It's wild, I can walk into almost any store and buy sulfuric acid right now, no I'd or anything. You don't even have to be 18. Ace hardware sells "rooto" brand ( and other places) that is above 95% for $13/500ml. Once I was doing God knows what with some H²So⁴, and I saw a puff of smoke. I jumped up and stripped and started the 15 minute rinse. 1 drop landed on my knee and burnt a hole in me ¼" deep in under 10 seconds, through my jeans