Ozone is basically the triatomic form of the element oxygen. It is a gas with the formula O3. It is a "bent" shaped molecule with one double bond and one single bond. It is not a stable molecule and over time will decompose to regular molecular oxygen O2. Because of this, ozone is not purchased from a supplier but is generated in a lab for direct use.
Ozone is produced in nature from O2 through both the effect of ultraviolet radiation from the Sun and from electricity through lightning. In a laboratory setting, ozone is produced by a machine called an ozonizer. It takes a cylinder of O2 and feeds it through a high voltage electrical current. The electricity converts the O2 to O3 as shown below:
3O2 + electricity --> 2O3
The ozone that flows out of the ozonizer is then used directly in a chemical reaction. The most common chemical reaction involving ozone is called ozonolysis. It involves the oxidation and ultimate cleavage of a carbon carbon double bond.