Oriental Carbon and Chemicals Limited (OCCL), a company belonging to the Duncan JP Goenka group of companies, traces its origin to 1978 when it was incorporated as Dharuhera Chemicals Limited (DCL). In 1994 OCCL set up a unit for manufacturing of Insoluble sulfur which later emerged as the star product of the group. Insoluble sulfur manufactured in its plant is marketed as "Diamond Sulf" in India

Godrej Industries Limited, through its chemicals division, is India's leading manufacturer of oleochemicals and makes more than a hundred chemicals for use in over two dozen industries. The chemicals division has built a strong manufacturing base capable of delivering international quality products at competitive prices, and has implemented integrated systems which ensure quick delivery of product