Refrigerant R134A Physical Data
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Vehicle air conditioning systems make use of the vaporization and condensation process. In this case, one works with a substance which boils easily, designated as refrigerant.
The refrigerant used is tetrafluoroethane R134a, which boils at -26.5 °C (-15.7 °F) at a vapor pressure of "1 bar (14.5 psi)" (absolute pressure corresponds slightly to the ambient pressure).
| Chemical formula | CH2F-CF3 or CF3-CH2F |
| Chemical designation | Tetrafluoroethane |
| Boiling point at 1.0 bar (14.5 psi) | 26.5 °C (79.7 °F) |
| Solidification point | 101.6 °C (214.88 °F) |
| Critical temperature | 100.6 °C (213.08 °F) |
| Critical pressure | 40.56 bar (588.27 psi) |