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
Coborn’s Selects Solstice N40 for New, Next-Gen Grocery Store
Solstice N40: R404A Retrofit at TOPS Supermarkets

Related TDS/SDS

General Information

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

Physical Properties

  • Molecular Weight (lbm/lbmol)86.3 lbm/lbmol
  • Boiling Point @ 1 Atm, (°F)-51.0°F
  • Critical Pressure* (psia)666.4 psia
  • Critical Temperature (°F)180.8°F
  • Critical Volume (ft3/lb)0.03356 ft3/lbm
  • Critical Density (lb/ft3)29.80 lbm/ft3
  • Vapor density at boiling point (lb/ft3)0.2937 lbm/ft3
  • Liquid density at 32ºF (lb/ft3)74.77 lbm/ft3
  • Liquid density at 77°F (lb/ft3)68.50 lbm/ft3
  • Vapor density at 77ºF (lb/ft3)3.053 lbm/ft3
  • Liquid heat capacity at 77°F (Btu/lb·°F)0.3717 Btu/lbm °R
  • Vapor heat capacity at 77°F (Btu/lb·°F)0.2767 Btu/lbm °R
  • Heat of vaporization at boiling point (Btu/lb)103.9 Btu/lbm °R
  • Vapor Pressure at 77°F (psia)162.1 psia"
  • Liquid thermal conductivity at 77°F (mBtu/h-ft-°F)0.0469 Btu/h ft °R
  • Vapor thermal conductivity at 77°F (mBtu/h-ft-°F)0.0084 Btu/h ft °R
  • Liquid viscosity at 77°F (μlb/ft·hr)9.34 x 10-5 lbm/ft s
  • Vapor viscosity at 77°F (μlb/ft·hr)8.41 x 10-6 lbm/ft s
  • ANSI/ASHRAE Standard 34-1992 Safety Group ClassificationA1
  • Class/TypeZeotropic blend
  • Formula26%/26%/21%/7%/20% R-32/R-125/R-134a/ R-1234ze(E)/R-1234yf
  • AppearanceColorless
  • ODP (ODP-R11=1)0 (zero)
  • GWP REV /5TH IPCC1387 / 1273
  • LFL (percentage vol)Nonflammable