Dibromotetrafluoroethane
Skeletal formula of dibromotetrafluoroethane
Ball-and-stick model of the dibromotetrafluoroethane molecule
Names
Preferred IUPAC name
1,2-Dibromo-1,1,2,2-tetrafluoroethane
Other names
R-114B2,[1] Halon 2402
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.004.284
EC Number
  • 204-711-9
UNII
  • InChI=1S/C2Br2F4/c3-1(5,6)2(4,7)8
    Key: KVBKAPANDHPRDG-UHFFFAOYSA-N
  • InChI=1/C2Br2F4/c3-1(5,6)2(4,7)8
    Key: KVBKAPANDHPRDG-UHFFFAOYAK
  • BrC(F)(F)C(Br)(F)F
Properties
C2Br2F4
Appearance Colorless liquid
Density 2180 kg/m3 at 20°C
Boiling point 47.3 °C (117.1 °F; 320.4 K)
not soluble in water
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H420
P502
Safety data sheet (SDS) External MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

1,2-Dibromotetrafluoroethane (C2Br2F4) is a haloalkane. It is also known under codenames R-114B2 and Halon 2402. It is a colorless liquid with a boiling point of 47.2 °C. R-114B2 is occasionally used in fire suppression systems. It is highly volatile, passes through soil to air, and can be detected in the parts-per-quadrillion range.[2]

Since July 1, 1994, the Montreal Protocol required all nations or parties that are a party to it to eliminate the production, consumption, and trade of ozone-depleting substances (ODS). Dibromotetrafluoroethane's high ozone-depleting potential (ODP) caused it to be identified as an ODS. Dibromotetrafluoroethane has been prohibited in Canada since July 1, 1994, "except for essential uses or for use as analytical standards".[3]

On November 8, 2008, an accident aboard Russian submarine K-152 Nerpa involving the unintentional activation of a fire suppressant system loaded with R-114B2 resulted in the death of 20 people.[4]

H-2402 measured by the Advanced Global Atmospheric Gases Experiment (AGAGE) in the lower atmosphere (troposphere) at stations around the world. Abundances are given as pollution free monthly mean mole fractions in parts-per-trillion.

Notes

  1. ↑ "Chemical datasheet for dibromotetrafluoroethane". Cameo Chemicals. National Oceanic and Atmospheric Administration. Retrieved November 18, 2008.
  2. ↑ Patent #4725551 and Patent #6817227
  3. ↑ "ARCHIVED - Environment and Climate Change Canada - Pollution and Waste - Dibromotetrafluoroethane". www.ec.gc.ca. Environment and Climate Change Canada.
  4. ↑ Eschel, David (November 11, 2008). "Fire on Board the Russian Navy Akula II Nuclear Submarine kills Twenty Russian Sailors". Defense Update. Archived from the original on January 23, 2009. Retrieved November 15, 2008. Retrieved November 18, 2008.


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