you can find 99% isopropyl in many stores... its used a lot for cleaning electronics because it evaporates so quickly. you dont need to purify it. even if you can only find 91% thats ok, the other 9% is just water. using distilled/deionized h20 would probably not work so well.. water is not as reliable a solvent as alcohol, especially without heat. you could possibly burn up the extract if you let