Ozone is used in lots of applications here in USA. Most of the bottled water is OZONATED. Atheltic swimming pools are increasingly being switched from chlorine to ozone for health reasons. I am working on a project where I am using ozone. Anything at a certain concentration is toxic.Sure. Chlorine is also toxic at a comparable level to ozone. If you are working with ozone, please (for your own safety) read the link to the Centers for Disease Control I posted earlier in the thread.
thanks for the warning - i too am professorial and my lab and the efforts of my technicians are sufficiently vented.