Trichlorofluoromethane

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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 6389
EINECS number 200-892-3
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

Time-series of atmospheric concentrations of CFC-11 (Walker et al., 2000).
Time-series of atmospheric concentrations of CFC-11 (Walker et al., 2000).
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

[edit] External links

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