IRPC Public Co., Ltd. engages in petroleum and petrochemical business. It operates through the following segments: Petroleum Products, Petrochemical Products, and Other Businesses. The Petroleum Products segment is involved in the production and sale of refinery oil, lubricant oil, and asphalt. The Petrochemical Products segment focuses on the production and sale of olefins, aromatics, and related products. The Other Businesses segment refers to power plants, jetty, and utilities. The company was founded on August 3, 1978 and is headquartered in Chatuchak, Thailand.