Did a bit of research. I got this off drug-forum but sounds plausable.
Let the record be set straight:
MDMA is one of, if not the most stable recreational drug that exists. Phenethylamines in general are notoriously stable (especially as compared to tryptamines such as psilocybin, or other drugs such as LSD or beta-ketones) because of their low chemical reactivity. MDMA, even if sitting in a half-open baggie on your shelf, in the absence of extreme heat, humidity, etc. will last a lifetime. The same ideas also apply to MDA and MDEA as they have very similar structures, but not to MDMA analogues like bk-MDMA as a ketone introduces a more reactive (less stable) moiety to the molecule.
Regardless, this isn't the best way to store it. Almost any compound will begin to degrade if exposed to the elements for a long period of time. For this reason, MDMA will last the longest (that is, likely even longer than a lifetime) if kept in a cool, dry, dark place; in other words, it should not be stored in an environment which is constantly hot, damp, or bright (UV or incandescent light). Profoundly acidic or basic environments should also be avoided.
For example, it could be stored in a vacuum-sealed bag in a small box or amber vial of some sort, in a shelf in the closet, or perhaps even in the fridge if you feel so inclined. Although storing it in the freezer where moisture could seep in, or around food where mold or something else could do the same could be an issue if left for... 2 centuries.
It can be measured and put into gel capsules, but this is not a great method of storage - capsules are easily crushed, not really airtight, etc., but nevertheless still a viable option. Capsules (as well as capsule filling devices) can be found at headshops, online, supplement stores, herbal or healthfood stores, etc. 'Vegetarian capsules' (gelatin is made from the collagen, an animal protein) can affect absorption - they are often made from cellulose which is difficult for the mammalian body to break down.
It can be stored in honey, which is a good preservative for many things. The same rules about labelling solutions (explained further down) should be followed if it is mixed into any sort of edible substance.
It can be stored in (pure) water, alcohol, and a few other choice solvents. Tap water is not a good idea for long term storage as it can contain impurities that cause degradation. Distilled water is easy to find and very cheap. Keeping it in solution also allows for easy volumetric dosing.
Keep in mind that when storing in solution, depending on temperature, concentration of the solution, etc. (a lot of factors) sometimes MDMA can fall out. This means powder will come out of the solution and can often be seen with the naked eye as it usually will settle to the bottom of the container (although in some more viscous solvents e.g. propylene glycol, it may precipitate but remain suspended). As a rule, higher concentrations, colder temperatures, and length of storage are all directly proportional to the likelihood of precipitation. Even if you don't see visible signs of precipitation:
Read more:
http://www.drugs-forum.com/forum/showthread.php?t=149783#ixzz26Nbqapfa
