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Genetron® MP66

An interim replacement for R-12 in low-temperature commercial refrigeration systems. For transport refrigeration, low temperature retrofits, retrofits including air conditioners and dehumidifiers.

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General Information

  • ASHRAE #R-401B
  • ClassHCFC
  • Refrigerant TypeBlend
  • Typical LubricantAlkylbenzene
  • SubstitutesCFC-12
  • ContainsHCFC-22 (61%), HFC-152a (11%), HCFC-124 (28%)
  • GlideModerate
  • NotesIn most cases, no oil change is needed. Best for low temperature R-12 and R-500 retrofit appllications.

Physical Properties

  • Chemical NameChlorodifluoromethane, Difluoroethane, Chlorotetrafluoroethane
  • Chemical NotationCHClF2, CHF2CH, CHClFCF3
  • Molecular Weight (lbm/lbmol)92.9
  • Boiling Point @ 1 Atm, (°F)-30.2
  • Critical Temperature (°F) (ASTM D-1321)222.02
  • Critical Pressure* (psia)681.66
  • Saturated Liquid Density @ 86°F, (lb/ft3)73.1
  • Specific Heat of Liquid @ 86°F, (Btu/lb•°F)0.31
  • Specific Heat of Vapor @ Constant Pressure* (Cp), @ 86° and 1 Atm, (Btu/lb•°F)0.15
  • Flammable range, %vol. in air (Based on ASHRAE Standard 34 with Match Ignition)None
  • ANSI/ASHRAE Standard 34-1992 Safety Group ClassificationA1