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IUPAC name Dibromodifluoromethane
Other names Difluorodibromomethane, Carbon dibromide difluoride, Carbon bromide fluoride, Halon 1202, Fluorocarbon 12-B2, FC 12-B2, R 12B2, UN 1941
CAS number 75-61-6
PubChem 6382
EINECS number 200-885-5
RTECS number PA7525000
InChI InChI=1/CBr2F2/c2-1(3,4)5
Molecular formula 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


Boiling point

22.8 °C

Solubility in water Insoluble
log P 1.99
Vapor pressure 83 kPa at 20 °C
Main hazards Dangerous for the environment (N)
NFPA 704
S-phrases S23, S24/25
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Dibromodifluoromethane is a mixed halomethane. It is a colorless non-flammable liquid.

Among halons 1211, 2402 and 1301 it is the most effective fire extinguishers, however, also the most toxic one.

It is a class I ozone depleting substance (ODS).

Table of physical properties

Property Value
Density (ρ) at 15 °C (liquid) 2.3063
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)

See also

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Dibromodifluoromethane". A list of authors is available in Wikipedia.
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