Trichloro(fluoro)methane, Fluorotrichloromethane, Fluorochloroform, Freon 11, CFC 11, R 11, Arcton 9, Freon 11A, Freon 11B, Freon HE, Freon MF
|Molar mass||137.37 g·mol−1|
|Melting point||−110.48 °C (−166.86 °F; 162.67 K)|
|Boiling point||23.77 °C (74.79 °F; 296.92 K)|
|1.1 g/L (at 20 °C)|
|Vapor pressure||89 kPa at 20 °C
131 kPa at 30 °C
|EU Index||Not listed|
|US health exposure limits (NIOSH):|
|TWA 1000 ppm (5600 mg/m3)|
|C 1000 ppm (5600 mg/m3)|
IDLH (Immediate danger)
|Supplementary data page|
|Refractive index (n),
Dielectric constant (εr), etc.
|UV, IR, NMR, MS|
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
|what is: / ?)(|
Trichlorofluoromethane, also called freon-11, CFC-11, or R-11, is a chlorofluorocarbon. It is a colorless, faint ethereal and sweetish odor liquid that boils at about room temperature.
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.
R-11 is assigned an ozone depletion potential of 1.0. U.S. production was ended in January 1, 1996.
Trichlorofluoromethane is used as a reference compound for fluorine-19 NMR studies.
Prior to the knowledge of the ozone depletion potential of chlorine in refrigerants and other possible harmful effects on the environment, trichlorofluoromethane was sometimes used as a cleaning/rinsing agent for low pressure systems, often dumping the used and "dirty" liquid.
- CFC-11 NOAA/ESRL Global measurements
- 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 change data at webbook.nist.gov
- Thermochemistry data at chemnet.ru
- ChemSub Online: Trichlorofluoromethane - CFC-11