I can't say. I have no idea of the effects on herps at low concentrations. I have used it at my work a number of times, respirators and gloves, eye shields and body covering. Pure it is not great. The sheets are not pure and all anyone can do is guess. That is where I become leery why guess when there are proven alternatives?

Actually I just pulled a MSDS sheet on it. No, I would not recommend it, it is a methyl-phenol. Phenols are super effective disinfectants and quite toxic to reptiles. I am sure the amount is very small and it is quite possibly fine but again why take a risk for the sake of saving a few dollars. If you were to use them they need to be rinsed after use they do wash off easily and fully.