Refrigerant R142B gas 1)factory directly sell 2)100% pure gas. 3)sample order is welcomed 4)CE,DOT,TC ... , PPm ≤100AppearanceColorless, No turbidOdorNo Strange Stench Application:Refrigerant, intermediate materialWarranty:100% pure gas meet the international stardard ARI700.Support the third part ... customers.CE,DOT,TC Certifiacation is avaliable. CFC 142B refrigerant 100% pure gas