Seiko Chemical Co., Ltd.
Japanese manufacturer and seller of industrial chemicals including rubber antioxidants, polymerization inhibitors, and dye intermediates.
Last updated September 1, 2026
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Overview
Seiko Chemical Co., Ltd. is a Japanese company founded in April 1946 and established in March 1947. It manufactures and sells industrial chemicals such as rubber antioxidants, polymerization inhibitors, and dye intermediates. The company is headquartered in Tokyo and has a factory in Kawaguchi, Saitama Prefecture.
History
Seiko Chemical Co., Ltd. was founded in April 1946 as Kimijima Laboratory in Shimo-machi, Kita-ku, Tokyo, and was the first to industrialize organic rubber chemical technology in Japan. It was renamed Seiko Chemical Co., Ltd. in 1947. Over the years, the company started production of various products including hydroquinone (photographic chemicals) in 1948, rubber antioxidants (Nonflex H, F, D) in 1949, and polymerization inhibitors such as methoquinone in 1961. The company expanded with a new factory in Kawaguchi, Saitama Prefecture in 1960, and established an Osaka branch in 1959. In 1968, it made Sanyo Shoji Co., Ltd. (now Sun Chemtech Co., Ltd.) a subsidiary. The company received certification as an export contributing enterprise in 1971. In 1981, it increased its capital to 120 million yen and started production of New Aid (anti-tack agent). It obtained ISO9002 certification in 2001, ISO9001 in 2003, and ISO14001 in 2005. The head office was moved to its current location in 2017.
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