Aditya Birla Group, is engaged in the production of five major product categories, namely, chlor-alkali, epichlorohydrin, epoxy resins, phosphates and sulphites. Four separate chemical companies - Thai Organic Chemicals Company (TOCC), Thai Epoxy and Allied Products Company (TEC), Thai Polyphosphate & Chemicals Company (TPC) and Thai Sulphites & Chemicals Company (TSC) - were merged to form Aditya Birla Chemicals (Thailand) in