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{{short description|Device that releases oxygen via a chemical reaction}}
A '''chemical oxygen generator''' is a device that releases [[oxygen]] via a [[chemical reaction]]. Oxygen is the primary source of oxygen because it is. The oxygen source is usually an inorganic [[superoxide]],<ref>Hayyan M., Hashim M.A., AlNashef I.M., Superoxide Ion: Generation and Chemical Implications, Chem. Rev., 2016, 116 (5), pp 3029–3085. [[DOI: 10.1021/acs.chemrev.5b00407]]</ref> [[chlorate]], or [[perchlorate]]; [[ozonide]]s are a promising group of oxygen sources. The generators are usually ignited by a [[firing pin]], and the chemical reaction is usually [[exothermic]], making the generator a potential [[fire hazard]]. [[Potassium superoxide]] was used as an oxygen source on early manned missions of the [[Soviet space program]], for [[firefighting|firefighters]], and for [[mine rescue]].
== In commercial airliners ==
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