Oriental Carbon & Chemicals Limited, together with its subsidiaries, manufactures and sells insoluble sulphur and sulphuric acid in India and internationally. It operates through Chemicals, Investments, and General Engineering Products segments. The company offers its insoluble sulphur products under the Diamond Sulf brand. It also provides commercial and battery grade sulphuric acid, and oleum for use as a dehydrating agent, catalyst, and active reactant in chemical processes, solvents, and absorbents . Its sulphuric acid products are used for storage battery, rayon, dye, acid slurry, and pharmaceutical applications, as well as for the steel, heavy chemical, and super-phosphates manufacturing industries. In addition, the company manufactures and trades fluid power and automation products. It exports its products. Oriental Carbon & Chemicals Limited was incorporated in 1978 and is based in Noida, India.