Trichlorofluoromethane

R-11 redirects here, for the ballistic missile, see Scud.

Trichlorofluoromethane, also called freon-11, CFC-11, or R-11, is chlorofluorocarbon. It is a colorless, nearly odorless liquid that boils at about room temperature.

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)

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

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 (1.0) of any refrigerant, which has been assigned to 1.0 by definition. U.S. production was ended in 1995.

Trichlorofluoromethane is used as a reference compound for fluorine-19 NMR studies.

See also

• Haloalkane
• Halomethane
• Chlorofluorocarbon
• Tetrafluoromethane
• Dichlorodifluoromethane
• Chlorotrifluoromethane
• Carbon tetrachloride (Tetrachloromethane)

External links

• Safety MSDS data
• 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". National Institute for Occupational Safety and Health (NIOSH).
• Phase cahnge data at webbook.nist.gov
• Termochemistry data at chemnet.ru