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I will try to find this article back just for the "archives" if I have time. Briefly, it is said MgSO4 exposed for long time in acetone, produces duplicated "mirrored" molecule of acetone that has specific "honey" smell. So it is restricted to hold MgSO4 in acetone for long time. But I'm not a...

Sure. Me personally looking for a way to obtain 99.9% acetone in final price around 10-15 EUR per 1L. If it is not necessary to keep such agent and acetone in the freezer for weeks I would appreciate such suggestion. By the way, I've seen some interesting "research" (can't find it in a wink)...

It is interesting, but to be honest not my case indeed. I don't have enought space to keep reagents and solvents for weeks. May be in the future.

Initially - especially for test - 10 gr of mdma hlc in 100 ml of acetone. Yeld 9.5 gr. Actually the question is if it is possible to dry acetone much better.

Bro, a stupid question. As there is a shortage of 99.9% acetone now, I have to dry 98.5 (purity calculated by boiling point) from grocery store. I tried to dry it with MgSO4 first time in my life. Checked the result with MDMA HCL. 100 ml of "my dry" acetone dissolved 0.5 gr. Is it normal or...

why wouldn't you check molar weight of both? it is not secret file. mdma fb - 193.246 tartaric acid - 150.087

I tried to dry acetone with magnesium sulphate, first time in my life. I didn't have such problem before as I always bought 99.9 from lab store. Now there is a shortage, so I tried to do it myself: dry it with magnesium sulphate 15 gr of magnesium per 1L of acetone (I supposed it is 98,5%...

Thank for the information was planing to use it today... ahahah. Did Sinbad store a history of transactions? What other option for BTC mixing is available now?

Yes, thank you. I forgot it is easy to calculate with Clausius Clapeyron equation. Second question was to those, who already tried to do this. I guess some already tried. Any way, thank you for reminding me basic things.

Does such device efficient for base distillation? If meth, mdma, amph etc base put in the main flask, and vacuum source is strong enough will it distill product fast and pure? As I remember all these bases have boiling points around 200-220C. What vacuum pressure and capacity shall be reached to...

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Is there any empiric data about l and d meth tartrates solubility in petroleum ether or hexane?

I did evaporate acetone from acetone-FB mixture. It is not more difficult than evaporate pet ether after base extraction. And boliling point is less.

Many thanks our dearest @btcboss2022! You inspired me for more research to cook a perfect crystal to please my own tolerance by microdosing.

Actually S+ mdma hcl builds colloid with water as well. Probably it is a special property of any salt of mdma isomer due to complicated molecula sceleton. I described it here in details...

Not always. I noticed solubility of L-tartaric in acetone slightly goes down if T grows more than 15C. I guess, my question was about something like this. When I did MDMA tartrate separation I did it in acetone, and I noticed tartrate salt builds a kind of colloid with unreacted base. So I had...

I don't remember what exactly I was thinking about by that time. Probably the question is why they heating metanol and d-tartrate up with reflux? Does d-tartrate solubility in metanol go down if T grow up?

I saw a marketplace somewhere in darknet, it tests the stuff sold there randomly and posts reports, telling quantitative percentage as precise as 0.01%. I remember my university course of metrology and this also sounds weird for me: i don't believe in Satan Claus and fairy tales. But 1% shall...

Well, there was long discussion somewhere here on BB, and some old members state if we all clandestine chemists care about rest 5% and our buyers, we must go for chromatography. And I agree with this point of view. For TLC I can do 4-5 tests for the same sample and approximate the result...

But in any case 5-10% error is not the thing, we all here are looking for.