Does anyone ever had trouble about potassium permanganate (small amount) with the TSA screeners ?

Thanks
Molf

I took mine out after researching rules for a domestic flight here in Canada. I believe it's a strong oxidizer, which Canadian flight rules prohibit. In fact, the large bottle I have came with a fairly serious-looking warning label and in large amounts is classified as a dangerous substance and special rules apply when transporting it.

On the other hand, in a small bottle labelled, "water purifier," I think you might have better luck.