Oriental Carbon and Chemicals (OCCL), a company belonging to the Duncan JP Goenka group of companies, traces its origin when it was incorporated in 1978 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.

OCCL produces wide range of insoluble sulfur grades (Including Pre-dispersed & Master batches), which are being widely exported to leading tyre companies around the world. OCCL's efforts in exports have earned Government of India's recognition as certified 'Star Export House'. In India OCCL is the undisputed leader with major market share. One of OCCL's unit in Dharuhera as a designated Export Oriented Unit.

OCCL’s Insoluble sulfur units are situated at Dharuhera, in the Indian State of Harayana, about 80 Km South West of New Delhi. Insoluble sulfur manufactured in this plant is marketed as 'Diamond Sulf' in India and around the world. The plant, through continuous innovations over the years, can be counted among the best in the world.

Quality consciousness and an understanding of the customers needs for constant product and process improvement has contributed to the growth of OCCL's Insoluble sulfur business. An ongoing mutually rewarding relationship with it's global clients, complemented by a growing demand for Diamond Sulf, has encouraged OCCL to continuously enhance it's production levels.

Product range of the company includes:

• Insoluble Sulfur
• Special Grade Insoluble Sulfur
• Special Grade Insoluble Sulfur
• Sulfuric Acid

Achievements/ recognition:

• ISO 9001-2000 and
• EMS14001-2004 Certified.