W. Feldhoff & Comp. Arzneimittel seit 1928
W. Hawley & Son Limited
W.A. Hammond DRIERITE Co. Ltd
W.C. Heraeus GmbH, Chemicals Division
W.R. Grace & Co., Grace Davison Chemicals
W.R. Grace Italiana S.p.A.
Wacker Chemical Corporation
Wafer Technology Ltd. MCP Wafer Technolgy
Wajilam Exports (Singapore) Private Limited
Wako Chemicals USA, Inc.
Wala Incorporation
Walco Lin (Switzerland) Ltd.
Wall Chemie GmbH
Wallace Pharmaceuticals Ltd.
Walvis Bay Salt Refiners
Wardel Chemicals Ltd.
Warkem
Warren Chem Specialties CC
Warsaw University of Technology Lab of Technological Processes, Faculty of Chemistry
Warszawaskie Zaklady Przemyslu Nieorganicznego Stochem
Wasagchemie Sythen GmbH
Water Specialists Technologies LLC
Water Treatment Solutions Ltd.
Waterlink Sutcliffe Carbons
Watson Phillips y Cia. Sucs., S.A. de C.V.
Waxoils Private Limited
WdfPharma
We & You Aroma Chemicals
WEBAC Chemie GmbH
Weckerle GmbH & Co. KG Lackfabrik
Wefco Marketing
Wegscheider Farben GmbH & Co. KG
Weifa
Weifang Haihua Yuanda Fine Chemical Co., Ltd.
Weifang Ouchem Trade Co. Ltd.
Weifang Yaxing Chemical Group Corp.
Weihai New Era Chemical Co., Ltd.
Well-Done Chemical Co., Ltd.
Wellman International Ltd.
Wenzhou General Chemical Plant
Wenzhou Ouhua Foreign Trade Corporation
Wenzhou Weighten Chemical Co., Ltd.
Werner G. Smith, Inc.
Western Drugs Pvt. Ltd.
Western India Chemials
Westfalen Ag
Westfalen Aktiengesellschaft
Westrade Guatemala, S.A.
Wetzel GmbH & Co. Komm. Ges.
WhitChem Ltd.
The White Sea and Baltic Company Ltd.
White-Way Products
Whyte Chemicals Limited
Wieland
Wilfrid Smith Ltd.
Wilhelm E.H. Biesterfeld
William Blythe Ltd.
Wilshire Chemical Company, Inc
WIN Enterprises Trading Corp., Chemical Trading
Win Laboratories Limited
Win Medicare Limited
Winoil Chemie AG
Witco BV
Witco Mexico, S.A. de C.V.
Witega Laboratorien Berlin-Adlershof GmbH
Witney Chemical (Pty) Ltd.
Witton Chemical Co. Ltd.
Wockhardt Limited
Wolff Cellulosics GmbH & Co. KG
Wolskie Zaklady Przemyslu Barwnikow Organika
Worlee-Chemie GmbH
Worthington Biochemical Corp.
WSH Chemical Supplier Co., Ltd.
Wuhai Chemical Plant
Wuhan Bright Trading Co., Ltd.
Wuhan CTE Technos Development Inc.
Wuhan Fengfan Chemical Co., Ltd.
Wuhan Gehua Industrial Group Corp.
Wuhan Grand Pharma Group Co., Ltd.
Wuhan Hanhong Chemical Plant
Wuhan Inorganic Salt Chemical Plant
Wuhan Youji Industries Co. Ltd
Wuhan Yuancheng Tech. Dev. Co., Ltd.
Wujiang Perfume Plant
Wujin Linchuan Chemical Factory, S&M Department
Wujin Zhenhua Chemical Plant
Wuxi Chemical Industry Group Company, Ltd.
Wuxi Dazhong Chemical Industry Co., Ltd.
Wuxi Electrochemical Plant
Wuxi Joyray Imp. & Exp. (Group) Corporation
Wuxi Sulfuric Acid Factory
Wyandotte de Venezuela, C.A.
Wychem Limited
Wyn de Mexico Productos Quimicos SA de CV