Idemitsu SM Plant Shutdown | Market Impact Report 2026

Idemitsu undertakes unplanned shutdown at SM plant

Jun 17, 2026

Idemitsu SM Malaysia has taken off stream its styrene monomer (SM) plant in Pasir Gudang. A source in Malaysia informed a team member, “The company is heard to have halted operations at the plant in early October 2025 due to technical issues. Details regarding the duration of the shutdown remain unclear, and confirmation from an authorized source could not be obtained.” Located at Pasir Gudang in Malaysia, the SM plant has a production capacity of 240,000 mt/year.