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Acetic Anhydride

Chubba75 said:
Ah good old acetic anhydride.

I remember back in Organic Chemistry 1 having to do the salicylic acid + acetic anhydride reaction to create Aspirin.

The next prac we purified it with a variety of solvents and recrystallized the product, you got marked on how pure it was and how large your crystals were... awesome lab classes organic chem :)

I did that experiment too, but it was just in my general chem lab. Fun procedure though.
 
HYDRO_CHRONIC said:
isnt that like really "watched chemical",i actually saw a online chem site selling it

yes, it is. I'm sure chemical supplies sell it online, but only to licensed/registered labs. If it is being sold otherwise it's probably a scam or LE
 
It is not so watched. It is commonly used in leather processing and in injection molded plastics,etc. Just incorporate as a agribuisiness ,etc. Acetic Anhydride is a very effective glacial acetic acid, which of course common vinegar is a less effective formm. Acetyl Chloride can be used effectively in place of AA but with longer reflux and slightly higher temps. DMM is a catalyst for both that will give you the same results as AA in 10 minutes at room temp.
 
Also, you can reverse engineer it rather simply from pure OTC aspirin. As one said, forming aspirin is a Chem 101 exercise. In E.Europe they used aspirin for Hanka and Chernaya/Braun.
 
rachamim said:
Also, you can reverse engineer it rather simply from pure OTC aspirin. As one said, forming aspirin is a Chem 101 exercise. In E.Europe they used aspirin for Hanka and Chernaya/Braun.

It would take a shit load of aspirin to get any decent supply of AA. It's much easier and more practical for the heroin manufacturers to just get AA. AA is quite common in the locations where heroin is produced, as there is a black market for it.
 
Of course but in E.Europe as you know it was almost impossible to get an glacial acetic acid so they developed a pretty efficient process for netting it. It is also true however that they never manufactured large amounts at any given time so oover all it is not feasible for large scale production. Myself, I WOULD use AA and DMM/DMO. 10 minutes and eliminate the possibility of catastrophic explosion! It works great.
 
Nope, it is a catalyst used in conjunction with glacial acetic acid. With AA you need a reflux apparattus but with the catalyst you are free to shake and bake. Well, not really. Subjectively, I still use a reflux but sans heat. Never use heat with it as the rxn is untested as far as I know.

Maybe I will send you papers on it, you have helped me alot. If you want it, let me know.
 
What about vinegar+distillation+epsom salts? Guerilla chemistry logic, dont hurt me..

Also, what's the process of getting AA from aspirin?

And wow about the DMM really shortening the cooking time down, normally it's hours in AA w/o a catalyst.
 
Acetic anhydride is used in the manufacture of both aspirin and paracetamol (tylenol), the two most common pharmaceuticals in the world. Diversion is the way it's procured.

Anyway, acetic anhydride isn't a drug so what's this doing in "other drugs"? Shouldn't it be in the chemical systhesis and obtaining listed chemicals forum? owait we don't have one of those.
 
Smokester, let's not get this thread closed. It is already walking a fine line.


Rachamim, yes I would really be interested in reading those. It's not that I'll ever put it to use, but I try to learn as much about heroin as possible. Thanks. :)
 
First, I do not think in English so I better give you a heads up on the English equivalent, DMAP, perhaps Phrozen might know it better this way.

Phrozen, yes, if you still do not know DMAP, let me know. As for the process, well, to be honest I had discussed this with previous mods, maybe even Sonic since he has been here so long now,...I was going to post a video on the process, broken down good. That DEA paper everyone and their brother flaunts is like Sigfried, worthless. It is a scant outline and in some places dead wrong. Having seen both commercial production (illicit, would love ot see licit) and SWIM having made it, it is a nice thing. Going to Cambodia in 2 days, week at most, and hope to cross into Laos (they love Israelis for some odd reason, although they gouge the heck out of most) and video opium in the dens still open as well as commercial production if possible. In Laos it is not easily seen, as it is in Burma, and fu$% Burma at this time. I do not think mods will allow it because it borders on pandering as opposed to HR but will upload them to send to you.
 
On how to net it from aspirin, I cannot believe a Westerner would ever do it except as a mad scientist sort of thing so I believe it escapes HR. There is literature on it floating around about it though...Search words would be the Eastern European terms for opiated preperations (Chernaya, Hanka, Braun, Kompot, etc.), as well as the phrase Homemade Opiated Preperations. Alot of it is in Russian, Rumanian, Polish, and Chzeck.
 
Phrozen: Here are some urls for DMAP and its use as a catalyst in acetylation. First, a paper from Aldrich , a data sheet on the chem.

I have edited out this url because it is not working via hyperlink. Go to Sigma Aldrich's main site and simply use the site seach engine for DMAP and you will get an on point data sheet.

A wiki, which are usually worthless but this one is on point:

www.en.wikipedia.org/wiki/DMAP

Finally, the man who made it all happen, the famed Klemenck, whom I would give my left arm to have known in the communist era. The man is a personal hero of mine. His paper:

www.designer-drug.com/pte/12.162.180.114/dcd/pdf/heroin.synthesis.pdf

Questions Phrozen, PM me.

(Edited for url correction per mistype and removal of one url)
 
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HYDRO_CHRONIC said:
isnt that like really "watched chemical",i actually saw a online chem site selling it

well vinegar is acetic acid... the chemical itself is watched but it cant be that hard to make if the precursors arent watched.... and i have heard of acetic acid being used to make acetic anhydride, but the instructions on how they did this were not given out...
 
It is very easy actually, just not effective because of low purity and long time for rxn. A person who wants something can get it, all it takes is a level of intelligence and ingenuity.
 
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