sorry henrys,
forgot to look in to see how you got on...
It will not say so on the bottle, as it is a nasal inhalation treatment for cataarh. Trust me (I'm not a doctor - lol), it does work, like other stain removal remedies, of common household items - vinegar to remove tea stains etc.
If you are that much in doubt, put some oil/tar/grease on a old white rag, let it dry, then use the euc oil, and see the results! It has never failed me yet. I don't think that Which? would dare to mention it in their book, do you, if it wasn't safe to use?