Key Players
- Akzo Nobel NV
- Cabot Corporation
- RAG-Stiftung
- MLA Group of Industries
- Madhu Silica Pvt. Ltd
- Nalco Holding Company
- PPG Industries
- PQ Corporation
- PT Darisa Intimitra
- Qingdao Makall Group Inc
- Solvay S.A.
- Tata Chemicals Ltd
- Tosoh Silica Corporation
- W. R. Grace & Co
- Wacker Chemie AG
