Basic Chemicals
We manufacture and sell products that serve as raw materials for petrochemicals, derived from naphtha and other materials obtained during the crude oil refining process. Leveraging our strength in integrated operations with petroleum refining, we aim to maintain and strengthen our competitiveness as a core business. Furthermore, we are advancing the manufacturing and sales of chemically recycled and biomass chemicals, and building supply chains to contribute to the realization of a Resources recycling society.
Basic information
What are Basic Chemicals?
We will introduce what Basic Chemicals are, along with our production capacity, bases, and manufacturing flow.
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Building a supply chain for biomass plastics
Aiming to reduce the carbon content of plastic raw materials, we are working to supply biomass chemicals and build a supply chain for biomass plastics.
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recycling used plastics
We aim to build Resources circulation system in which used plastics are recycled by heating and breaking them down into a refined oil equivalent to crude oil (oilification).
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Product Line
SDS download
We provide SDS (Safety Data Sheet) for safe product management.
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Prime Polymer Co., Ltd.
This is a joint venture between Mitsui Chemicals Co., Ltd. and Idemitsu Kosan. We manufacture, process, and sell polypropylene resin and polyethylene resin, and aim to create diverse and high value-added new products and technologies.
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PS Japan Co., Ltd.
This is a joint venture between Asahi Kasei Corporation and Idemitsu Kosan. As Japan's largest polystyrene resin manufacturer, we manufacture, sell, and conduct research and development of synthetic resins.
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Petrochemicals (Malaysia) Sdn. Bhd.
Established in 1972, it is a wholly owned subsidiary of Idemitsu Kosan. As Malaysia's only polystyrene manufacturer, we manufacture polystyrene resin and sell it to Southeast Asia, including Malaysia.
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Chemical Recycle Japan, Co., Ltd.
This is a joint venture between Idemitsu Kosan and Environmental Energy Co., Ltd. We sell recycled oil made from used plastics and contribute to the circulation of plastic Resources through chemical recycling.
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