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R22 Refrigerant Gas is majorly used as a propellant and refrigerant. Though R22 refrigerant has a high global warming potential, its use continues to increase in developing countries. 

R22 refrigerant has been used for years in central air conditioners, heat pumps, mini-splits, car AC systems, and other refrigeration equipment.

"R22 is used as an alternative to the CFC-11 and CFC-12, highly ozone-depleting, because of its relatively low ozone depletion. However, even this is no longer considered acceptable."

R-22 is a greenhouse gas with a GWP equal to 1810. Because of their lower ozone depletion potential Hydrofluorocarbons (HFCs) are often substituted for R-22, but these refrigerant gases often have a higher GWP. R-410A is often substituted having a GWP of 1725. Another substitute is R404A having a GWP of 3900. Other substitutes include Ammonia (R717) having a GWP of <1, Propane (R-290) having a GWP of 3.

Short name for the halocarbon compound CHClF2 (monochlorodifluoromethane). R stands for the refrigerant and in the number “22” second “2” denotes the number of the fluorine atoms in the compound.

R22 refrigerant gas finds its major application in the domestic air conditioners like packaged AC, window AC, split AC and in a number of centralized air conditioning systems. The non-toxic and it is non-flammable nature of R22 refrigerant gas makes it highly safe for the domestic and industrial purposes.

The heat output of R22 is quite high, which is why the degree of superheat in systems using this refrigerant should be minimal. The compression ratio of the systems using this refrigerant gas should also be minimal, and if there is a high cooling between the two compression layers it should be maintained.

Compared to refrigerant R12 displacement required by the compressor with refrigerant R22 is small. Displacement required for R22 refrigerant gas is 60% of that required for R12 refrigerant gas. This means that R22 produces 65% more refrigeration capacity than the system using the refrigerant R12 stating higher refrigeration efficiency and lower power consumption, a key parameter in the large industrial applications.

Molar Mass86.47 g/mol
AppearanceColorless gas
Density3.66 kg/m3 at 15 °C, gas
Melting point−175.42 °C (−283.76 °F; 97.73 K)
Boiling point−40.7 °C (−41.3 °F; 232.5 K)
Solubility in water 0.7799 vol/vol at 25 °C; 3.628 g/L
Vapor pressure908 kPa at 20 °C
Molecular shapeTetrahedral
% industrial gases dubai | UAE | middle Europe%

R22Gas Cylinder has a boiling point of -40.6 degree Celsius. As a result, at present R22 refrigerant is extensively used in industries for liquefaction of Chlorine. Various other low temperature applications like domestic and farm freezers use R22 refrigerant.

Alternatives for R22 refrigerant include: R410A, R134A, R507, and R407C.

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