineered Materials D. F. Goldsmith Chemical & Metal Corp. Goldsmith Precious Metals Div. Goodfeilow Metals Ltd. Hruden Laboratory Products Imanco-Metals Research LaPine Scientific Co. Materials Research Corp. Matthey Bishop, Inc. MC/B Manufacturing Chemists PCR, Inc. Polysciences, Inc. Prolabo Reactor Experiments, Inc. Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. SAS Scientific Chemicals, Ltd. TheSel-RexCo. Semi-Elements, Inc. Spex Industries, Inc. Structure Probe, Inc. Texas Instruments, Inc. Tivian Laboratories, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co, Ventron Corp., Alfa Products

NITROGEN Airco, Inc. AIRCO Industrial Gases Air Products & Chemicals, Inc. J. T. Baker Chemical Co. Chem Service, Inc. Chemetron Corp., Industrial Gases ICN Chemical & Radioisotope Div. LaPine Scientific Co. Lif-O-Gen, Inc. Liquid Carbonic Corp. Marshallton Research Labs., Inc. Matheson Gas Products MG Scientific Gases Precision Gas Products, Inc. Reliable Chemical Co. Scientific Gas Products Inc. Scott Research Laboratories, Inc. Superior Air Products Co. United Mineral & Chemical Corp.

ORGANIC SYNTHESIS INTERMEDIATES Aero Chemical Corp. Aldrich Chemical Co., Inc. Allied Chemical Corp. The Ames Laboratories, Inc. Analabs, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Arapahoe Chemicals Ash Stevens Inc. Baker Castor Oil Co. J. T. Baker Chemical Co. Bodman Chemicals The Borden Chemical Co. Burdick & Jackson Labs., Inc. Carbolabs, Inc. Cationics, Inc. Chem Service, Inc. Chemical Samples Co. City Chemical Corp. Cyclo Chemical Detrex Chemical Industries, Inc. Eastern Chemical

Eastman Kodak Co., Eastman Organic Chemicals El Monte Chemical Co. EM Laboratories. Inc. Carlo ErbaS.p.A., Chemicals Div. Fairmount Chemical Co., inc. Farchan Div. Ferro Corp., Chemical Diy. Fine Organics, Inc. Fisher Scientific Co. FMC Corp., Organic & Inorganic Chemicals Div. Freeman Industries, Inc. Frinton Labs. GAF Corp., Chemical Div. General Biochemicals Hampshire Chemical M. W. Hardy & Co., Inc. The Humphrey Chemical Co. Hummel Chemical Co.. Inc. ICN Chemical & Radioisotope Div. ICN-K&KLabs., Inc. lonac Chemical Co. Krishell Laboratories, Inc. Lachat Chemicals, Inc. LaPine Scientific Co. M&T Chemicals Inc. Marshallton Research Labs., Inc. MC/B Manufacturing Chemists Michigan Chemical Corp. Miles Labs., Inc., Research Div. Mine Safety Appliances Co. MSA Research Corp. New Haven Chemical Corp. Nuclear Medical Systems, Inc. Nutritional Biochemicals Organomation Associates, Inc. Orgmet, Inc. PCR, Inc. Pennwalt Corp. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phillips Petroleum Co. Pierce Chemical Co. Polysciences, Inc. Regis Chemical Co. Reilly Tar & Chemical Corp. Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. RHO Chemical Co. Saber Labs., Inc. Schwarz/Mann Sherwin Williams Chemicals Specialty Organics, Inc. Stohler Isotope Chemicals, Inc. Strem Chemicals, Inc. Tenneco Chemicals, Inc. Union Carbide Corp., Chemicals & Plastics The Upjohn Co., Fine Chemical Marketing Ventron Corp., Alfa Products White Chemical Corp. WhittakerCorp. Willow Brook Laboratories, Inc. Winthrop Laboratories

ORGANOPHOSPHINES Bodman Chemicals Eastern Chemical Frinton Labs. M&T Chemicals Inc. Orgmet, Inc. PCR, Inc. Petrarch Systems Pfaltz & Bauer, Inc. Pressure Chemical Co. Specialty Organics, Inc. Willow Brook Laboratories, Inc.

POWDERS, spectroscopic Aluminum Company of America Apache Chemicals, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. City Chemical Corp. Electronic Space Products, Inc. EM Laboratories, Inc. F & J Scientific The Harshaw Chemical Co. Hruden Laboratory Products International Crystal Laboratories Jarrell-Ash Div. LaPine Scientific Co. Met-Bay, Inc. National Spectrographic Laboratories, Inc. Poco Graphite, Inc. Rank Precision Industries, Inc. Reliable Chemical Co. Spex Industries, Inc. Ultra Carbon Corp. United Mineral & Chemical Corp. Zeebac Inc.

