1,1,1-Trifluoroethane

1,1,1-Trifluoroethane, or R-143a or simply trifluoroethane, is a hydrofluorocarbon (HFC) compound that is a colorless gas. It should not be confused with the much more commonly used HFC gas R-134a, nor confused with the isomeric compound 1,1,2-trifluoroethane. 1,1,1-Trifluoroethane has a critical temperature of 73 °C.[1]

"R-143a" redirects here. For the road, see Route 143.
1,1,1-Trifluoroethane
Names
Preferred IUPAC name
1,1,1-Trifluoroethane
Other names
Methylfluoroform, 1,1,1-Trifluoroform, R-143a, HFC-143a, UN 2035
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.006.361
EC Number
  • 206-996-5
UNII
UN number 2035
  • InChI=1S/C2H3F3/c1-2(3,4)5/h1H3 checkY
    Key: UJPMYEOUBPIPHQ-UHFFFAOYSA-N checkY
  • InChI=1/C2H3F3/c1-2(3,4)5/h1H3
    Key: UJPMYEOUBPIPHQ-UHFFFAOYAD
  • FC(F)(F)C
Properties
C2H3F3
Molar mass 84.04 g/mol
Appearance Colourless gas
Density 3.7 kg/m3 (gas)
Melting point −111 °C (−168 °F; 162 K)
Boiling point −47.6 °C (−53.7 °F; 225.6 K)
Vapor pressure 11 200 hPa (20 °C)
Hazards
GHS labelling:
GHS02: FlammableGHS04: Compressed Gas
Danger
H220, H224, H280
P210, P233, P240, P241, P242, P243, P280, P303+P361+P353, P370+P378, P377, P381, P403, P403+P235, P410+P403, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Applications

Trifluoroethane is used as a refrigerant either by itself or more commonly as a component of blended mixtures. It is also used as a propellant in canned air products used to clean electronic equipment.

Environmental effects
Growth of R-143a concentration in earth's atmosphere since year 2007.[2]

Unlike CFCs used as refrigerants, trifluoroethane has no chlorine atoms and therefore is not ozone-depleting. Its high chemical stability and infra-red absorbency make it a potent greenhouse gas with a lifetime of about 50 years and a global warming potential of 4300, which are at the high end compared to many other commonly used HFC refrigerants.[3][4] Its abundance in the atmosphere more than doubled from about 10 parts per trillion (ppt) in 2010 to near 25 ppt in 2020.[2]


See also

References
  1. Schoen, J. Andrew, "Listing of Refrigerants" (PDF), Andy's HVAC/R Web Page, archived from the original (PDF) on 2009-03-19, retrieved 2011-12-17
  2. "HFC-143a". NOAA Earth System Research Laboratories/Global Monitoring Division. Retrieved 2021-02-12.
  3. "Chapter 8". AR5 Climate Change 2013: The Physical Science Basis. p. 731.
  4. "Refrigerants - Environmental Properties". The Engineering ToolBox. Retrieved 2016-09-12.
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