Chemistry:Dibromodifluoromethane
From HandWiki
| |
| Names | |
|---|---|
| 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)
|
|
| ChEMBL | |
| ChemSpider | |
| EC Number |
|
PubChem CID
|
|
| RTECS number |
|
| UNII | |
| UN number | 1941 |
| |
| |
| Properties | |
| CBr2F2 | |
| Molar mass | 209.82 g/mol |
| Appearance | Colourless gas/liquid |
| Density |
|
| 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 | |
| GHS pictograms | 
|
| GHS Signal word | Warning |
| H420 | |
| P502 | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable [1] |
| NIOSH (US health exposure limits): | |
PEL (Permissible)
|
TWA 100 ppm (860 mg/m3)[1] |
REL (Recommended)
|
TWA 100 ppm (860 mg/m3)[1] |
IDLH (Immediate danger)
|
2000 ppm[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
 verify (what is   ?)
| |
| Infobox references | |
Tracking categories (test):
Dibromodifluoromethane is a mixed halomethane. It is a colorless non-flammable liquid. Along with Halons 1211, 2402, and 1301, it is one of the most effective fire extinguishers, however, it is also very toxic. It is a class I ozone depleting substance (ODS).
Synthesis
Dibromodifluoromethane can be obtained by vapor phase bromination of difluoromethane.[2]
It is also formed during the fluorination of carbon tetrabromide.[3]
Table of physical properties
| Property | Value |
|---|---|
| Density, ρ, at 15 °C (liquid) | 2.3063 g/cm3 |
| 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 is 1 |
| Global warming potential, GWP | 231, CO2 is 1[4] |
References
- ↑ 1.0 1.1 1.2 1.3 NIOSH Pocket Guide to Chemical Hazards. "#0214". National Institute for Occupational Safety and Health (NIOSH). https://www.cdc.gov/niosh/npg/npgd0214.html.
- ↑ Template:HSDB
- ↑ Alan Roy Katritzky, Otto Meth-Cohn, Thomas Lonsdale Gilchrist, Charles Wayne Rees (1995), [[1], p. 226, at Google Books Comprehensive Organic Functional Group Transformations: Carbon with Three Or ...], Elsevier, pp. 226, ISBN 0-08-042704-9, [2], p. 226, at Google Books
- ↑ Hodnebrog, Ø., M. Etminan, J. S. Fuglestvedt, G. Marston, G. Myhre, C. J. Nielsen, K. P. Shine, and T. J. Wallington (2013), ‘Global warming potentials and radiative efficiencies of halocarbons and related compounds: A comprehensive review,’ Reviews of Geophysics, vol. 51, pp. 300-378, doi:10.1002/rog.20013.
External links
- International Chemical Safety Card 1419
- NIOSH Pocket Guide to Chemical Hazards. "#0214". National Institute for Occupational Safety and Health (NIOSH). https://www.cdc.gov/niosh/npg/npgd0214.html.
- Photolysis of dibromodifluoromethane at 265 nm
- Raman and infrared spectra of solid dibromodifluoromethane
 |  |
