It is nice working for a university with a friendly Chemistry Dept. I have a pound of Potassium clorate that is one semi-solid chunk. When I needed a small amount, I gave a call over to the Chemistry folks to 1) make sure that its age would not be a factor and 2) if it was safe to knock off a chunk. I was told it would be fine, and not to use too big of a hammer.
Kodak Rapid Fixer Part B (hardener) will eat thru your clothes nicely -- lost a pair of jeans that way years ago.