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Difluoromethane
| Difluoromethane
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| IUPAC name
| Difluoromethane
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| Other names
| Methylene fluoride, Methylene difluoride, Carbon fluoride hydride, HFC 32, R 32, FC 32, Freon 32, UN 3252
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| Identifiers
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| CAS number
| 75-10-5
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| PubChem
| 6345
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| EINECS number
| 200-839-4
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| RTECS number
| PA8537500
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| SMILES
| C(F)F
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| InChI
| InChI=1/CH2F2/c2-1-3/h1H2
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| Properties
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| Molecular formula
| CH2F2
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| Molar mass
| 52.02 g/mol
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| Appearance
| Colorless gas
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| Density
| 2.72 kg/m3 at 15 °C (59 °F)
2.163 kg/m3 at 21.1 °C (70 °F)
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| Melting point
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-136 °C
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| Boiling point
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-51.6 °C
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| Vapor pressure
| 1518.92 kPa at 21.1 °C (70 °F)
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| Hazards
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| EU classification
| Extremely flammable (F+)
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| NFPA 704
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| R-phrases
| R12
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| S-phrases
| S9, S16, S23
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Autoignition
temperature
| 648 °C
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Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references
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Difluoromethane, also called HFC-32 or R-32, is an organic compound of the dihalogenoalkane variety. It is based on methane, except that two of the four hydrogen atoms have been replaced by fluorine atoms. Hence the formula is CH2F2 instead of CH4 for normal methane.
Physical properties
Uses
Difluoromethane is a refrigerant that has zero ozone depletion potential. Difluoromethane in an azeotropic mixture with pentafluoroethane is known as R-410A, a common replacement for various chlorofluorocarbons (aka Freon) in new refrigerant systems. Although it has zero ozone depletion potential, it has high global warming potential, 550 times that of carbon dioxide, based on a 100-year time frame [[1]].
See also
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Difluoromethane". A list of authors is available in Wikipedia.
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