Can we please have the secret to big nice shards of meth crystals. Tried almost all the recrystalization on the forum but non of them give big crystals.
norm result!
evaporate it for crystallization. wash using Et2O or ethylacetate or petroleum ether (may be with small portion of acetone) on the vacuum filter.
recrystallize (optional) from alcohol or in other pure solvents
Introduction I represent to BB audience Methamphetamine synthesis method of 1-phenyl-2-propanon (P2P) reductive amination by NaBH4. Following method allows obtaining and large batches of product. The hardest problem of this method is the heat generating during exothermic reaction of imine...
It doesn't matter how much it is. The important thing is that the content of the reaction substance in it is the same. For example, you need 100ml 40% methamethanol solution, and you only have 10% methylamethanol solution. You can add 400ml 10% methylamethanol solution to complete the reaction.
Because it's needed to redissolve methylamine in IPA. It's a better option in compare with my write up cuz it allows to get rid of water and increase yield.
Assuming you inadvertently add too much NaBH4 at once and the temperature rises to 30C, is there any way to save it or do you have to restart in any case?
Yes I know I'm a complete idiot... I added another 300ml of IPA to dilute everything again and now it looks like at least something is happening again.
You need to avoid such temperature fluctuations cuz it reduces yield significantly. You can continue this batch. It's worth to get something instead of nothing.