Bromodifluoromethane

Last updated
Bromodifluoromethane
Bromodifluoromethane.png
Names
Preferred IUPAC name
Bromo(difluoro)methane
Other names
  • Bromodifluoromethane
  • Difluorobromomethane
  • Halon 1201
  • HBFC-22B1
  • FC-22B1
  • R-22B1
  • FM-100
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.014.681 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 216-149-1
PubChem CID
UNII
  • InChI=1S/CHBrF2/c2-1(3)4/h1H Yes check.svgY
    Key: GRCDJFHYVYUNHM-UHFFFAOYSA-N Yes check.svgY
  • InChI=1/CHBrF2/c2-1(3)4/h1H
  • C(F)(F)Br
  • BrC(F)F
Properties
CHBrF2
Molar mass 130.92 g/mol
AppearanceGas
Density 1.55 g/cm3 at 16 °C
Melting point −145 °C (−229 °F; 128 K)
Boiling point −14.6 °C (5.7 °F; 258.5 K)
Insoluble
Solubility Alcohol, diethyl ether
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Yes check.svgY  verify  (what is  Yes check.svgYX mark.svgN ?)

Bromodifluoromethane or Halon 1201 or FC-22B1 is a gaseous trihalomethane or a hydrobromofluorocarbon.

Contents

Synthesis

It can be prepared through the reaction of hydrogen and dibromodifluoromethane at temperature in range 400–600 °C. [1]

Critical point data: Tc = 138.83 °C (411.98 K); pc = 5.2 MPa (51.32 bar); Vc = 0.275 dm3·mol−1.

Applications

Bromodifluoromethane was used as a refrigerant and in fire extinguishers. It is a class I ozone depleting substance with ozone depletion potential ODP = 0.74. It was banned by Montreal Protocol in 1996.

Related Research Articles

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The Montreal Protocol on Substances That Deplete the Ozone Layer is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion. It was agreed on 16 September 1987, and entered into force on 1 January 1989. Since then, it has undergone nine revisions, in 1990 (London), 1991 (Nairobi), 1992 (Copenhagen), 1993 (Bangkok), 1995 (Vienna), 1997 (Montreal), 1999 (Beijing) and 2016 (Kigali). As a result of the international agreement, the ozone hole in Antarctica is slowly recovering. Climate projections indicate that the ozone layer will return to 1980 levels between 2040 and 2066. Due to its widespread adoption and implementation, it has been hailed as an example of successful international co-operation. Former UN Secretary-General Kofi Annan stated that "perhaps the single most successful international agreement to date has been the Montreal Protocol". In comparison, effective burden-sharing and solution proposals mitigating regional conflicts of interest have been among the success factors for the ozone depletion challenge, where global regulation based on the Kyoto Protocol has failed to do so. In this case of the ozone depletion challenge, there was global regulation already being installed before a scientific consensus was established. Also, overall public opinion was convinced of possible imminent risks.

<span class="mw-page-title-main">Ozone</span> Allotrope of oxygen (O₃) present in Earths atmosphere

Ozone is an inorganic molecule with the chemical formula O
3
. It is a pale blue gas with a distinctively pungent smell. It is an allotrope of oxygen that is much less stable than the diatomic allotrope O
2
, breaking down in the lower atmosphere to O
2
(dioxygen). Ozone is formed from dioxygen by the action of ultraviolet (UV) light and electrical discharges within the Earth's atmosphere. It is present in very low concentrations throughout the atmosphere, with its highest concentration high in the ozone layer of the stratosphere, which absorbs most of the Sun's ultraviolet (UV) radiation.

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References

  1. "Method for the production of bromodifluoromethane". Archived from the original on 2007-10-14. Retrieved 2007-05-24.