1,1,1-Trifluoroethane
Chemical compound
From Wikipedia, the free encyclopedia
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]
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| Names | |
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| Preferred IUPAC name
1,1,1-Trifluoroethane | |
| Other names
Methylfluoroform, 1,1,1-Trifluoroform, R-143a, HFC-143a, UN 2035 | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.006.361 |
| EC Number |
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PubChem CID |
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| UNII | |
| UN number | 2035 |
CompTox Dashboard (EPA) |
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| 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: | |
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| Danger | |
| H220, H224 | |
| 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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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
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]