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HFCs

508B (R-508B)

A non-ozone depleting azeotrope of R-23 and R-116 used to replace R-13 and R-503 in the low stage of cascade systems. For new equipment and retrofits.

General Information

  • Typical Lubricant
    • POE
  • Linear Formula
    • CHF3, C2 F6
  • ASHRAE Number
    • R-508B
  • Refrigerant Type
    • Azeotrope
  • Substitutes
    • CFC-13, R-503
  • Chemical Name
    • Trifluoromethane, Hexafluoroethane
  • Contains
    • HFC-23 (46%), FC-116 (54%)
  • Application
    • Commercial Refrigeration
  • Refrigerant Class
    • HFC

Physical Properties

  • Molecular Weight
    • 95.4 lbm/lbmol
  • Saturated Liquid Density
    • 79.8 lb/ft3 at 30 °F
  • Specific Heat of Liquid
    • 0.30 at 30 °F
  • Critical Pressure
    • 549.54 psia
  • Specific Heat of Vapor
    • 0.14 at 30 °F

Temperature

  • Critical Temperature
    • 53.289 °F (ASTM D-1321)
  • Boiling Point/Range
    • -125.3 °F at 1 Atm

Safety & Environment

  • Flammable Range
    • None, %vol. in air (Based on ASHRAE Standard 34 with Match Ignition)

Standards & Approvals

  • ASHRAE Safety Classification
    • A1

Other

  • Other Notes
    • Lower discharge temperatures than R-13 and R-23. Good performance match to R-503.

General Information

  • Typical Lubricant
    • POE
  • Linear Formula
    • CHF3, C2 F6
  • ASHRAE Number
    • R-508B
  • Refrigerant Type
    • Azeotrope
  • Substitutes
    • CFC-13, R-503
  • Chemical Name
    • Trifluoromethane, Hexafluoroethane
  • Contains
    • HFC-23 (46%), FC-116 (54%)
  • Application
    • Commercial Refrigeration
  • Refrigerant Class
    • HFC

Physical Properties

  • Molecular Weight
    • 95.4 lbm/lbmol
  • Saturated Liquid Density
    • 79.8 lb/ft3 at 30 °F
  • Specific Heat of Liquid
    • 0.30 at 30 °F
  • Critical Pressure
    • 549.54 psia
  • Specific Heat of Vapor
    • 0.14 at 30 °F

Temperature

  • Critical Temperature
    • 53.289 °F (ASTM D-1321)
  • Boiling Point/Range
    • -125.3 °F at 1 Atm

Safety & Environment

  • Flammable Range
    • None, %vol. in air (Based on ASHRAE Standard 34 with Match Ignition)

Standards & Approvals

  • ASHRAE Safety Classification
    • A1

Other

  • Other Notes
    • Lower discharge temperatures than R-13 and R-23. Good performance match to R-503.
  • Typical Lubricant : POE
  • Linear Formula : CHF3, C2 F6
  • ASHRAE Number : R-508B
  • Refrigerant Type : Azeotrope
  • Substitutes : CFC-13, R-503
  • Chemical Name : Trifluoromethane, Hexafluoroethane
  • Contains : HFC-23 (46%), FC-116 (54%)
  • Application : Commercial Refrigeration
  • Refrigerant Class : HFC
  • Molecular Weight : 95.4 lbm/lbmol
  • Saturated Liquid Density : 79.8 lb/ft3 at 30 °F
  • Specific Heat of Liquid : 0.30 at 30 °F
  • Critical Pressure : 549.54 psia
  • Specific Heat of Vapor : 0.14 at 30 °F
  • Critical Temperature : 53.289 °F (ASTM D-1321)
  • Boiling Point/Range : -125.3 °F at 1 Atm
  • Flammable Range : None, %vol. in air (Based on ASHRAE Standard 34 with Match Ignition)
  • ASHRAE Safety Classification : A1
  • Other Notes : Lower discharge temperatures than R-13 and R-23. Good performance match to R-503.