Dupont faces higher costs as U.S. cools on Chinese refrigerant imports March 18, 2020 The U.S. government has voted to continue an anti-dumping investigation into difluoromethane imports from China. Difluoromethane is a modern refrigerant that can replace traditional ozone damaging CFCs. China accounted for 89.5% of U.S. imports in 2019, following a 35.5% slide in the average i... Read more →