Chemplast Sanmar Limited is an Indian company that mainly manufactures specialty chemicals such as specialty polyvinyl chloride (PVC) resin pastes and customised chemicals for the agrochemical, pharmaceutical and fine chemical industries. The company also produces other chemicals such as sodium hydroxide, chlorine chemicals, hydrogen peroxide, refrigerant gas and industrial salt. Its chlorine chemicals division produces a variety of products using an integrated manufacturing process. Its hydrogen peroxide is a chemical used in a variety of industries, including pulp and paper, textiles, and water treatment for chemical synthesis, sterilisation, bleaching, wastewater treatment, and more. The company's custom chemical products include organic chemicals and phytochemicals. The company's manufacturing units are located at Mettur, Berigai and Vedaranyam in Tamil Nadu and Karaikal in the Union Territory of Puducherry.