phase_dancer
Bluelight Crew
Didnt say that crystallization was a synthesis![]()
Well what we're you referring to here then?
Its goin to much towards synthesis.
I just read the whole thread again and I can't seem to find any talk of synthesis. In fact it's all about purity of the end product, other than perhaps my comment on page 2 referring to distilling the freebase - which of course is also not a synthesis.
It seems there's quite a lot of debate on what constitutes a pure product. The bottom line is, a slower crystallisation is more selective so can purify a product.
However, tricks can be played employing a cut and certain mixtures of solvents, coupled with things like controlling temp, vacuum etc.
But don't forget, when talking about meth or mdma, or for that matter, phenethylamines in general, that these are amines, able to be formed into salts. That usually presents a considerable advantage when talking about purification, as generally speaking, they are easily purified by changing the form and thus the solubility. This is done through Acid /Base recrystallisations (although a fine crystal powder might be the end product). This works because impurities will likely not have a similar solubility in both polar and non-polar solvents.
The amine salt is made to be insoluble in polar solvents (e.g water, organic acids etc) by treating with a alkali (usually to ~pH10). The water soluble impurities are then washed out with water or a similar polar solvent. Following that, the fb is again protonated (e.g. with HCl) to again form a salt, which is insoluble in non-polar solvents such as hexane or petroleum ether. So washing with these solvents will remove impurities that are soluble in non-polar solvents, leaving behind the amine salt. With a simple amine like meth or mdma, repeating the process a few times would produce a very pure product, although some product is always lost.
All this stuff is pretty standard 1st or 2nd year organic chem and can be found in most good textbooks.
....is powdered mdma just small crystals or is it a completely different end product?
Yes, it's small crystals

