Tosoh is a Japanese diversified chemical manufacturer and the core company of the Tosoh Group. Its businesses span basic chemicals such as chlor-alkali and vinyl products (including caustic soda, chlorine, and PVC), petrochemicals and organic intermediates, and a broad range of specialty materials. These specialties include zeolites, zirconia, silica and quartz materials, sputtering targets, and ion-exchange resins, as well as engineering plastics.
The company also operates a life-science segment through Tosoh Bioscience, which provides chromatographic media, HPLC columns and instruments, and diagnostic reagents used in biopharmaceutical and analytical applications. With major production complexes in Japan and operations across Asia, Europe, and the Americas, Tosoh supplies key materials and technologies to industries including automotive, construction, electronics, water treatment, and healthcare. The group emphasizes reliable supply, quality, and safety in large-scale chemical production and advanced materials manufacturing.