LABORATORY GUIDE

PREPARED STANDARD SOLUTIONS REAGENTS PREPARED STANDARD SOLUTIONS (PRE-PACKED) chemicals

CO

υ "Ê

α> Ο

π

Ace Scientific Supply Co., Inc. Allied Chemical Corp. Alpha Associates Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs., Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Brinkmann Instruments, Inc. Chem Service, Inc. Chemical Data Systems, inc. City Chemical Corp. Coleman Instruments Colorado Serum Co. Corco Chemical Corp. Cudahy Labs. Delta Scientific Corp. E, I. du Pont de Nemours & Co., Inc. Durrum Instrument Corp. Eastern Chemical Carlo ErbaS.p.A.. Chemicals Div. Fisher Scientific Co. General Electric Co. Greiner Scientific Corp. Hach Chemical Co. Harleco Hellige, Inc. Hruden Laboratory Products Hyland ICN Chemical & Radioisotope Div. Isolab, Inc. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Materials Development Corp. Medical Chemical Corp. Nanogens Nuclear Médical Systems, Inc. Omega Chemical Corp. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Prolabo Rankin Reagent Co. Regis Chemical Co. Reliable Chemical Co. SAS Scientific Chemicals, Ltd. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. Technicon Instruments Corp. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. VWR Scientific

reagents Ace Scientific Supply Co., Inc. Allied Chemical Corp. Alpha Associates Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs., Inc. J. T. Baker Chemicat Co. Beckman Instruments, Inc. Betz Laboratories, Inc. Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem Chem Service, Inc. City Chemical Corp. Coleman Instruments Colorado Serum Co. Corco Chemicai Corp. Delta Scientific Corp. Dexter Biological Co. E. I. du Pont de Nemours & Co., Inc. Durrum Instrument Corp. Eastern Chemical Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Greiner Scientific Corp. Hach Chemical Co. Harleco Helena Laboratories Hellige, Inc. Hycel, Inc. Hyland ICN Chemical & Radioisotope Div. Instrumentation Laboratory inc. isolab. Inc. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co.

266 LG AUGUST 1973

Mallinckrodt Chemical Works, Science Products Div. Maurukas Co., inc. Medical Chemical Corp. Milton Roy Co. Nuclear Medical Systems, Inc. Ohio Valley Specialty Chemical Co. Omega Chemical Corp. Oxford Laboratories Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences. Inc. Prolabo Quantum Industries Rankin Reagent Co. Regis Chemical Co. Reheis Chemical Co. Reliable Chemical Co. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. G. Frederick Smith Chemical Co. Supelco, Inc. Technicon Instruments Corp. VAR-LAC-OID Chemical Co. VWR Scientific

Freeman Industries, Inc. General Biochemicals Harleco Hycei, Inc. ICN Chemicai & Radioisotope Div. LaPine Scientific Co. Miles Labs., Inc., Research Div. National Instrument Laboratories, Inc. Nuclear Medical Systems, Inc. Nutritional Biochemicals Pfaltz & Bauer, Inc. Pharmacia Fine Chemicals, Inc. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Reliable Chemical Co. SAS Scientific Chemicals, Ltd. Schwarz/Mann Sigma Chemical Co. Spectrum Medical Industries, Inc. Worthington Biochemical Corp.

solutions

Alusuisse Metals Inc. Amend Drug & Chemical Co., Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. Bodman Chemicals Carpenter Technology Corp. Cerac. Inc. City Chemical Corp. Eagle-Picher Industries. Inc. Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. Engineered Materials Fairmount Chemical Co., Inc. D. F. Goldsmith Chemical & Metal Corp. M. W. Hardy &Co., Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. ICN-K&KLabs.. Inc. imanco-Metals Research Jarrell-Ash Div. Kawecki Berylco Industries, Inc. LaPine Scientific Co. Materials Research Corp. MC/B Manufacturing Chemists Michigan Chemical Corp. Ney Metals, Inc. Ozark-Mahoning Co. PCR, Inc. Pfaltz & Bauer. Inc. Pierce Chemical Co. Polysciences, Inc. Reactor Experiments, Inc. Reliable Chemical Co. Research Chemicals Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Ronson Metals Corp. SAS Scientific Chemicals, Ltd. Spex Industries, Inc. Stohler Isotope Chemicals, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products Ventron Corp., Chemicals Div. Willow Brook Laboratories, Inc.

Ace Scientific Supply Co., Inc. Allied Chemical Corp. Alpha Associates Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories. Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs., Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Betz Laboratories. Inc. Bio-Med-Chem Co. Bio-Rad Laboratories Brinkmann Instruments. Inc. Central Plastics Distributors Co. Central Scientific Co. Chem Service, Inc. City Chemical Corp. Coleman Instruments Colorado Serum Co. Corco Chemical Corp. Curtin Scientific Co. Delta Scientific Corp. Dexter Biological Co. Duke Standards Co. Durrum Chemical Corp. Eastern Chemical EM Laboratories, Inc. Carlo ErbaS.p.A., Chemicals Div. F & J Scientific Fisher Scientific Co. Greiner Scientific Corp. Hach Chemical Co. Harleco R.J. Harvey Instrument Corp. Hellige, Inc. Hyland ICN Chemical & Radioisotope Div. Instrumentation Laboratory Inc. Isolab, Inc. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. The London Co. Mallinckrodt Chemical Works. Science Products Div. Materials Development Corp. Medical Chemicai Corp. Nanogens National Spectrographic Laboratories, Inc. Nuclear Medical Systems. Inc. Omega Chemical Corp. Orion Research Inc. Packard Instrument Co., Inc. Pfaltz & Bauer. Inc. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Prolabo Rankin Reagent Co. Regis Chemical Co. Reliable Chemical Co. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. Spectro Products, Inc. Spex Industries, Inc. Technicon Instruments Corp. Varian Instrument Div. VWR Scientific WATCON, Inc.

