Spontaneous combustion

Spontaneous combustion or spontaneous ignition is a type of combustion which occurs by self-heating (increase in temperature due to exothermic internal reactions), followed by thermal runaway (self heating which rapidly accelerates to high temperatures) and finally, autoignition. It is distinct (but has similar practical effects to) pyrophoricity, in which a compound needs no self-heat to ignite.

For the spontaneous combustion of humans, see Spontaneous human combustion. For other uses, see Spontaneous combustion (disambiguation).

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