1. Albemarle Corporation
2. Anten Chemical Co. Ltd.
3. Arkema S.A.
4. Ashok Mineral Enterprises
5. BASF SE
6. Chemiewerk Bad K?stritz GmbH
7. Clariant AG
8. Ecovyst Inc.
9. Honeywell International Inc.
10. Industrias Qu?micas del Ebro
S.A.
11. KNT Group
12. Manek Group
13. Merck KGaA
14. National Aluminium Company Limited
15. Noelson Chemicals
16. Nouryon Chemicals Holding B.V.
17. PQ Corporation
18. Shijiazhuang Huabang Imp.&Exp. Trade Co. Ltd.
19. Sorbead India
20. Tosoh Corporation
21. W. R. Grace & Company by Standard Industries Inc.
22. Zeochem AG
23. Zeolyst International
24. ZR Catalyst Co. Ltd.