PROTEINS Bodman Chemicals Cudahy Labs. Eastman Kodak Co., Eastman Organic Chemicals

RARE EARTH METALS AND COMPOUNDS — see also metals, high purity

REAGENTS general ABBOTT, Scientific Products Div. Accron Industries, Inc. Achem Div. Aldrich Chemical Co., Inc. Allied Chemical Corp. Alpha Associates Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Atlantic Equipment Engineers J. T. Baker Chemical Co. Beckman Instruments, Inc. Biopolymers Laboratory of General Biochemicals Brinkmann Instruments, Inc. Camag, Inc. Carbolabs, Inc. Cationics, inc. Central Scientific Co. Chem Service, Inc. Chemical Samples Co. City Chemical Corp. Colorado Serum Co. Corco Chemical Corp. Cyclo Chemical Delta Scientific Corp.

E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fielding Chemical Co. Fisher Scientific Co. Frinton Labs. Gallard-Schlesinger Chemical Mfg. Corp. Grand Island Biological Co. Hach Chemical Co. TheC. P. Hall Co. of Illinois Harleco Heico, Inc. Hycel, Inc. ICN Chemical & Radioisotope Div. Instrumentation Laboratory Inc. Lachat Chemicals, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Materials Research Corp. MC/B Manufacturing Chemists Nuclear Medical Systems, Inc. Nutritional Biochemicals Omega Chemical Corp. PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Prolabo Rankin Reagent Co. Reliable Chemical Co. Rocky Mountain Research, Inc. R S A Corp. Scientific Products Semi-Elements, Inc. Sigma Chemical Co. G. Frederick Smith Chemical Co. Arthur H. Thomas Co. Thompson Hayward Chemical Co. VAR-LAC-OID Chemical Co. VWR Scientific

amino acid Aldrich Chemical Co., Inc. Amend Drug & Chemical Co., Inc. Analabs, Inc. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, inc. Bio-Cal Instrument Co. Biopolymers Laboratory of General Biochemicals Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem Chem Service, Inc. City Chemical Corp. Cyclo Chemical E. I. du Pont de Nemours & Co., Inc. Durrum Chemical Corp. Durrum Instrument Corp. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Freeman Industries, Inc. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals Grand Island Biological Co. Hampshire Chemical Helena Laboratories Henley & Co., Inc. ICN Chemical & Radioisotope Div. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Microbiological Associates, Inc. Miles Labs., Inc., Research Div. Nuclear Medical Systems, Inc. Nutritional Biochemicals Packard Instrument Co., Inc. Pfaltz & Bauer, Inc. Pfanstiehl Labs, Inc. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. P-L Biochemicals. Inc. Polysciences, Inc. Prolabo Regis Chemical Co. Reliable Chemical Co. RHO Chemical Co. SAS Scientific Chemicals, Ltd. Schwarz/Mann Sigma Chemical Co. Supelco, Inc. Technicon Instruments Corp. Utopia Instrument Co.

analytical Achem Div. Aldrich Chemical Co., Inc

LABORATORY GUIDE

REAGENTS

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Allied Chemical Corp. Alpha Associates Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs., Inc. Atlantic Equipment Engineers J. T. Baker Chemical Co. Barnebey-Cheney Beckman Instruments, Inc. Betz Laboratories, Inc. Brinkmann Instruments, Inc. Camag, Inc. Central Scientific Co. Chemical Samples Co. City Chemical Corp. Corco Chemical Corp. Coulter Electronics, Inc. Curtin Scientific Co. E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, inc. Carlo Erba S.p.A., Chemicals Div. F & J Scientific Fielding Chemical Co. Fisher Scientific Co. Frinton Labs. Gallard-Schlesinger Chemical Mfg. Corp. General Bicchemicals Hach Chem.cal Co. Harleco Hruden Laboratory Products Hycel, Inc. ICN Chemical & Radioisotope Div. ICN-K&KLabs., Inc. Instrumentation Laboratory Inc. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. The London Co. Mallinckrodt Chemical Works, Science Products Div. M&T Chemicals Inc. Materials Research Corp. MC/B Manufacturing Chemists Medical Chemical Corp. Miles Labs., Inc., Research Div. Nanogens Ohio Valley Specialty Chemical Co. Oxford Laboratories PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. PolyScience Corp. Polysciences, Inc. Princeton Organics, Inc. Prolabo Quantum Industries Rankin Reagent Co. Regis Chemical Co. Reliable Chemical Co. Rocky Mountain Research, Inc. RS A Corp. SAS Scientific Chemicals. Ltd. Scientific Gas Products Inc. Scientific Products Semi-Elements, Inc. Sigma Chemical Co. G. Frederick Smith Chemical Co. Smith-Underwood Laboratories Supelco, Inc. Technicon Instruments Corp. VAR-LAC-OID Chemical Co. VWR Scientific

calorimetric ABBOTT, Scientific Products Div. Allied Chemical Corp. ' J. T. Baker Chemical Co. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Maurukas Co., Inc. Omega Chemical Corp. Parr Instrument Co. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Princeton Organics, Inc. Prolabo Reliable Chemical Co. Scientific Gas Products Inc. Sigma Chemical Co. Volu-Sol Chemical & Manufacturing Co. VWR Scientific

electronic grade Allied Chemical Corp. Amend Drug & Chemical Co., Inc.

