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Bromochlorodifluoromethane (BCF), also referred to by the code numbers Halon 1211 and Freon 12B1, is a haloalkane with the chemical formula C F 2 Cl Br. It is used for fire suppression, especially for expensive equipment or items that could be damaged by the residue from other types of extinguishers. [1]
Bromochloromethane or methylene bromochloride and Halon 1011 is a mixed halomethane. It is a heavy low-viscosity liquid with refractive index 1.4808. Halon 1011 was invented for use in fire extinguishers in Germany during the mid-1940s, in an attempt to create a less toxic, more effective alternative to carbon tetrachloride .
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Halon 1011 Formerly in fire extinguishers CH 2 BrCl: Bromochlorodifluoromethane: BCF, Halon 1211 BCF, or Freon 12B1 Halon 1211 CBrClF 2: Bromotrifluoromethane: BTM, Halon 1301 BTM, or Freon 13BI Halon 1301 CBrF 3: Trifluoroiodomethane: Trifluoromethyl iodide Freon 13T1 Organic synthesis CF 3 I: Iodomethane: Methyl iodide Organic synthesis CH 3 I
Halon 1301 and 1211 are being replaced with new halocarbon agents which have no ozone depletion properties and low atmospheric lifetimes, but are less effective. Halon 2402 is a liquid agent (dibromotetrafluoroethane) which has had limited use in the West due to its higher toxicity than 1211 or 1301.
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Bromotrifluoromethane, commonly referred to by the code numbers Halon 1301, R13B1, Halon 13B1 or BTM, is an organic halide with the chemical formula C Br F 3. It is used for gaseous fire suppression as a far less toxic alternative to bromochloromethane .
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