Bromotrifluoromethane

Structural formula
General
Surname	Bromotrifluoromethane
other names	Bromofluoroform Trifluoromethyl bromide Trifluorobromomethane R13 B1 Halon 1301 (H 1301) Freon FE
Molecular formula	CBrF 3
Brief description	colorless and odorless gas
External identifiers / databases
CAS number 75-63-8 EC number 200-887-6 ECHA InfoCard 100,000,807 PubChem 6384 Wikidata Q413018
properties
Molar mass	148.91 g mol −1
Physical state	gaseous
density	6.77 g l −1 (0 ° C)
Melting point	−168 ° C
boiling point	−58 ° C
Vapor pressure	1.43 M Pa (20 ° C)
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 280-336-420 P: 261-304 + 340-312-410 + 403-501
MAK	DFG : 1000 ml m −3 or 6200 mg m −3 Switzerland: 1000 ml m −3 or 6100 mg m −3
Global warming potential	7154 (based on 100 years)
Thermodynamic properties
ΔH f 0	−648.3 kJ / mol
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

Bilingual warning sign on board a ship

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

• Freon

Individual evidence

1. ↑ ^{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) .
2. ↑ Swiss Accident Insurance Fund (Suva): Limit values ​​- current MAK and BAT values (search for 75-63-8 or bromotrifluoromethane ), accessed on November 2, 2015.
3. ↑ 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 ).
4. ↑ 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.
5. ^ CR Noller: Textbook of Organic Chemistry . Springer-Verlag, 2013, ISBN 978-3-642-87324-9 , pp. 975 ( limited preview in Google Book search).
6. ↑ TJ Brice, WH Pearlson, JH Simons: Fluorocarbon bromide. In: Journal of the American Chemical Society. 68, 1946, p. 968, doi: 10.1021 / ja01210a017 .
7. ^ 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).
8. ^ Assembly of Life Sciences (US). Advisory Center on Toxicology: Toxicological Reports . S. 76 ( limited preview in Google Book search).
9. ↑ 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).
10. ↑ 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).