The complex, which is 50 percent owned by SABIC, has a total production capacity of 3 million tons per year, it said in an e-mailed statement. SABIC, one of the world's biggest chemical firms, said estimated its investment in the complex at about $2.7 billion.

Products will include ethylene, polyethylene, glycol ethylene and polypropylene, the statement said. The complex began pre-production operations at the plant in January. The start of commercial operations at the complex means that the joint venture partners will start to book its revenues and operating costs.