268 LG AUGUST 1973

Anachemia Chemicals, Inc. Apache Chemicals, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Brinkmann Instruments, Inc. City Chemical Corp. Corco Chemical Corp. E. I. du Pont de Nemours & Co., Inc. EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Harleco Hruden Laboratory Products Lachat Chemicals, Inc. Mallinckrodt Chemical Works, Science Products Div. Materials Research Corp. PCR, Inc. Pfaltz & Bauer, Inc. Phy-Lab Polysciences, Inc. Precision Gas Products, Inc. Princeton Organics, Inc. Prolabo Reliable Chemical Co. Rocky Mountain Research, inc. Scientific Gas Products Inc. Semi-Elements, Inc. Thompson Hayward Chemical Co. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. VWR Scientific

enzymatic ABBOTT, Scientific Products Div. American Monitor Corp. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Biopolymers Laboratory of General Biochemicals Boehringer Mannheim Corp. The Borden Chemical Co. Brinkmann Instruments, Inc. Calbiochem Coulter Electronics, Inc. Cudahy Labs. Cyclo Chemical EM Laboratories, Inc. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Gelman Instrument Co. General Biochemicals Grand Island Biological Co. Harleco Helena Laboratories Henley & Co., Inc. Hruden Laboratory Products Hycel, Inc. Hyland ICN Chemical & Radioisotope Div. Isolab, Inc. LaPine Scientific Co. Maurukas Co., Inc. Miles Labs., Inc., Research Div. Nutritional Biochemicals Pfaltz & Bauer, Inc. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. P-L Biochemicals, Inc. Polysciences, Inc. Princeton BlOMEDIX Inc. Regis Chemical Co. Reheis Chemical Co. Reliable Chemical Co. R S A Corp. Schwarz/Mann Scientific Products Sigma Chemical Co. Technicon Instruments Corp. VWR Scientific Worthington Biochemical Corp.

histological Allied Chemical Corp. Alpha Associates Amend Drug & Chemical Co., Inc. Andor Chemical Corp. J. T. Baker Chemical Co. The Borden Chemical Co. Calbiochem City Chemical Corp. Corco Chemical Corp. Curtin Scientific Co. Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Gam Rad, Inc. Harleco Hyland LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Medical Chemical Corp.

Miles Labs., Inc., Research Div. National Instrument Laboratories, Inc. Nutritional Biochemicals Omega Chemical Corp. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Reliable Chemical Co. Scientific Products Sigma Chemical Co Sircor Instruments Corp. Technicon Instruments Corp. Volu-Sol Chemical & Manufacturing Co. VWR Scientific

inorganic Accron Industries, Inc. Allied Chemical Corp. Alpha Analytical Labs. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Brinkmann Instruments. Inc. Chem Service. Inc. City Chemical Corp. Corco Chemical Corp. Curtin Scientific Co. Electronic Space Products, Inc EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fielding Chemical Co. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Harleco Heico, Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Ozark-Mahoning Co. PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Polysciences, Inc. Prolabo Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Scientific Gas Products inc. Scientific Products Semi-Elements, Inc. G. Frederick Smith Chemical Co. Smith-Underwood Laboratories Strem Chemicals. Inc. Technicon Instruments Corp. Thompson Hayward Chemical Co. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products Ventron Corp., Chemicals Div. VWR Scientific

mercury analysis Alpha Analytical Labs. J. T. Baker Chemical Co. Barnebey-Cheney Coleman Instruments Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals F & J Scientific Fielding Chemical Co. Hach Chemical Co. Harleco Hruden Laboratory Products Koslow Scientific Co. Pfaltz & Bauer, Inc.

microscopy Allied Chemical Corp. J. T. Baker Chemical Co. The Borden Chemical Co. Brinkmann Instruments, Inc. R. P.CargilleLabs., Inc. Eastern Chemical EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Harleco ICN Chemical & Radioisotope Div. MC/B Manufacturing Chemists Medical Chemical Corp. Miles Labs., Inc., Research Div. PCR. Inc. Pfaltz 8. Bauer. Inc. Phipps & Bird, Inc.

Phy-Lab Polysciences, Inc. Reliable Chemical Co. Scientific Products Sircor Instruments Corp. Structure Probe, Inc. VAR-LAC-OI D Chemical Co. Ventron Corp.. Alfa Products VWR Scientific

moisture determining Ace Scientific Supply Co., Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Andor Chemical Corp. J. T. Baker Chemical Co. Beckman Instruments, Inc. R. P. Cargille Labs.. Inc. Corco Chemical Corp. Harry W. Dietert Co. EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Harleco LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Pfaltz & Bauer. Inc. Phipps & Bird, Inc. Phy-Lab Reliable Chemical Co. Scientific Gas Products Inc. Scientific Products G. Frederick Smith Chemical Co. Arthur H. Thomas Co. VWR Scientific

organic metal Achem Div. Aldrich Chemical Co., Inc. Allied Chemical Corp. Anderson Development Co. Andor Chemical Corp. Apache Chemicals, Inc. J. T. Baker Chemical Co. Camag, Inc. City Chemical Corp. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Fairmount Chemical Co., Inc. F& J Scientific Fisher Scientific Co. Frinton Labs. ICN Chemical & Radioisotope Div. ICN-K&KLabs., Inc. Kings Laboratories LaMont Laboratories LaMotte Chemical Products Co. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Ohio Valley Specialty Chemical Co. Orgmet, Inc. PCR, Inc. Pfaltz & Bauer, Inc. Phy-Lab Polysciences, Inc. Prolabo Reliable Chemical Co. Research Organic/Inorganic Chemical Corp Scientific Gas Products Inc. Strem Chemicals, Inc. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products Ventron Corp., Chemicals Div. VWR Scientific

