ONGC Mangalore Petrochemicals Ltd (OMPL), the aromatics complex in Mangalore jointly promoted by Oil and Natural Gas Corporation and Mangalore Refinery and Petrochemicals Ltd (MRPL), will begin production by the end of June or early July.The project is 99 percent complete and the company will be able to commission it in 20-30 days. The pre-commissioning activities are going on for some time. Paraxylene and benzene are the major products of OMPL. Paraxylene is used in the production of polyester fibres and PET bottles. Benzene is used as an intermediate to make products such as styrene, polystyrene, phenol and nylon.