To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

How to transfigure the Wikipedia

Would you like Wikipedia to always look as professional and up-to-date? We have created a browser extension. It will enhance any encyclopedic page you visit with the magic of the WIKI 2 technology.

Try it — you can delete it anytime.

Install in 5 seconds
4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
Great Wikipedia has got greater.
.
Leo
Newton
Brights
Milds

Dibromodifluoromethane

From Wikipedia, the free encyclopedia

Dibromodifluoromethane
Names
Preferred IUPAC name
Dibromo(difluoro)methane
Other names
Dibromodifluoromethane
Difluorodibromomethane
Carbon dibromide difluoride
Carbon bromide fluoride
Halon 1202
Fluorocarbon 12-B2
FC 12-B2
R 12B2
UN 1941
Freon 12B2
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.000.805 Edit this at Wikidata
EC Number
  • 200-885-5
RTECS number
  • PA7525000
UNII
UN number 1941
  • InChI=1S/CBr2F2/c2-1(3,4)5 checkY
    Key: AZSZCFSOHXEJQE-UHFFFAOYSA-N checkY
  • InChI=1/CBr2F2/c2-1(3,4)5
  • BrC(F)(F)Br
Properties
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 (−150.0 °F; 172.1 K)
Boiling point 22.8 °C (73.0 °F; 295.9 K)
Insoluble
log P 1.99
Vapor pressure 83 kPa at 20 °C
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H420
P502
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
0
0
Flash point Non-flammable[1]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 100 ppm (860 mg/m3)[1]
REL (Recommended)
 TWA 100 ppm (860 mg/m3)[1]
IDLH (Immediate danger)
 2000 ppm[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

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 [ ]
  3. ^ Alan Roy Katritzky, Otto Meth-Cohn, Thomas Lonsdale Gilchrist, Charles Wayne Rees (1995), [[1], p. 226, at Google Books Comprehensive Organic Functional Group Transformations: Carbon with Three Or ...], Elsevier, p. 226, ISBN 0-08-042704-9 {{citation}}: Check |url= value (help)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.

External links

This page was last edited on 1 December 2023, at 10:11
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.
Contact WIKI 2
Introduction
Terms of Service
Privacy Policy