Allotropy is the property by virtue of which an element may exist in different forms in same physical state differing in physical properties and also to some extent in chemical properties.
Ozone can be used as a strong germicide and disinfectant, sterilizing agent, to purify atmosphere in underground railways, tunnels, mine, kitchens, slaughter houses, theaters etc. and in ozonolysis of organic compounds to get carbonyl compounds. Ozone is used for bleaching ivory, wax, and delicate fabrics. It's also used in the production of synthetic camphor and artificial silk.