water analysis Ace Scientific Supply Co., Inc. Achem Div. Allied Chemical Corp. Alpha Analytical Labs. Alpha Associates Anachemia Chemicals, Inc. Analabs, inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. J T. Baker Chemical Co. Betz Laboratories, Inc. Camag, inc. Central Scientific Co. City Chemical Corp. Corco Chemical Corp. Corning Glass Works (Mass.) Curtin Scientific Co. Delta Scientific Corp. Eastern Chemical Carlo ErbaS.p.A., Chemicals Div. Fielding Chemical Co.

LABORATORY

GUIDE

REAGENTS SOLVENTS Fisher Scientific Co. Hach Chemical Co. Harleco Hellige, Inc. Hycel, Inc.

Interex Corp.

Koslow Scientific Co. LaMont Laboratories LaMotte Chemical Products Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Medical Chemical Corp. Milton Roy Co. Omega Chemical Corp. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Precision Gas Products, Inc. Prolabo Rankin Reagent Co. Reliable Chemical Co. Research Appliance Co. Scientific Products G. Frederick Smith Chemical Co. Technicon Instruments Corp. Vulcan Laboratories, Inc. VWR Scientific WATCON, Inc.

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REAGENTS FOR MICROCOMBUSTION AND MICROANALYSIS

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Allied Chemical Corp. J. T. Baker Chemical Co. Brinkmann Instruments, Inc. Chem Service, Inc. Chemical Data Systems, Inc. Cudahy Labs. Carlo Erba S.p.A,, Chemicals Div. Greiner Scientific Corp. Harfeco Hruden Laboratory Products Hyland LaPine Scientific Co. Phase Separations Ltd. Phy-Lab Princeton Organics, Inc. Reliable Chemical Co. Scientific Products Technicon Instruments Corp. Arthur H. Thomas Co.

microcombustion Allied Chemical Corp. J. T. Baker Chemical Co. Chemical Data Systems, Inc. Greiner Scientific Corp. LaPine Scientific Co. Phy-Lab Princeton Organics, înc. Prolabo Arthur H. Thomas Co.

REAGENTS FOR QUALITATIVE ANALYSIS general test papers Amend Drug & Chemical Co., Inc. American Gas & Chemicals, Inc. Ames Co. Anachemia Chemicals, Inc. J. T. Baker Chemical Co. City Chemical Corp. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. Harfeco Koslow Scientific Co. LaMotte Chemical Products Co. LaPine Scientific Co. Phipps & Bird, Inc. Phy-Lab Prolabo VWR Scientific

spot test Ace Scientific Supply Co., Inc. Aldrich Chemical Co., Inc. J. T. Baker Chemical Co. Betz Laboratories. Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Carlo ErbaS.p.A., Chemicals Div. Fielding Chemical Co, Gallard-Schlesinger Chemical Mfg. Corp.

270 LG AUGUST 1973

Greiner Scientific Corp. Koslow Scientific Co. LaMotte Chemical Products Co. LaPine Scientific Co. Phy-Lab Research Appliance Co. VWR Scientific

REAGENTS FOR QUANTITATIVE ANALYSIS Achem Div. Aldrich Chemical Co., Inc. Allied Chemical Corp. Alpha Analytical Labs. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Atomergic Chemetals Co. J. T. Baker Chemical Co. Burdick & Jackson Labs.. Inc. Camag, Inc. E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories. Inc. Carlo Erba S.p.A., Chemicals Div. Hach Chemical Co. Harleco Hruden Laboratory Products Hycel, Inc. Instrumentation Laboratory Inc. Lachat Chemicals, Inc. LaMont Laboratories LaPine Scientific Co. MC/B Manufacturing Chemists Medical Chemical Corp. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. Rankin Reagent Co. Reliable Chemical Co. Research Appliance Co. Scientific Products G. Frederick Smith Chemical Co. Smith-Underwood Laboratories Supefco, Inc. Technicon Instruments Corp. VAR-LAC-OID Chemical Co.

RESINS Allied Chemical Corp. Applied Plastics Co., Inc. Baker Castor Oil Co. J. T. Baker Chemical Co. The Borden Chemical Co. Cellomer Associates, Inc. DeBell & Richardson, Inc. Dow Corning Corp. E. I. du Pont de Nemours & Co., Inc. Harleco Hughes Aircraft Co. ICN Chemical & Radioisotope Div. lonac Chemical Co. LaPine Scientific Co. Lithium Corp. of America Pennsylvania Industrial Chemical Corp. Polysciences, Inc. Ram Chemicals Reliable Chemical Co. Schwarz/Mann Tenneco Chemicals, Inc. Union Carbide Corp., Chemicals & Plastics VWR Scientific Waters Associates Inc.

SOLUTIONS, pH buffer Allied Chemical Corp. Amend Drug & Chemical Co.. Inc. Anachemia Chemicals, Inc. Andor Chemical Corp. J. T. Baker Chemical Co. Beckman Instruments, Inc. Betz Laboratories, Inc. City Chemical Corp. Coleman Instruments Corco Chemical Corp. Corning Glass Works (N.Y.) Corning Glass Works (Mass.) Curtin Scientific Co. Difco Laboratories EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Hach Chemical Co. Harleco Hellige, Inc. ICN Chemical & Radioisotope Div. Imaginative Alchemy Unlimited Instrumentation Laboratory Inc. Kent Cambridge Instrument Co. LaMotte Chemical Products Co. Leeds & NorthrupCo.

