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==Oxygen candle==
A chlorate candle, or an '''oxygen candle''', is a cylindrical chemical oxygen generator that contains a mix of [[sodium chlorate]] and [[iron]] powder, which when ignited [[smoldering|smolders]] at about {{convert|600|°C|°F|abbr=on}}, producing [[sodium chloride]], [[iron oxide]], and at a fixed rate of about 6.5 man-hours of oxygen per kilogram of the mixture. The mixture has an indefinite shelf life if stored properly: candles have been stored for 20 years without decreased oxygen output. [[Thermal decomposition]] releases the oxygen. The burning iron supplies the heat. The candle must be wrapped in [[thermal insulation]] to maintain the reaction temperature and to protect surrounding equipment. The key reaction is:<ref name=G&E>{{Greenwood&Earnshaw2nd}}</ref>
:2 NaClO<sub>3</sub> → 2 NaCl + 3 O<sub>2</sub>
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