Tosoh Corporation is a diversified Japanese chemical manufacturer supplying bulk and specialty materials to global industrial and life-science markets. Its portfolio spans chlor-alkali and vinyl products, olefins and other petrochemicals, and advanced materials such as zirconia, silica glass, zeolites, and sputtering targets for electronics. Through Tosoh Bioscience, the company provides chromatography media and instruments used in biopharmaceutical manufacturing and analytical applications. Tosoh also offers engineering services and utilizes byproducts in areas such as cement and environmental materials.
Founded in 1935 and headquartered in Japan, Tosoh operates production, R&D, and sales sites worldwide. Its products serve sectors including chemicals, semiconductors, healthcare, water treatment, automotive, and construction. The company is organized into Petrochemical, Chlor-alkali, Specialty, and Engineering groups, reflecting its mix of commodity and high-value-added businesses.