Why not indeed! Ozone is a very powerful oxidizing agent. In acidic environments its oxidizing power is only exceeded by fluorine, which dissolve's glass! Ozone will react with most substances at 25° C, but accidental skin or eye contact would lead to immediate, irreparable tissue damage. It only has a half-life of 2 minutes so must be produced where you want to use it and cannot be stored. It is generally manufactured as a dilute water solution, on-site, but there is a high production cost.Hydrogen Peroxide on the other hand is very stable, if correctly handled. Contact with even trace amounts of metal ions (Mn+2, Fe+2) can cause rapid, explosive decomposition. Dilution with anything other than distilled or de-ionised water will lead to unstable solutions. Contact with any metal other than passive stainless 316L will also cause decomposition. It is a powerful oxidising agent and accidental contact would again result in immediate, irreparable tissue damage.Chlorine Dioxide is nowhere near as powerful oxidising agent, but is sufficiently strong to act as a biocide. It is safe for all uses and contact with skin will cause no damage. It is used as a mouthwash and pet deodoriser.For the extremely chemically minded, the oxidation potential of chlorine dioxide is only 0.954 EoV, compared with acidic ozone 2.07, Hydrogen Peroxide 1.77, Hypochlorite 1.48 and Chlorine 1.36.