The London Co. Mallinckrodt Chemical Works, Science Products Div. Markson Science, Inc. Matheson Scientific MC/B Manufacturing Chemists Nuclear Medical Systems, Inc. Omega Chemical Corp. Phipps & Bird, Inc. Photovolt Corp. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Rankin Reagent Co. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. Arthur H. Thomas Co. VWR Scientific

SOLVENTS deuterium Aldrich Chemical Co., Inc. J. T. Baker Chemical Co. Bro-Rad Laboratories Cationics, Inc. Cellomer Associates, Inc. Chemical Samples Co. City Chemical Corp. Diaprep, Inc. EM Laboratories, Inc. Carlo ErbaS.p.A., Chemicals Div. ICN Chemical & Radioisotope Div. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/Nuclear MC/B Manufacturing Chemists Merck Sharp & Dohme Canada Ltd.

See the J. 7. BAKER CHEMICAL CO. deuterium solvents ad on page 250 Merck & Co.. Inc. Nuclear Equipment Chemical Corp. Omega Chemical Corp. PCR, Inc. Phase Separations Ltd. SAS Scientific Chemicals, Ltd. Schwarz/Mann • Stohler Isotope Chemicals, Inc. Union Carbide Corp., Linde Div. Wilmad Glass Co., Inc.

extraction Accron Industries, Inc. Aldrich Chemical Co., Inc. Allied Chemical Corp. Anachemia Chemicals. Inc. J. T. Baker Chemical Co. City Chemical Corp. Carlo Erba S.p.A.. Chemicals Div. FMC Corp., Organic & Inorganic Chemicals Div. Harleco LaPine Scientific Co. MC/B Manufacturing Chemists Phillips Petroleum Co. Phy-Lab Pittsburgh Activated Carbon Div. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics VWR Scientific

Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Fisher Scientific Co. Harieco ICN Chemical & Radioisotope Div. Isolab, Inc. Lachat Chemicals, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MC/B Manufacturing Chemists Packard Instrument Co.. Inc. PCR, Inc. Pfaltz & Bauer, Inc. Phy-Lab Pierce Chemical Co. Pollard S Co. Polysciences. Inc. Prolabo Regis Chemical Co. Reliable Chemical Co. RHO Chemical Co. SAS Scientific Chemicals, Ltd. Sunshine Chemical Corp. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics Utopia Instrument Co. VWR Scientific Wilmad Glass Co., Inc.

spectrochemical Allied Chemical Corp. Alpha Analytical Labs. Anachemia Chemicals, Inc. Analabs, Inc. Apache Chemicals, Inc. J. T. Baker Chemical Co. Bodman Chemicals Burdick & Jackson Labs., Inc. City Chemical Corp. Eastman Kodak Co., Eastman Organic Chemicals ICN Chemical & Radioisotope Div. Isoiab, inc. LaPine Scientific Co. MC/B Manufacturing Chemists Pfaltz & Bauer, Inc. Phillips Petroleum Co. Phipps & Bird, Inc. Phy-Lab Prolabo Reliable Chemical Co. VAR-LAC-OID Chemical Co. VWR Scientific

spectrophotometry Aldrich Chemical Co., Inc. Allied Chemical Corp. Anachemia Chemicals. Inc. J. T. Baker Chemical Co. Beckman Instruments. Inc. Bodman Chemicals Burdick & Jackson Labs., Inc. Cationics, inc. Chem Service, Inc. City Chemical Corp. Corco Chemical Corp. Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A., Chemicals Div. Lachat Chemicals, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works. Science Products Div. MC/B Manufacturing Chemists Pfaltz & Bauer. Inc. Philljps Petroleum Co. Phipps & Bird. Inc. Phy-Lab Pierce Chemical Co. Pollard & Co.

high purity Accron Industries, Inc. Aldrich Chemical Co., Inc. Allied Chemical Corp. Alltech Associates, Inc. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Analtech, Inc. Andor Chemical Corp. Apache Chemicals. Inc. Applied Science Labs., Inc. J. T. Baker Chemical Co. Bodman Chemicals Burdick & Jackson Labs., Inc. Cationics, Inc. Chem Service, Inc. Chemical & Solvent Distillers Co.. Inc. City Chemical Corp. Corco Chemical Corp.

See the J. T. BAKER CHEMICAL CO. spectrophotometric solvents ad o n page 250

Prolabo Reliable Chemical Co. Sigma Chemical Co. G. Frederick Smith Chemical Co VWR Scientific

LABORATORY GUIDE

SOURCES, MOSSBAUER EFFECT STANDARDS SOURCES, Mossbauer effect G. F. Bush Associates ICN Chemical & Radioisotope Div. New England Nuclear

SOURCES, radiochemical Aerotest Operations Beckman Instruments, Inc. Eberline Instrument Carp. General Electric Co. General Electric Co., Nuclear Technology & Applications Operations ICN Chemical & Radioisotope Div. Interex Corp. LaPine Scientific Co. Monsanto Co. National Spectrographic Laboratories, Inc. New England Nuclear Nuclear Equipment Chemical Corp. Packard Instrument Co., Inc. Teledyne Isotopes (Caiif.)

