Aceto Corp.

Air Products And Chemicals, Inc.

Airgas, Inc.

Akzo Nobel N.V.

Albemarle Corporation

Alliedsignal Inc.

American Vanguard Corporation

Arch Chemicals, Inc.

Arco Chemical Company

Asahi Denka Kogyo Kk

Atanor S.A.

Avantium Technologies BV

Avecia Group Plc

Baker Hughes Incorporated

Balchem Corporation

Basf Aktiengesellschaft

Betz Laboratories, Inc.

Boc Group Plc

Brenntag AG

Burmah Castrol PLC

Cabot Corporation

Calgon Carbon Corporation

Caliper Life Sciences, Inc.

Cambrex Corporation

Catalytica Energy Systems, Inc.

Celanese Mexicana, S.A. De C.V.

Chemi-Trol Chemical Co.

Church & Dwight Co., Inc.

Croda International Plc

Crompton Corporation

Csk Auto Corporation

Cytec Industries Inc.

DeKalb Genetics Corporation

Degussa-Hüls AG

Dionex Corporation

Dsm N.V.

Dynaction S.A.

E.I. Du Pont De Nemours & Company

ERLY Industries Inc.

Ecolab Inc.

Elementis plc

English China Clays Ltd.

English China Clays Plc

Enterprise Rent A Car Company

Equistar Chemicals, LP

Ercros S.A.

Firmenich International S.A.

Formosa Plastics Corporation

Fort James Corporation

Georgia Gulf Corporation

Givaudan Sa

Great Lakes Chemical Corporation

Guerbet Group

H.B. Fuller Company

Hawkins Chemical, Inc.

Henkel Kgaa

Hercules Inc.

Hoechst A.G.

Hoechst Celanese Corporation

Imperial Chemical Industries Plc

International Flavors & Fragrances Inc.

Israel Chemicals Ltd.

Kemira Oyj

Koppers Industries, Inc.

L'Air Liquide SA

Lawter International Inc.

LeaRonal, Inc.

Loctite Corporation

Lonza Group Ltd.

Lyondell Chemical Company

MacDermid Incorporated

Mallinckrodt Group Inc.

Mbc Holding Company

Melamine Chemicals, Inc.

Methanex Corporation

Mississippi Chemical Corporation

Mitsubishi Chemical Corporation

Mitsui Petrochemical Industries, Ltd.

Monsanto Company

Morton International, Inc.

NL Industries, Inc.

NOF Corporation

Nalco Chemical Corporation

National Sanitary Supply Co.

National Starch And Chemical Company

Nisshin Seifun Group Inc.

Nobel Industries Ab

Norsk Hydro Asa

Novacor Chemicals Ltd.

OM Group, Inc.

OMNOVA Solutions Inc.

Olin Corporation

Penford Corporation

Perstorp AB

Petrolite Corporation

Praxair, Inc.

RPM, Inc.

Reichhold Chemicals, Inc.

Renner Herrmann S.A.

Rhodia Sa

Rhône-Poulenc S.A.

Robertet SA

Rohm And Haas Company

Rwe Ag

Scp Pool Corporation

Sequa Corp.

Shanghai Petrochemical Co., Ltd.

Sigma Aldrich Corporation

Solutia Inc.

Solvay & Cie S.A.

Solvay S.A.

Stepan Company

Sterling Chemicals, Inc.

Takeda Chemical Industries, Ltd.

Terra Industries, Inc.

Tessenderlo Group

Teva Pharmaceutical Industries Ltd.

The BFGoodrich Company

The Clorox Company

The Dexter Corporation

The Dow Chemical Company

The General Chemical Group Inc.

The Lubrizol Corporation

The Scotts Company

The Valspar Corporation

Total Fina Elf S.A.

Total S.A.

Ube Industries, Ltd.

Union Carbide Corporation

United Industries Corporation

Univar Corporation

Yule Catto & Company Plc

Zeneca Group PLC