| Aesica Pharmaceuticals Ltd |
| Akcros Chemicals Limited |
| Albemarle Chemicals UK Ltd |
| Archimica Ltd |
| Arizona Chemical Limited |
| Arkema Ltd |
| AstraZeneca UK Ltd |
| Baker Hughes |
| Bakhu Pharma Limited |
| Basell Polyolefins UK Ltd |
| BASF plc |
| Bayer CropScience Limited |
| Bayer plc |
| Bitrez Ltd |
| Bluestar Silicones (UK) Ltd |
Brenntag UK Limited
Briar Chemicals |
| Brotherton Esseco Ltd |
| CalaChem Ltd |
| Celanese Acetate Limited |
| Chemoxy International Limited |
| Chemson Ltd |
| Chemtura Europe Limited |
| Chemviron Carbon Limited |
| Clariant Services UK Ltd |
| Contract Chemicals Limited |
| Covidien |
| Croda International plc |
| Custom Powders Limited |
Dow Chemical Company Limited
Dow Corning Limited
Dynea UK Ltd
| Eastman Chemical Workington Ltd |
| Eli Lilly and Company Limited |
| EPC-UK Additives |
| Essar Oil (UK) Limited |
| Evonik Goldschmidt UK Ltd |
| ExxonMobil Chemical Limited |
| ExxonMobil Chemical Ltd |
Fine Organics Limited
FMC Chemicals Ltd
Frutarom (UK) Ltd
FUJIFILM Imaging Colorants Ltd
| GEO Specialty Chemicals |
| GlaxoSmithKline |
| GrowHow UK Limited |
Huntsman Corporation Europe
| Indorama Polymers Workington Limited |
| INEOS Chemicals Grangemouth Limited |
| INEOS ChlorVinyls |
| INEOS Newton Aycliffe Ltd |
| INEOS Nitriles Ltd |
| Infineum International Ltd |
| Innospec |
| Innovia Films Ltd |
| ISP (Great Britain) Co Ltd |
James M. Brown Ltd
Johnson Matthey plc
| Kemira Chemicals (UK) Limited |
| Koppers UK Limited |
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| Lanxess Limited |
| Lotte Chemical UK Ltd |
| Lubrizol Ltd |
| Lucite International UK Ltd |
| Macfarlan Smith Ltd |
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| MEL Chemicals |
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| Merisol UK Ltd |
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| Mexichem UK Limited |
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| Millennium Inorganic Chemicals Inc. A Cristal Company |
| Momentive Specialty Chemicals UK Limited |
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| Nalco Ltd |
| Nanoco Technologies Ltd. |
| Norit (UK) Limited |
| Novartis Grimsby Limited |
| Nufarm Limited |
Nufarm UK Limited
Nynas UK
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Oxford Catalysts Limited
| Pentagon Chemicals (Holdings) Ltd |
| Perstorp UK Ltd |
| Petrochem Carless Ltd |
| Polimeri Europa UK Ltd |
| PQ Silicas Limited |
| Prosynth Ltd |
| Red Industries Limited |
| Rhodia UK Ltd |
| Rio Tinto Minerals |
| Robinson Brothers Limited |
| Rockwood Specialities Ltd |
| SABIC UK Petrochemicals |
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| Shasun Pharma Solutions Limited |
| Shell Chemicals UK Limited |
| SI Group UK Ltd |
| Sigma-Aldrich Company Ltd |
| Silberline Ltd |
| Solutia UK Ltd |
| Solvay Chemicals Limited |
| Stepan UK Limited |
| Syngenta |
| Synthite Limited |
| Tata Chemicals Europe |
| Tennants Fine Chemicals Ltd |
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| Thermphos UK Ltd |
| Thomas Swan & Co Ltd |
| Total Petrochemicals UK Ltd |
| Tradebe Solvent Recycling Ltd |
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| UOP Limited |
| Urenco Chemplants |
| Veolia ES (UK) Ltd |
| Vertellus Specialities UK Ltd |
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| Witton Chemical Company Limited |
Yule Catto & Co plc
Zeon Chemicals Europe Limited
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