Thanks for the reply!! You're right, it's really hard to define, maybe I should ask the question how much distilled water should I dilute the ClO2 with so that there is no damage to the skin in any case. This would also be questionable, because someone could write that you dilute 1 drop with 1000 drops and it certainly wouldn't cause problems, but I don't care. If I spray an injury with 3% H2O2, wound healing is accelerated and infection does not occur. Well, I would like to achieve something like that with ClO2, since H2O2 has a potential of 2.1 and ClO2 is 0.97, which means it is better for the skin. Thank you for your time!