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Tosoh Bioscience LLC (Tosoh Corporation)
Japanese bioscience and chromatography subsidiary of Tosoh Corporation (TYO: 4042, HQ Tokyo; ~¥900B revenue); produces TOYOPEARL brand bioprocess chromatography resins — the primary alternative to Cytiva resins for protein A (Protein A resin for antibody purification), hydrophobic interaction, and ion exchange chromatography in biologics manufacturing. Tosoh Bioscience's Protein A resins (TOYOPEARL AF-rProtein A and similar) are validated alternatives to Cytiva's MabSelect series for monoclonal antibody purification — one of the few Cytiva process alternatives with sufficient regulatory documentation for biologics manufacturers to qualify. Tosoh Corporation also manufactures specialty vinyl chloride resins, chlor-alkali chemicals, and other industrial chemicals alongside its bioscience chromatography business — a Japanese conglomerate spanning plastic pipes, caustic soda, and biologics purification from one Tokyo industrial company.
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Chlor-alkali & Inorganic Chemicals
38%Organic Chemicals
25%Specialty Materials & Engineering Plastics
22%Bioscience (TOYOPEARL)
15%
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Did you know2024
Tosoh Corporation (TYO: 4042) is primarily known in Japan as a chlor-alkali and PVC manufacturer — its chlorine, caustic soda, and vinyl chloride are used in PVC pipes, water treatment chemicals, and industrial processes. What the biologics pharmaceutical industry knows — and Japan's chemical industry does not widely discuss — is that Tosoh's Bioscience division makes TOYOPEARL protein A chromatography resins used to purify monoclonal antibody drugs that may cost $50,000-$200,000 per patient per year. The same Yamaguchi/Yokohama company whose caustic soda goes into Japan's water treatment system and whose PVC resin goes into plumbing also supplies the chromatography resin that separates a $100,000 cancer immunotherapy antibody from the Chinese hamster ovary cell culture it was grown in. Tosoh's chlor-alkali chemistry and its biologics chromatography chemistry share the same polymer science foundation but serve supply chains separated by $150,000 in final product value.
Tosoh Bioscience LLC ↗Origin2023
Tosoh Corporation was founded in 1935 in Shin-Nanyo, Yamaguchi Prefecture as Toyo Soda Manufacturing Company — producing soda ash (sodium carbonate) using the Solvay process at its Yamaguchi plant. The founding product was industrial soda ash for Japan's glass manufacturing industry. Tosoh evolved from soda ash to chlor-alkali chemicals (chlorine and caustic soda through electrolysis) in the postwar period, then expanded into vinyl chloride monomer and PVC. The bioscience chromatography business (TOYOPEARL resins) was developed in the 1970s-80s as Tosoh applied its polymer chemistry capability — developed for PVC and industrial plastics — to precision chromatography media. The same polymer synthesis expertise that makes Tosoh a major PVC resin producer enables production of the highly controlled cross-linked polymeric bead matrices used in bioprocess chromatography.
Tosoh Corporation ↗