R134a is a hydrofluorocarbon (HFC) refrigerant gas used in air conditioning and refrigeration systems. 

R134a is a refrigerant gas that is commonly used in air conditioning and refrigeration systems. It is a hydrofluorocarbon (HFC) that was introduced as a replacement for the older refrigerants, such as R12 and R22, which were found to contribute to ozone depletion. R134a does not contain any chlorine, which makes it a more environmentally friendly alternative. It is a colorless, odorless gas that is non-toxic and non-flammable. R134a has a low boiling point, which allows it to absorb heat from the surrounding environment and release it when it is compressed. It is a popular refrigerant due to its efficient performance and safety.

General Information

Chemical Name
  • 1,1,1,2-Tetrafluoroethane

Linear Formula
  • CH2FCF3

Refrigerant Class
  • HFC

  • R-134a

  • R-1234yf, R-152a, R-744

Physical Properties

Molecular Weight
  • 102.03 g/mol

Boiling Point
  • -26.3°C

Freezing Point
  • -101.1°C

Critical Temperature
  • 101.1°C

Vapor Pressure
  • 6.69 MPa (25°C)

Vapor Density
  • 3.56 (air = 1.0)

Relative Density
  • 1.21 g/cm³ (liquid at 25°C)

Water Solubility
  • 0.15 g/L (25°C)

Evaporation Rate
  • 3.4 (n-butyl acetate = 1.0)


  • Non-flammable

Flammability Range
  • None

Flash Point
  • Not applicable

Global Warming Potential (GWP)
  • 1300

Ozone Depletion Potential (ODP)
  • 0

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