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Depends what you want. Probably this crystallization in water is the best to get big crystals. I really love, many thanks to author. But you will not get your crystals to much pure as there is no a lot of solvent. It is not for purification, it is to get final product. Some people report they...

Yeah! This is why I asked. I know exact solubility of L-tartaric in acetone. I got it empirically ;)

Normally I keep a batch of powder, and crystallize it on demand. I mean from the same batch of powder I get normal crystals, and such watery crystals. So it is not about impurities, that's for sure. But it doesn't happen often, may be 2-3 times. May be air was too dry during that days, i don't...

Bro, ask your DrugGPT just for fun: 1. what is cocaine HCl solubility in acetone at 20 C 2. what is L-tartaric acid solubility in acetone at 20 C May be this superbrain knows exact answers;)

If I understand it correctly, T must be kept 8-10C while all the stirring process. What is expected ice consumption for 20-30L jacketed reactor used with a pump, submerged to a ice bath? Or this is wrong concept, and better to target for flow electric cooler?

@G.Patton general, is there any advantage to use Methylamine aqueous solution cas 74-89-5 against Methylamine HCl cas 593-51-1 + NaOH?

Nop. This MDMA data it got empirically.

Funny, but MDP2P cas 4676-39-5 and NaBH4 here are used in molar proportions 5.78 (1000 gr) : 2.56 (100 gr). Is it a mistake?

Never cryctallized in DCM. Do you mean, solubility is less if heated?

I checked a guidebook briefly, it's said it's slightly soluble in acetone, but I not said what proportions. Also said is well soluble in methanol and chloroform. The only question is how it's solubility changes with temperature: you need to recover it back from solvent.

You may consider to dissolve it water, then add acetone 5-10 volumes of water and move to the freezer. I'm sure you will get some crystals out, but not sure about your yeld. Different substances - diffferent properties. With MDMA you would get around 95% from water acetone in such proportions...

Are you sure? Interesting. I guess as cloryde salt that contains oxigen it shall be dissolved in hot acetone around 40-50c. Same as MDMA: barely dissolved in cold, but you can easily dissolve 1 gr in 3-4 ml of hot.

Looking to a crypto to BLIK exchanger in Poland without KYC. Is there any, or all fired? Any suggestion, folks?

Ok. I messaged you. May be it will be faster if done manually.

Do you mean 1.3 kg of base or hydrochloride?

Yeah, bro!!! It is *****ing weird, but all I see in my neighboring countries (EU) is 250 EUR per 100 gr. In China it is about 10 EUR per 100 gr. *****'s sake, what is going on with this world?!!!

Looking for D-tartaric acid cas 147-71-7 in relatively small amount (just for tests, 500 gr enough) in the EU with price little less than 200 EUR per 100 gr))))) Is it possible to get?

Last time I got the result after THREE weeks after arrival of sample, indeed. This time one sample arrived in accordance with tracking on 11th. Still no result. Another sample arrived in accordance with tracking on 16th, but not yet in your system, hahaha. You really need to something with it...

I guess, considering this experience, isomers separation must be done completely without water. It is possible to do in puure acetone. MDMA FB is well soluble in acetone. At the same time, L-tartaric also soluble in acetone in proportions 14.6 gr of acetone per 1.0 gr of L-tartaric at RT. And...

I did try to recrystallize isomers from both S and R leftovers in water as oversaturated solutions to get "big" crystals - hahaha.. *****ing jewellery work considering small amounts of samples. Here you can see a crystal of S isomer after crystallization for example. Same after washing in...