IRPC Annual Report 2023

Domestic Polymer Producers and Capacities in 2023 Product Company Capacity (Unit: Thousand Tons) % HDPE IRPC Public Company Limited 120 6 Thai Polyethylene Co., Ltd. 1,000 52 PTT Global Chemical Public Company Limited 800 42 Total 1,920 100 PP IRPC Public Company Limited 775 30 HMC Polymers Co., Ltd. 1,060 42 Thai Polypropylene Co., Ltd. 720 28 Total 2,555 100 ABS IRPC Public Company Limited 180 66 Ineos ABS (Thailand) Co., Ltd. 95 34 Total 275 100 EPS IRPC Public Company Limited 48 100 Total 48 100 PS IRPC Public Company Limited 120 33 Siam Polystyrene Co., Ltd. 150 42 GC Styrenics Co., Ltd. 90 25 Total 360 100 Feedstock Procurement The main feedstock for IRPC’s production is crude oil. The company procures most of the crude oil from the Middle East through PTT. In addition, the company also purchases crude from domestic sources, which offer lower prices and transportation costs. Crude oil from abroad is transported by large tankers to the deep sea port located in the same general area as IRPC’s refinery and production complex, and fed into the company’s production process, making feedstock management efficient. In 2023, IRPC’s purchase of crude oil accounted for 81 percent of its total raw materials. Sources of its crude oil procurement were as follows: Middle East (Saudi Arabia and UAE, etc.) 70%, the Far East 6%, domestic sources 3%, and from other regions, such as the United States, 21%. 73 Structure and Business Operations of IRPC 56-1 ONE REPORT 2023

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