Thankfully you can still get stuff at the hardware store. The plumbing supply section has copper sulfate, sodium hydroxide, and sulfuric acid. The pool supply section has 10 molar hydrochloric acid. The garden section has sulfur. The paint section has xylene, acetone, and methanol.
For example, you can purify garden sulfur by recrystallizing it with xylene. This is plenty dangerous, since xylene is almost like gasoline (a bit less volatile) and you'll be heating it up nearly to boiling. The aromatic ring structure is required; most other solvents produce deadly hydrogen sulfide gas.
For example, you can purify garden sulfur by recrystallizing it with xylene. This is plenty dangerous, since xylene is almost like gasoline (a bit less volatile) and you'll be heating it up nearly to boiling. The aromatic ring structure is required; most other solvents produce deadly hydrogen sulfide gas.