... competitive price 3.OEM is accepted; 4.CE/DOT approved; Refrigerant gas R134a ,1,1,1,2-Tetrafluoroethane ,used in auto air ... ,central air-condition.R-134a has been widly used as refrigerant in car ,super-market freezer,reach-in-coolers,display cases ... 1 maxVapor Residue, PPM 100 maxDetermination of chlorides (Cl-) Pass Refrigerant gas R134a R22