... price 3.OEM is accepted; 4.CE/DOT approved; Refrigerant gas R134a ,1,1,1,2-Tetrafluoroethane ,used in auto air ... -coolers,display cases, auto air-conditions,refrigerators,cenrel air conditions,commercial refrigeration,and also been used in areas such as medicine ... maxVapor Residue, PPM 100 maxDetermination of chlorides (Cl-) Pass Refrigerant gas R134a R22