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Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> General, Technical Data (Refrigerant R1234YF Servicing) >> 00 General, Technical Data >> Technical And Physical Principles >> Pyrotechnical Characteristics >> Refrigerant R1234YF Physical And Chemical Characteristics

Refrigerant R1234YF Physical And Chemical Characteristics

The following are the most important characteristics and safety precautions for refrigerant R1234yf. The complete specifications can be found in the respective safety data sheets.

Chemical formula CF3CF=CH2
Chemical designation 2, 3, 3, 3-Tetrafluorprop-1-en, HFO-1234yf
Boiling point at 1 bar (14.5 psi) -29.4 °C (-20.92 °F)
Solidification point -152.2 °C (-241.96 °F)
Critical temperature 94.7 °C (202.46 °F)
Critical pressure 32.82 bar (476 psi) 33.82 bar (476 psi)
Self-ignition point 405 °C (761 °F) at 1.02 bar (14.79 psi)
Flammability Flammable gas
  • Lower flammability limit 6.2% (volume)
  • Upper flammability limit 12.3% (volume)
Shape Compressed liquid gas
Color Colorless
Smell Faint odor