... ,R-406a,R-407C,R-410a 3.R507,R-502 R134A RefrigerantCharacter USES:Do not contain chlorine atom, McQuay of atmospheric ... refrigeration system flow easily. The heat transfer performance than 134a R R, therefore the 12 can greatly reduce the dosage of refrigerant ... . At room temperature for a colorless gas pressure in itself, is a colorless transparent ...