... of nontoxicity, odourlessness, incombustibility, non-explosiveness and good heat stability and stable chemical property.Usage:It is used in ... as refrigerant in air conditioning system in industry, commerce and house. It can also be used as a pesticide ... standard : Purity, %≥99.8Moisture, PPm≤10Acidity, PPm≤0.1Vapor Residue, PPm≤100AppearanceColorless, No turbidOdorNo Strange Stench 99.9% high pure r22 ...