tetrafluoroethane the gas that replaced dichlorodifluoromethane in car air conditioners refrigeration and other applications due to ozone destruction
tetrafluoroethane known as r134a came into use during the 1990s due to the need for ozone safe more environmentally friendly refrigerant
freon'freon 12 'r12 'dichlorodifluoromethane'tetrafluoroethane'r134a