1,1,1-Trichloro-2,2,2-trifluoroethane
Organic molecule of anthropogenic origin implicated in ozone depletion
From Wikipedia, the free encyclopedia
1,1,1-Trichloro-2,2,2-trifluoroethane, also called Asymmetrical trichlorotrifluoroethane or CFC-113a, is a chlorofluorocarbon (CFC) with the formula CCl3CF3.
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| Names | |||
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| Preferred IUPAC name
1,1,1-Trichloro-2,2,2-trifluoroethane | |||
| Other names
CFC-113a Freon 113a Arcton 63 Freon-FT 1,1,1-Trichloro-2,2,2-trifluoroethane 1,1,1-Trichlorotrifluoroethane 1,1,1-Trifluoro-2,2,2-trichloroethane 1,1,1-Trifluorotrichloroethane FC 113 FC133a Precision cleaning agent TF T-WD602 Unsymmetrical Trichlorotrifluoroethane FC 113a 2,2,2-Trichloro-1,1,1-trifluoroethane | |||
| Identifiers | |||
3D model (JSmol) |
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| ChemSpider | |||
| ECHA InfoCard | 100.005.968 | ||
| EC Number |
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PubChem CID |
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| UNII | |||
CompTox Dashboard (EPA) |
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| Properties | |||
| CCl3CF3 | |||
| Molar mass | 187.376 g/mol | ||
| Appearance | Colourless liquid | ||
| Density | 1.579 g/mL[1][2] | ||
| Melting point | 13â14 °C (55â57 °F; 286â287 K) | ||
| Boiling point | 46 °C (115 °F; 319 K) | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Ozone depletion
A team of researchers at the University of East Anglia analysed unpolluted air samples from Tasmania dating from the period 1978 to 2012. They concluded that the CFCs[which?] they studied had started entering the atmosphere from anthropogenic sources in the 1960s and that while the abundance of certain CFCs had decreased, owing to the Montreal Protocol, the abundance of CFC-113a in the atmosphere was still growing.[3] Its main source remained uncertain, but production of hydrofluorocarbons in East Asia was suspected.[4] Between 2012 and 2017, concentrations of the gas jumped by 40 percent.[5] In 2020, the global mean concentration of CFC-113a was 1.02 parts per trillion with global emissions of 2.5â±â0.4 ODP-Gg yrâ1.[6]