Dibromodifluoromethane
Names | |
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Preferred IUPAC name
Dibromo(difluoro)methane | |
Other names
Dibromodifluoromethane
Difluorodibromomethane Carbon dibromide difluoride Carbon bromide fluoride Halon 1202 Fluorocarbon 12-B2 FC 12-B2 R 12B2 UN 1941 Freon 12B2 | |
Identifiers | |
3D model (JSmol)
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ChEMBL | |
ChemSpider | |
ECHA InfoCard | 100.000.805 |
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PubChem CID
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RTECS number |
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CompTox Dashboard (EPA)
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Properties | |
CBr2F2 | |
Molar mass | 209.82 g/mol |
Appearance | Colourless gas/liquid |
Density | 8.7 kg/m3 (for gas)
2.27 g/cm3 (for liquid) |
Melting point | −101.1 °C (−150.0 °F; 172.1 K) |
Boiling point | 22.8 °C (73.0 °F; 295.9 K) |
Insoluble | |
log P | 1.99 |
Vapor pressure | 83 kPa at 20 °C |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards
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Dangerous for the environment (N) |
NFPA 704 (fire diamond) | |
Flash point | nonflammable [1] |
NIOSH (US health exposure limits): | |
PEL (Permissible)
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TWA 100 ppm (860 mg/m3)[1] |
REL (Recommended)
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TWA 100 ppm (860 mg/m3)[1] |
IDLH (Immediate danger)
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2000 ppm[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Dibromodifluoromethane is a mixed halomethane. It is a colorless non-flammable liquid.
Along with Halons 1211, 2402, and 1301, it is the most effective fire extinguishers, however, also the most toxic one.[clarification needed]
It is a class I ozone depleting substance (ODS).
Table of physical properties
Property | Value |
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Density (ρ) at 15 °C (liquid) | 2.3063 g.cm−3 |
Critical temperature (Tc) | 198.3 °C (471.3 K) |
Critical pressure (pc) | 4.13 MPa (40.8 bar) |
Refractive index (n) at 20 °C, D | 1.398 |
Dipole moment | 0.7 D |
Ozone depletion potential (ODP) | 0.4 (CCl3F = 1) |
References
External links
- International Chemical Safety Card 1419
- NIOSH Pocket Guide to Chemical Hazards. "#0214". National Institute for Occupational Safety and Health (NIOSH).
- Photolysis of dibromodifluoromethane at 265 nm
- Raman and infrared spectra of solid dibromodifluoromethane