STAINS, biological

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Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. AnachemtaChemicals, Inc. J. T, Baker Chemical Co. The Borden Chemical Co. Canalco, Inc. CCM: Schaar Scientific, Inc. Chem Service, Inc. City Chemical Corp. Colorado Serum Co. Difco Laboratories Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Engineered Materials Fielding Chemical Co. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Gam Rad, Inc. Grand Island Biological Co. Harleco LaPine Scientific Co. MC/B Manufacturing Chemists Medical Chemical Corp. Millipore Corp. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. Polysciences. Inc. Reliable Chemical Co. SAS Scientific Chemicals. Ltd. Schwarz/Mann Scientific Products Sigma Chemical Co. Sircor Instruments Corp. Technicon Instruments Corp. Volu-Sol Chemical & Manufacturing Co. VWR Scientific Wilson Diagnostics, Inc. Winthrop Laboratories

STANDARDS atomic absorption Ace Scientific Supply Co., Inc. Allied Chemical Corp. Alpha Analytical Labs. Apache Chemicals. Inc. ArRo Labs., Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Cannon Instrument Co, Corning Glass Works (Mass.) Easfman Kodak Co., Eastman Organic Chemicals EM Laboratories. Inc. Carlo ErbaS.p.A., Chemicals Div. F & J Scientific

S e e the J . T. BAKER CHEMICAL CO. A. A. s t a n d a r d s ad o n p a g e 250

Harleco Instrumentation Laboratory Inc. Jarrell-Ash Div.

272 LG AUGUST 1973

National Spectrographic Laboratories, Inc. Reliable Chemical Co. Scientific Products Spectro Products, Inc. Spex Industries, Inc. Varian Instrument Div. Ventron Corp., Alfa Products Westinghouse Electric Corp.

drug Applied Science Labs., Inc Harleco Regis Chemical Co. Scientific Products Supelco, Inc.

flame photometer Advanced Instruments, Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. ArRo Labs., Inc. J. T. Baker Chemical Co Beckman Instruments, Inc. Canalco, Inc. Coleman Instruments Corning Glass Works (Mass.) EM Laboratories, Inc. F & J Scientific Fisher Scientific Co. Harleco Hycel, Inc. Instrumentation Laboratory Inc. LaPine Scientific Co. The London Co. Medical Chemical Corp. National Instrument Laboratories, Inc. National Spectrographic Laboratories. Inc. Omega Chemical Corp. Phipps & Bird, Inc. Phy-Lab Rankin Reagent Co. Reliable Chemical Co. Scientific Products Sircor Instruments Corp. Stewart Laboratories, Inc. Technicon Instruments Corp. Utopia Instrument Co. VWR Scientific

herbicide Alpha Analytical Labs. Chem Service, Inc. City Chemical Corp. Duke Standards Co. Carlo Erba S.p.A.. Chemicals Div. Nanogens Pfaltz& Bauer, Inc. PolyScience Corp.

hormone Hycel, Inc. Isolab, Inc. Nutritional Biochemicals Pfaltz & Bauer, Inc. Reliable Chemical Co. Spectrum Medical Industries, Inc. Supelco, Inc.

hydrocarbon Alltech Associates, Inc. Analytical Instrument Development, Inc. Applied Science Labs., Inc. Chem Service, Inc. Duke Standards Co. Carlo Erba S.p.A.. Chemicals Div. Farchan Div. Lachat Chemicals, inc. MC/B Manufacturing Chemists Nanogens Nuclear Medical Systems, Inc. Packard Instrument Co., Inc. Pfaltz & Bauer. Inc. Phillips Petroleum Co. PolyScience Corp. Reliable Chemical Co. Scientific Gas Products Inc. Supelco, Inc.

insecticide Alltech Associates, Inc. Alpha Analytical Labs. Analabs, Inc. Applied Science Labs., Inc. Beckman Instruments, Inc. Chem Service, Inc. City Chemical Corp. Duke Standards Co."

E. I. du Pont de Nemours & Co., Inc. Carlo Erba S.p.A., Chemicals Div. Nanogens Phase Separations Ltd. PolyScience Corp. Regis Chemical Co. Supelco. Inc. Varian Instrument Div.

leak detector AIRCO Industrial Gases Alltech Associates, Inc. American Gas & Chemicals, Inc. DEVCO Engineering, Inc. E. I. du Pont de Nemours & Co., Inc. ICN Chemical & Radioisotope Div. LaPine Scientific Co. The Meriam Instrument Div. Research Appliance Co. Royco Instruments, Inc. Sunshine Scientific Tescom Corp. Turner Co. Vactronic Lab. Equipment, Inc. Varian Vacuum Div.

