Chusei Oil

Chusei Oil Co., Ltd. is a Japanese specialty chemical company that provides contract manufacturing and distillation services to the pharmaceutical, agrochemical, and electronics industries. The company specializes in high-purity solvent recovery and the custom synthesis of pharmaceutical intermediates using advanced separation technologies. Chusei Oil operates significant manufacturing facilities in Japan and previously expanded its footprint into the United States through Chusei USA, which was later acquired by Monument Chemical. Today, the company remains a critical partner in the life sciences supply chain, offering large-scale production capabilities for complex chemical building blocks.