Quote from: fractalglobal on July 26, 2013, 08:42 amJust because 2 molecules are near identical, doesn't mean they have the same physical properties. l-meth and d-meth are much more similar than d-meth to N-iso, yet we can easily separate the 2 by fractional recrystallization with chiral tartaric acid. Similarly, the taste is a factor of structure rather than weight. As I understand it, N-iso has a decidedly different taste to meth when smoked.The Pka of meth is 9.9, compared to 9.69 for N-iso, this alone indicates there will be a difference in taste.What I mentioned 5 pages back was my experience with a product I suspected was cut, and the taste difference between the washed product and the evaporated wash, its the basis of my future posts.You are right in your assumption that many IPA washes will remove all N-iso from your meth, the problem is, it'll also remove a fuckload of the meth, just because N-iso is more soluble, doesn't make methamphetamine insoluble in IPA if both are present.As far as the MSDS goes: Yes, all amphetamines are combustable liquids in their basic form. Heat some meth on a piece of foil until it starts vaping, then move the flame into the smoke, it'll catch fire. The same works for amphetamine and MDMA.@SS: this post isn't meant to sound condescending etc. I am pretty fucking happy that someone else is taking an interest in it at all tbh, I'm told my writing style can be somewhat provocative however.No, not at all; I can see how you'd come off that way, but that's not how I took it. Nobody's an expert on everything, there's no shame in knowing less than someone else. I don't feel there is, at least; I mean no one knows more than everyone about everything, it's just impossible. Well, regardless, I know very little about chemistry ::)I'll give it a try later today and see if I can taste a really clear difference. I do try not to vape the stuff though... I always end up feeling like shit whenever I do it, the side effects get worse, etc.. But enough for a taste can't hurt... I mean what's the worst that can happen, right? It's not like I'm an addict or anything...?!  :P