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Names | |
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Preferred IUPAC name 1,2-Dichloro-1,1,2-trifluoroethane | |
Other names R-123a | |
Identifiers | |
3D model (JSmol) | |
ChemSpider | |
ECHA InfoCard | 100.005.955 |
EC Number |
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PubChem CID | |
UNII | |
UN number | 3163 1078 |
CompTox Dashboard (EPA) | |
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Properties | |
C2HCl2F3 | |
Molar mass | 152.93 g·mol−1 |
Density | 1.50 |
Melting point | −78.0 °C (−108.4 °F; 195.2 K) |
Boiling point | 29.5 °C (85.1 °F; 302.6 K) |
Vapor pressure | 620.01 mmHg |
Henry's law constant (kH) | 9.55×10−2 atm-cu m/mole |
Refractive index (nD) | 1.327 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
1,2-Dichloro-1,1,2-trifluoroethane is a volatile liquid chlorofluoroalkane composed of carbon, hydrogen, chlorine and fluorine, and with structural formula CClF2CHClF. It is also known as a refrigerant with the designation R-123a. [1]
1,1,2-Trichloro-1,2,2-trifluoroethane can be biotransformed in sewage sludge to 1,2-dichloro-1,1,2-trifluoroethane. [2]
The critical temperature of R-123a is 461.6 K (188.5 °C; 371.2 °F). [3] The rotation of the molecule appears to be hindered by the present of chlorine on each carbon atom, but is eased at higher temperatures. [3]
Although not deliberately used, R-123a is a significant impurity in its isomer, the widely used 2,2-dichloro-1,1,1-trifluoroethane (R-123). [3]