Chlorofluoromethane
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| Template:Longitem | CH2ClF |
| Molar mass | 68.48 g/mol |
| Appearance | Gas |
| Density | 1.271 kg/m3 at 20 °C |
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| Template:Longitem | 0.15 mol.kg−1.bar−1 |
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Chlorofluoromethane or Freon 31 is the hydrochlorofluorocarbon (HCFC) with the formula CH2ClF. It is a colorless, odorless, flammable gas.[1] It is a class II ozone depleting substance and in accordance with the montreal protocol, its production and import were banned on 1 January 2015.[2]
Uses
Pyrolysis of a mixture of dichlorofluoromethane and chlorofluoromethane gives hexafluorobenzene:[1]
- 3 CHCl2F + 3 CH2ClF → C6F6 + 9 HCl
It was used as a refrigerant and has an ozone depletion potential of 0.02.
Additional data
Its crystal structure is monoclinic with space group P21 and lattice constants a = 6.7676, b = 4.1477, c = 5.0206 (0.10−1 nm), β = 108.205°.[3]
At an altitude of 22 km, traces of chlorofluoromethane occur (148 ppt).[4]
References
External links
- Thermochemical table at chemnet.ru
- Infrared Spectrum of Chlorofluoromethane
- IARC Summaries & Evaluations: Vol. 41 (1986), Vol. 71 (1999)