Tosoh Corp is a Japan-based company mainly engaged in the manufacture and sale of basic raw materials and functional products such as petrochemicals and chemical products. The Company operates in four segments. The Petrochemicals segment manufactures and sells olefin products such as ethylene and propylene, low-density polyethylene, high-density polyethylene, processed resin products, and functional polymers. The Chlor-Alkali segment manufactures and sells caustic soda, vinyl chloride monomer, vinyl chloride resin, inorganic and organic chemicals, cement, and urethane materials. The Functional Products segment manufactures and sells inorganic and organic fine products, measuring and diagnostic products, electronic materials, and functional materials. The Engineering segment manufactures and sells water treatment facilities and engages in construction and repair businesses. The Company also engages in transportation and warehousing, inspection and analysis, and information processing.