I cannot figure out why it is that when that spills on my hand the pain is clear, but directly on my brain coral its literally no effect if washed out fast. there is a zero lag time for skin burn, that stuff is mean. it should not be avail OTC, nor as a bath additive, and that's how nature health stores sell the 35% in the refrigerated section. some stores sell it as a fruit pre wash, where it is quite good. laundry additive, quite good. beats oxyclean fifty times over.
one spill into a lap accidentally is a burn so caustic again I cannot believe minor children can purchase that stuff in a health food store. handy reef additive it is. I personally would not keep 35% in any home where small children are there, even if it is put up.
