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. ^ a b c d NIOSH Pocket Guide to Chemical Hazards. "#0214". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ NLM Hazardous Substances Data Bank entry for [ Dibromodifluoromethane]
  3. ^ Alan Roy Katritzky, Otto Meth-Cohn, Thomas Lonsdale Gilchrist, Charles Wayne Rees (1995), Comprehensive Organic Functional Group Transformations: Carbon with Three Or ..., Elsevier, p. 226, ISBN 0-08-042704-9{{citation}}: CS1 maint: multiple names: authors list (link)
  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.
Allikas: https://en.wikipedia.org/wiki/Difluorodibromomethane
No tags for this post.