Methamphetamine is C10H15N. Isopropylbenzylamine is C10H15N. Molar mass of methamphetamine is 149.23g/mol. Isopropyl is 149.23g/mol. They're virtually identical; meth melts at 170-175 degrees. Depending on whether I'm dealing with methylbenzylamine, ethylbenzylamine, or isopropylbenzylamine, the cut melts between 180-190 degrees.None, to my knowledge, are acetone soluble. Meaning acetone will do nothing but leech equal parts cut & meth from my product. That's not exactly what I'm after.I was rather hoping for something I could apply en masse, as it were. But I'll be totally frank: I have absolutely no clue why in the name of God I'd want to concentrate butane and then ignite it. Exactly what is that supposed to do, other than cause a small burst of flame? I can't imagine how that would do anything except effect the very surface of the product... hrm...