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Solstice® N40

Solstice® N40 is a non-flammable, reduced GWP HFO refrigerant for new supermarkets or R-404A retrofits, especially low- and medium-temp refrigeration. It has a GWP of 1273 and provides 68% GWP reduction and around 15% lower energy consumption compared to R404A. It is listed under the U.S. EPA’s SNAP program to replace ozone-depleting substances.

Download Retrofit Guidelines
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Related TDS/SDS

General Information

  • ASHRAE #R-448A
  • ClassZeotropic blend
  • Typical LubricantPOE (polyol ester) Oil
  • SubstitutesR-404a, R22
  • ContainsR-32 / R-125 / R134a / R-1234ze / R-1234yf
  • Glide7.0°F
  • GWP1273

Physical Properties

  • Chemical FormulaR-32 / R-125 / R134a / R-1234ze / R-1234yf
  • Composition26%/26%/21%/7%/20%
  • Boiling Point @ 1 Atm, (°F)-50.7
  • Critical Temperature (°F)182.6
  • Critical Pressure* (psia)675.6
  • Critical Volume (ft3/lb)0.0333
  • Critical Density (lb/ft3)30.0
  • Vapor density at boiling point (lb/ft3)0.294
  • Liquid density at 32ºF (lb/ft3)74.4
  • Liquid density at 77°F (lb/ft3)68.2
  • Vapor density at 77ºF (lb/ft3)3.0
  • Liquid heat capacity at 77°F (Btu/lb·°F)0.37
  • Vapor heat capacity at 77°F (Btu/lb·°F)0.28
  • Heat of vaporization at boiling point (Btu/lb)103.8
  • Vapor Pressure at 77°F (psia)160.6
  • Liquid thermal conductivity at 77°F (mBtu/h-ft-°F)0.047
  • Vapor thermal conductivity at 77°F (mBtu/h-ft-°F).0084
  • Liquid viscosity at 77°F (μlb/ft·hr)0.339
  • Vapor viscosity at 77°F (μlb/ft·hr)0.030
  • ANSI/ASHRAE Standard 34-1992 Safety Group ClassificationA1