Dibromodifluoromethane

Dibromodifluoromethane
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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
Identifiers
CAS number	75-61-6
PubChem	6382
EINECS number	200-885-5
RTECS number	PA7525000
SMILES	C(F)(F)(Br)Br
InChI	InChI=1/CBr2F2/c2-1(3,4)5
Properties
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	-101.1°C
Boiling point	22.8 °C
Solubility in water	Insoluble
log P	1.99
Vapor pressure	83 kPa at 20 °C
Hazards
Main hazards	Dangerous for the environment (N)
NFPA 704	0 2 0
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 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)

See also

• Haloalkane
• Halomethane
• Tetrafluoromethane
• Bromotrifluoromethane
• Tribromofluoromethane
• Tetrabromomethane

External links

• International Chemical Safety Card 1419
• NIOSH Pocket Guide to Chemical Hazards 0214
• Photolysis of dibromodifluoromethane at 265 nm
• Raman and infrared spectra of solid dibromodifluoromethane