Sinopec

Sinopec (China Petroleum and Chemical Corporation) is China's largest petroleum refiner and one of the world's biggest energy companies by revenue. It became a focal point of the US-Iran sanctions confrontation in May 2026 when OFAC's successive SDN rounds (including 11, 12, 15 and 19 May) repeatedly declined to designate major mainland Chinese refineries. The pattern reflected a deliberate US calculation to avoid triggering full Chinese retaliation as nuclear diplomacy continued.

Sinopec is a state-owned enterprise headquartered in Beijing, majority-owned by the Chinese government through Sinopec Group. It processes Iranian crude through its refinery network and has maintained procurement channels that Western sanctions have consistently failed to sever. Beijing's 2 May 2026 MOFCOM Blocking Rules, activated for the first time, explicitly barred Chinese firms (including Sinopec) from complying with OFAC Iran designations, creating a direct legal conflict between US and Chinese jurisdiction.

The company's structural insulation from secondary sanctions illustrates the ceiling on US economic pressure: designating Sinopec would trigger immediate diplomatic escalation with Beijing at a moment when Washington is seeking Chinese cooperation on Iran nuclear talks. That constraint has made Sinopec a reliable conduit for Iranian oil exports throughout the 2026 conflict.