臭氧化反应，有机合成中重要的反应之一。是实现烯烃官能团向醛酮官能团转化的手段之一。

烯烃的臭氧化反应最早于1840年由Christian Friedrich Schönbein发现。在有机化学发展的早期被广泛用来作为推测有机物未知结构的重要降解手段。

Ozonolysis is an organic reaction where the unsaturated bonds of alkenes, alkynes, or azo compounds are cleaved with ozone. Alkenes and alkynes form organic compounds in which the multiple carbon–carbon bond has been replaced by a carbonyl group while azo compounds form nitrosamines. The outcome of the reaction depends on the type of multiple bond being oxidized and the work-up conditions.