Halons are organic chemical compounds containing one or two carbon atoms, together with bromine and other halogens. The most commonly used are halon 1211 (bromochlorodifluoromethane) and halon 1301 (bromotrifluoromethane). The halons are gases and were widely used in fire extinguishers until there use was banned in 1994 because of the damage they cause the ozone layer.

See also: Bromine, Chlorine, Fluorine, Halogen, Iodine.

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Subjects: Chemistry