Trichlorofluoromethane
From Wikipedia, the free encyclopedia
Trichlorofluoromethane | |
---|---|
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 | C(F)(Cl)(Cl)Cl |
InChI | 1/CCl3F/c2-1(3,4)5 |
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 disclaimer and references |
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.
Contents |
[edit] 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.
[edit] 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) |
[edit] See also
- Haloalkane
- Halomethane
- Chlorofluorocarbon
- Tetrafluoromethane
- Dichlorodifluoromethane
- Chlorotrifluoromethane] (Tetrachloromethane)