Ozonolysis is the cleavage of an alkene or alkyne with ozone to form organic compounds in which the multiple carbon–carbon bond has been replaced by a double bond to oxygen. The outcome of the reaction depends on the type of multiple bond being oxidized and the workup conditions.
Read more about Ozonolysis: Ozonolysis of Alkenes, Ozonolysis of Alkynes, Ozonolysis of Elastomers