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| Trichlorofluoromethane | |
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| IUPAC name | Trichlorofluoromethane |
| Other names | Trichloro(fluoro)methane, Fluorotrichloromethane, Fluorochloroform, Freon 11, CFC 11, R 11, Arcton 9, Freon 11A, Freon 11B, Freon HE, Freon MF |
| Identifiers | |
| CAS number | [75-69-4] |
| PubChem | |
| EINECS number | |
| RTECS number | TB6125000 |
| SMILES |
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| InChI |
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| Properties | |
| Molecular formula | CCl3F |
| Molar mass | 137.37 g/mol |
| Appearance | Colorless liquid/gas |
| Density | 1.494 g/cm3 |
| Melting point |
-110.48 °C |
| Boiling point |
23.77 °C |
| Solubility in water | 1.1 g/l at 20 °C |
| log P | 2.53 |
| Vapor pressure | 89 kPa at 20 °C
131 kPa at 30 °C |
| Hazards | |
| Main hazards | Harmful (Xn), Dangerous for the environment (N) |
| R-phrases | R36/37/38 |
| S-phrases | S23, S26, S36 |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references |
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Trichlorofluoromethane, also called freon-11, CFC-11, or R-11, is a chlorofluorocarbon. It is a colorless, nearly odorless liquid that boils at about room temperature.
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Uses
It was the first widely used refrigerant. Because of its high boiling point (compared to most refrigerants), it can be used in systems with a low operating pressure, making the mechanical design of such systems less demanding than that of higher-pressure refrigerants R-12 or R-22.
Because of the high chlorine content and the ease with which the chlorine atoms can be displaced when the molecule is subject to ultraviolet light, R-11 has the highest ozone depletion potential of any refrigerant, by definition assigned the value 1.0. U.S. production was ended in 1995.
Trichlorofluoromethane is used as a reference compound for fluorine-19 NMR studies.
Table for physical properties
| Property | Value |
|---|---|
| Density (ρ) at 0 °C | 1.5432 g.cm-3 |
| Density (ρ) at 18.82 °C | 1.4905 g.cm-3 |
| Critical temperature (Tc) | 198 °C (471 K) |
| Critical pressure (pc) | 4.410 MPa (44.1 bar) |
| Critical density (ρc) | 4.151 mol.l-1 |
| Refractive index (n) at 20 °C, D | 1.3821 |
| Acentric factor (ω) | 0.18875 |
| Dipole moment | 0.450 D |
| Ozone depletion potential (ODP) | 1 (by definition) |
| Global warming potential (GWP) | 4600 (CO2 = 1) |
See also
- Haloalkane
- Halomethane
- Chlorofluorocarbon
- Tetrafluoromethane
- Dichlorodifluoromethane
- Chlorotrifluoromethane
- Tetrachloromethane
External links
- MSDS at Oxford University
- Public health goal for trichlorofluoromethane in drinking water
- Names at webbook.nist.gov
- Data sheet at speclab.com
- International Chemical Safety Card 0047
- NIOSH Pocket Guide to Chemical Hazards 0290
- Phase change data at webbook.nist.gov
- Termochemistry data at chemnet.ru
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- This page was last modified on 14 June 2008, at 13:30.
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