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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 ]
Carbon dioxide can cause severe distress at concentrations of 3–6%, and has caused death by respiratory paralysis in a few minutes at 10% concentration. Halon 1301 causes only slight giddiness at its effective concentration of 5%, and even at 15% those exposed remain conscious but impaired and suffer no long-term effects.
Exposure to Halon 1301 in the 5% to 7% range produces little, if any, noticeable effect. At levels between 7% and 10%, mild central nervous system effects such as dizziness and tingling in the extremities have been reported. [8] In practice, the operators of many Halon 1301 total flooding systems evacuate the space on impending agent discharge.
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 .
Halon 1202 Fluorocarbon 12-B2 FC 12-B2 R 12B2 UN 1941 Freon 12B2. Identifiers CAS Number. 75-61-6 ...
It was released on November 1, 2000, [9] and included in Half-Life 's version 1.1.1.0 update, released on June 12, 2002. [10] Ports of the game to OS X and Linux were released through Steam on August 1, 2013. [11] Science and Industry – A team-based multiplayer mod in which players take the roles of security guards at two competing research ...
2,2-Dichloro-1,1,1-trifluoroethane can be produced by reacting tetrachloroethylene with hydrogen fluoride in the gas phase. This is an exothermic reaction and requires a catalyst: This is an exothermic reaction and requires a catalyst:
Halon 14 (tetrafluoromethane) Halon 2011B (1-bromo-2-chloroethane) Halon 2301 (1,1,1-trifluoro-2-bromoethane) Halon 2311 (1,1,1-trifluoro-2,2-chlorobromoethane, halothane) Halon 242 (1,2-dichlorotetrafluoroethane) Halon 2402 (dibromotetrafluoroethane, C 2 Br 2 F 4)—used as a fire extinguisher; Halon 2501 (pentafluorobromoethane) Halon 2600 ...