... of refrigeration equipment Property and application:ISOBUTANE is an excellent refrigerant which has a high refrigerating ability ,low power and ... ,non-toxic,non-flammable liquefied gas under the autolokgous pressure .Refrigerant can replace R12 Molecular weight58.12Bp , °C-11.80Critical temperature ... , ≤%0.001Acidity, ≤%0.0001Residue on evaporation, ≤%L0.01Quality standard: Isobutane R600A refrigerant