TOSOH CORPORATION mainly provides chemical products. The Petrochemicals segment manufactures and sells olefin products, polyethylene, processed resin products and functional polymers. The Chlor-alkali segment offers caustic soda, vinyl chloride monomers, vinyl chloride resin, inorganic and organic chemicals, cement, urethane materials and others. The Functional Products segment provides inorganic and organic fine chemicals, measuring and diagnostic products, electronic materials and functional materials. The Engineering segment is engaged in the manufacture and sale of water treatment equipment, water purifying equipment and ion-exchange resin, as well as the design and construction of plant works and electrical works. The Others segment offers transportation services, insurance agency services, industrial chemicals, oxygen, nitrogen, carbon dioxide, among others.