The company was set up in 1997 by the name of Engro Asahi Polymer and Chemical Ltd. It was a joint venture between Engro Chemical (50%), Asahi Glass Company (30%) and Mitsubishi Corporation (20%) to set up a 100,000 ton capacity PVC plant at Port Qasim. The plant came into commercial operation in 1999.In 2006, Asahi Glass divested from the business and Engro Chemical acquired its shareholding. The name of the company was changed to Engro Polymer & Chemicals Limited.In 2007, the Company embarked upon an expansion and back integration project to enhance the PVC capacity to 150 KT and set up a EDC-Vcal and Chlor-alkali plants.