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Dibromodifluoromethane

Difluorodibromomethane Carbon dibromide difluoride Carbon bromide fluoride Halon 1202 Fluorocarbon 12-B2 FC 12-B2 R 12B2 UN 1941 Freon 12B2 | 8.7kg/m3 (for gas) | 2.27g/cm3 (for liquid) | NFPA-H = 2 | NFPA-F = 0 | NFPA-R = 0 | NFPA-S =

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.

It is also formed during the fluorination of carbon tetrabromide.

Table of physical properties

PropertyValue
Density, ρ, at 15°C (liquid)2.3063g/cm3
Critical temperature, Tc198.3°C, 471.3K
Critical pressure, pc4.13MPa, 40.8bar
Refractive index, n at 20°C, D1.398
Dipole moment0.7D
Ozone depletion potential, ODP0.4, CCl3F is 1
Global warming potential, GWP231, CO2 is 1

References

References

  1. {{PGCH. 0214
  2. {{HSDB
  3. Alan Roy Katritzky, Otto Meth-Cohn, Thomas Lonsdale Gilchrist, Charles Wayne Rees. (1995). ["Comprehensive Organic Functional Group Transformations: Carbon with Three Or ..."]({{Google books). Elsevier.
  4. 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.
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halomethanes fire-suppression-agents bromofluoroalkanes ozone-depleting-chemical-substances
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