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DewGas R438A

Refrigerant R-438A
Residential Air Conditioning Gas

R-438A is a HFC blend, used as a replacement for R22 in domestic, industrial and commercial air-conditioning systems. It is also a retrofit replacement for R22 in low, medium and high temperature refrigeration applications and DX chiller systems. R-438A has an ASHRAE safety classification of A1 (non-flammable) and similar pressure temperature-enthalpy characteristics to R-22, making it suitable for use in existing R-22 equipment over a wide range of evaporator temperatures with no rerating or safety reclassification of the equipment.


  • Domestic Air-Conditioning
  • Industrial Air-Conditioning
  • Transport Air-Conditioning


  • R438A is a Zeotropic refrigerant. Therefore it must be charged in the liquid phase to prevent fractionation.
  • Several compressor oils can be used with the R438A, so it is probably not necessary to change the oil previously used in the equipment.
ISO Tank : 19000 Kgs. Net weight
Toners : 825 Kgs. Net weight
Big cylinders : 61 Kgs. Net weight
Small cylinders : 10 Kgs. Net weight
Composition R-125 (45%),R-134a (44.2%), R-32 (8.5%)    R-600 (1.7%),R-601a (0.6%)
Chemical Name Pentafluoroethane, 1,1,1,2-Tetrafluoroethane, Difluoromethane, Isobutane, Isopentane
Class HFC
ASHRAE Safety Classification A1-non-toxic and non-flammable
GWP 2265
Recommended Lubricant MO/AB/POE
Critical Temperature 83.74°C
Critical Pressure 42.16 Bar
Boiling Point at 0 Bar(g) -42.3°C


Inspection Item Unit Value
Appearance Clear, Transparent and Colorless
Purity %(m/m) >99.8
Water Content %(m/m) <0.001
Evaporation Residue %(m/m) <0.01
Acid Content (as HCI) %(m/m) <0.0001
Non Condensable Gas %(m/m) <1.5