1,1,1,2-Tetrafluoroethane

1,1,1,2-Tetrafluoroethane

Introduction

1,1,1,2-Tetrafluoroethane, commonly known by several names including R-134a, Freon 134a, and HFC-134a, is a hydrofluorocarbon (HFC) used primarily as a refrigerant. It is known for having thermodynamic properties similar to R-12 (dichlorodifluoromethane) but with significantly lower environmental impact.

Chemical Properties

File:1,1,1,2-Tetrafluoroethane Structural Formula V.1.svg

Chemical structure of 1,1,1,2-Tetrafluoroethane.

The chemical formula for 1,1,1,2-Tetrafluoroethane is CF3CH2F. It has a boiling point of −26.3 °C (−15.34 °F) at atmospheric pressure.

Environmental Impact

R-134a is notable for its negligible ozone depletion potential and a lower 100-year global warming potential (GWP) of 1,430, compared to R-12's GWP of 10,900.

Uses

This compound is used in various applications such as:

• Automotive air conditioning systems
• Refrigeration systems
• Aerosol propellants
• Foam-blowing agents

Health and Safety

Exposure to R-134a can have health implications, including skin and eye irritation and, in high concentrations, asphyxiation.

Regulation and Phaseout

Due to environmental concerns, there has been a move to phase out R-134a since 2012, particularly in the automotive market. Alternatives like HFO-1234yf, with GWPs similar to CO2, are being adopted.

Container Identification

R-134a cylinders are identified by their light blue color.

Transition to Alternatives

The transition to more environmentally friendly alternatives, such as HFO-1234yf, is ongoing in response to environmental regulations and concerns over global warming.

See Also

• Hydrofluorocarbon
• Refrigerant
• Global warming potential

External Links

• EPA - SNAP Substitutes in Stationary AC
• Chemours - Opteon YF (HFO-1234yf).