Posted By Jane Blunt Ozone is not stable, so you don't buy it as such. I imagine your colleagues are proposing to buy a machine to make it. As a chemical it is hazardous to health and inhalation should be prevented - it does have an occupational exposure limit. It is a strong oxidising agent and can react violently with organic compounds if it is present in a high enough concentration. At high temperatures it can also decompose violently. Even in quite modest concentrations it may attack things made from rubber that you have in the vicinity, so that they perish prematurely. It decomposes to oxygen very readily. You don't say what your colleagues are wanting to use it for, sterilisation? deodorising? Jane