Occidental Petroleum Corporation (U.S.)
Evonik Industries (Germany)
CIECH Group (Poland)
Silmaco NV (Belgium)
Oriental Silicas Corporation (Taiwan)
PQ Corporation (U.S.)
Nippon Chemical Industrial CO.LTD (Japan)
Kiran Global Chem Limited (India)
Ankit Silicates (India)
BASF SE (Germany)