mercury analysis Alpha Analytical Labs. J. T. Baker Chemical Co. Coleman Instruments Corning Glass Works (Mass.) Eastman Kodak Co., Eastman Organic Chemicals F& J Scientific Harleco ICN Chemical & Radioisotope Div. Koslow Scientific Co. Sunshine Scientific

molecular weight, hydrogenated polybutadiene polymers

Medical Chemical Corp. Omega Chemical Corp. Phipps & Bird, Inc. Photovolt Corp. Phy-Lab Regis Chemical Co. Scientific Products Sircor Instruments Corp. Smith-Underwood Laboratories Arthur H. Thomas Co. VWR Scientific

primary reagent Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Andor Chemical Corp. J. T. Baker Chemical Co. City Chemical Corp. E. I. du Pont de Nemours & Co., Inc. Carlo ErbaS.p.A., Chemicals Div. Fisher Scientific Co. Hach Chemical Co. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. Materials Research Corp. Phase Separations Ltd. Phipps & Bird, Inc. Princeton Organics, Inc. Reliable Chemical Co. SAS Scientific Chemicals, Ltd. Scientific Products Sigma Chemical Co. G. Frederick Smith Chemical Co. Smith-Underwood Laboratories VWR Scientific

radiochemical

Amersham/Searle Corp Austin Science Associates, Inc. ICN Chemical & Radioisotope Div. New England Nuclear

Amersham/Searle Corp. Applied Science Labs., Inc. Beckman Instruments, Inc. Eberline Instrument Corp. General Electric Co. ICN Chemical & Radioisotope Div. Interex Corp. Intertechnique Instruments, Inc. Isolab, Inc. LaPine Scientific Co. Mallinckrodt/Nuclear New England Nuclear Nuclear Equipment Chemical Corp. Nuclear Medical Systems, Inc. Packard Instrument Co., Inc. Schwarz/Mann

pesticide

spectrochernical

Alpha Analytical Labs. Analabs, Inc. Applied Science Labs.. Inc. Beckman instruments, Inc. Chem Service, Inc. City Chemical Corp. E. I. du Pont de"Nemours & Co., Inc. Carlo ErbaS.p.A., Chemicals Div. Fisher Scientific Co. LaPine Scientific Co. Nanogens Packard Instrument Co.. Inc. Phase Separations Ltd. Phipps & Bird, Inc. PolyScience Corp. Regis Chemical Co. Supelco, Inc. Varian Instrument Div.

Allied Chemical Corp. Alpha Analytical Labs. Anachemia Chemicals, Inc. Angstrom, Inc. Applied Science Labs., Inc. Atlantic Equipment Engineers J. T. Baker Chemical Co. City Chemical Corp. Coleman Instruments F & J Scientific Fisher Scientific Co. Instrumentation Laboratory Inc. Jarrell-Ash Div. LaPine Scientific Co. Materials Research Corp. National Spectrographic Laboratories, Inc. PCR, Inc. Phillips Petroleum Co. Phipps & Bird, Inc. Rank Precision Industries, Inc. Reliable Chemical Co. Somar Labs., Inc, Spex Industries, Inc. Stewart Laboratories, Inc. Technicon Instruments Corp United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific

Duke Standards Co.

Mossbauer effect

PH Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Andor Chemical Corp. J. T. Baker Chemical Co. Beckman Instruments, Inc. Coleman Instruments Corning Glass Works (N.Y.) Corning Glass Works (Mass.) Delta Scientific Corp. Eastman Kodak Co.. Eastman Organi Chemicals Carlo ErbaS.p.A.. Chemicals Div. F & J Scientific Fisher Scientific Co. General Biochemicals Greiner Scientific Corp. Hach Chemical Co. Harleco Hellige, Inc. Instrumentation Laboratory Inc. Kent Cambridge Instrument Co. LaMotteChemical Products Co. LaPine Scientific Co. The London Co. Markson Science, Inc. MC/B Manufacturing Chemists

steroids Analabs, Inc. Applied Science Labs., Inc. Chem Service, Inc. Grand Island Biological Co. Hycel, Inc. Packard instrument Co., Inc. Pfaltz & Bauer, Inc Pierce Chemical Co. Reliable Chemical Co. Schwarz/Mann

LABORATORY GUIDE

STANDARDS TEMPERATURE INDICATING MARKERS water analysis Allied Chemical Corp. Alpha Analytical Labs. Analabs, Inc. Andor Chemical Corp. Baganoff Associates, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Corning Glass Works (Mass.) Cudahy Labs. Delta Scientific Corp. Fisher Scientific Co. Hach Chemical Co. Harleco Hellige, Inc. Kent Cambridge Instrument Co. LaMotte Chemical Products Co.

LaPine Scientific Co. MilliporeCorp. Milton Roy Co. Nuclear Medical Systems, Inc Omega Chemical Corp. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Precision Gas Products, Inc. Princeton Aqua Science Rankin Reagent Co. Royco Instruments, Inc. Scientific Products Technicon Instruments Corp. Varian Instrument Div. Vulcan Laboratories, Inc. VWR Scientific WATCON, Inc.

STATIONARY LIQUID PHASES Alltech Associates, Inc. Analabs, Inc. Analytical Instrument Development, Inc. Applied Science Labs., Inc. J. T. Baker Chemical Co. Eastman Kodak Co., Eastman Organic Chemicals Lachat Chemicals, Inc. LaPine Scientific Co. Ohio Valley Specialty Chemical Co. Perkin-Elmer, Ltd. Phase Separations Ltd. Pierce Chemical Co.

PolyScience Corp. Regis Chemical Co. The Separations Group Supelco, Inc. Varian Instrument Div. Waters Associates Inc.

TEMPERATURE INDICATING MARKERS Allied Chemical Corp. W. H. Brady Co. Phipps & Bird, Inc. Pressure Chemical Co. Scientific Products United Mineral & Chemical Corp.

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