Thirumalai Chemicals Ltd. manufactures and sells organic chemicals. The company is headquartered in Chennai, Tamil Nadu and currently employs 526 full-time employees.  The company operates through a single reportable segment of the sale of organic chemicals. Its product phthalic anhydride is used to produce unsaturated polyester resins, wire and cable application, hoses, pipes, coated fabrics, swimming pool liners, among others. Its product malic acid is used in the manufacture of skin and dental care products and can be used in a number of technical applications, such as electroplating and metal cleaning. The fumaric acid products are used in the manufacturing of medicines, drinks, food, animal feed, cleansing agents, unsaturated polyester, alkyd resins, and printing inks. Its diethyl phthalate (DEP) is used as a plasticizer for cellulose ester plastic films and sheets (photographic, blister packaging, and tape applications). Its subsidiaries include Cheminvest Pte Limited, Optimistic Organic Sdn Bhd and more.

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