Bromotrifluoromethane
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Bromotrifluoromethane | |||||||||||||||
other names |
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Molecular formula | CBrF 3 | |||||||||||||||
Brief description |
colorless and odorless gas |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 148.91 g mol −1 | |||||||||||||||
Physical state |
gaseous |
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density |
6.77 g l −1 (0 ° C) |
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Melting point |
−168 ° C |
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boiling point |
−58 ° C |
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Vapor pressure |
1.43 M Pa (20 ° C) |
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safety instructions | ||||||||||||||||
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MAK |
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Global warming potential |
7154 (based on 100 years) |
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Thermodynamic properties | ||||||||||||||||
ΔH f 0 |
−648.3 kJ / mol |
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Bromotrifluoromethane (also known as Halon 1301 ) is a chemical compound that was used as a refrigerant and fire extinguishing agent.
Extraction and presentation
Bromotrifluoromethane can be obtained by reacting trifluoromethane with bromine .
Various other synthetic methods are also known.
use
Bromotrifluoromethane was introduced as a fire suppressant in the 1960s. Bromotrifluoromethane extinguishes fires at a concentration of 6% by intervening in the radical reaction of the combustion . The compound, which belongs to the group of halogenated hydrocarbons , was classified as harmful to the ozone layer in the Montreal Protocol . Their production is in industrialized countries, u. a. in the European Union , prohibited. However, its use is still permitted under international law.
The gas is also contained in the air with a volume fraction of around 2.5 or a mass fraction of around 13 ppt .
safety instructions
At high concentrations, the gas has a suffocating effect. When burned or heated , the gas can decompose into corrosive and poisonous fluorine and bromine compounds such as fluorine and hydrogen bromide .
See also
Individual evidence
- ↑ a b c d e f g h i Entry on bromotrifluoromethane in the GESTIS substance database of the IFA , accessed on January 9, 2019(JavaScript required) .
- ↑ Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for 75-63-8 or bromotrifluoromethane ), accessed on November 2, 2015.
- ↑ G. Myhre, D. Shindell et al .: Climate Change 2013: The Physical Science Basis . Working Group I contribution to the IPCC Fifth Assessment Report. Ed .: Intergovernmental Panel on Climate Change . 2013, Chapter 8: Anthropogenic and Natural Radiative Forcing, pp. 24-39; Table 8.SM.16 ( PDF ).
- ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Standard Thermodynamic Properties of Chemical Substances, pp. 5-18.
- ^ CR Noller: Textbook of Organic Chemistry . Springer-Verlag, 2013, ISBN 978-3-642-87324-9 , pp. 975 ( limited preview in Google Book search).
- ↑ TJ Brice, WH Pearlson, JH Simons: Fluorocarbon bromide. In: Journal of the American Chemical Society. 68, 1946, p. 968, doi: 10.1021 / ja01210a017 .
- ^ Alan R. Katritzky, Thomas L. Gilchrist, Otto Meth-Cohn, Charles Wayne Rees: Comprehensive Organic Functional Group Transformations: Synthesis: carbon with three or four attached heteroatoms . Elsevier, 1995, ISBN 0-08-042704-9 , pp. 218 ( limited preview in Google Book search).
- ^ Assembly of Life Sciences (US). Advisory Center on Toxicology: Toxicological Reports . S. 76 ( limited preview in Google Book search).
- ↑ Herwig Hulpke, Herbert A. Koch, Reinhard Nießner: RÖMPP Lexicon Environment, 2nd edition, 2000 . Georg Thieme Verlag, 2014, ISBN 3-13-736502-3 , p. 169 ( limited preview in Google Book search).
- ↑ Ralf Koppmann: Volatile Organic Compounds in the Atmosphere . John Wiley & Sons, 2008, ISBN 0-470-99415-0 , pp. 190 ( limited preview in Google Book Search).