MDMA crystals shelf life?

With appropriate storage (cool, dry, dark) they are durable forever. It is then, of course, that the period during which one is punishable for the possession of this substance is correspondingly long.

As far as purity is concerned, please address the issue of drug checking. In the black market, what is exactly included or how much exactly is included is not sure. Information here: https://www.eve-rave.org/drogen-abc/drugchecking/

If you suspect that this stuff could be manipulated, you shouldn’t take it under any circumstances.

General information about the typical effects and side effects as well as the risks associated with the use of MDMA can be found here:

• https://www.saferparty.ch/substances/mdma
• https://drugscouts.de/lexikon/mdma
• https://psychonautwiki.org/wiki/mdma