Glubrahnum
Bluelighter
- Joined
- Jan 3, 2017
- Messages
- 366
...but good solubility of the drug and its contaminants does not facilitate purification !Mixing 75:25 hot acetone and hot IPA gives good solubility for the crushed MDMA.
To be most effective at purification, the solvent must differentiate between the desired substance and its contaminants.
If only pure Acetone and IPA are available and they are to be used to purify a contaminated 3,4-MDMA·HCl most effectively, then the impure dry powder should be:
1) Washed with cold Acetone first, and the resulting liquid should be discarded.
2) The remaining solids should be press-dried and dissolved in IPA. All of the solids that do not dissolve in IPA should be discarded (by sedimentation/decantation or filtration).
3) The purified 3,4-MDMA·HCl should be recovered from the IPA solution by evaporation and recrystallization.
Step 1 removes all the impurities that are soluble in Acetone and Step 2 removes all the impurities that are insoluble in IPA.
Mixing Acetone and IPA does not make sense for purification because achieving maximum solubility of the desired drug AND its contaminants is not the goal of purification.
P.S.
Pure acetone is hard to obtain. Drying commercial Acetone with a desiccant or molecular sieves might be easier than buying it.
If the Acetone is not dry, it will adversely affect the yield of the purification.
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