methanol will leave impurities -- the acetone and JWH are the only 2 things you want being sprayed.
Why will it leave impurities? I plan on using this method, it uses EtOH but MeOH should work just as well.
TheAzo said:In the vial, i added 1.6ml (2ml/g) 95% EtOH, shook with gentle warming until no specks of yellow were noticed, then chilled, and removed the ethanol. Repeated with three additional 1ml portions of ethanol.
Dried the now pretty white JWH-073 in it's vial by application of gentle heat with the cap off.
Beautiful white clean smelling JWH-073, and 30mg of yellow oil and traces of JWH.
So I'll be removing the methanol containing the impurities from the 073 leaving behind nice clean JWH-073 then dissolving that in acetone.