... is a kind of refrigerant of surrounds-protection model, used in replacing R22 R502.It has a good nature of cleaning, low ... poison, non-combustion, good-refrigeration and so on, and greatly ... , mg/kg ≤10Acidity, mg/kg ≤1Residue mg/kg ≤100Non-congealing gas-phase, % (v/v), ≤1.5Packing: 11.3kg, 500kg, 1000kg, ISOTANK Refrigerant Gas R407C