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halon |
Also found in: Encyclopedia, Wikipedia, Hutchinson | 0.01 sec. |
halon [ˈhælɒn] n (Chemistry) any of a class of chemical compounds derived from hydrocarbons by replacing one or more hydrogen atoms by bromine atoms and other hydrogen atoms by other halogen atoms (chlorine, fluorine, or iodine). Halons are stable compounds that are used in fire extinguishers, although they may contribute to depletion of the ozone layer
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Halons have been used for years in many kinds of fire-extinguishing systems. The most common chemicals include chlorofluorocarbons (CFCs), halons and chlorine-based solvents that have been used for more than 30 years as refrigerants, cleaning agents, spray propellants, foams and fire extinguishers. Bromine in the atmosphere comes principally from halons and methyl bromide. |
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