OCI Company Ltd. engages in the manufacture and sell polysilicon, carbon black, and related products. It offers semiconductor materials, such as polysilicon, phosphoric acid, hydrogen peroxide, semiconductor precursor, and fumed silica; Li-ion battery materials, including caustic soda and high softening paint pitch; and carbon materials comprising carbon black, pitch, BTX, and plasticizers. The company provides TDI products. OCI Company Ltd. was incorporated in 1959 and is headquartered in Seoul, South Korea.