Acetone - Can it already be anhydrous when purchased?
The acetone you have ($99.9~\%$) may be pretty pure but is certainly not dry (anhydrous). The dry solvents we have in the lab are typically marked as $< 50~\mathrm{ppm}\ \ce{H2O}$, which in percent would be $< 0.00005~\%$. In your acetone, however, there are $0.1~\%$ impurities, likely a large amount of which would be water.
Reaction of glucose acetal with acetic anhydride
2020年9月8日 · Starting from any cyclic form of glucose, there are two key ways to form the acetal in sequence (i). Taking glucopyranose as a starting point, here is a reaction scheme:
What do the different grades of chemicals mean?
Several liters can be processed daily by one person with a 3-5L flask, a stillhead, and the other general kit involved. Our cost per liter including KMnO4 and a little silica xerogel is under one US dollar. After a day or two in a sealed bottle over a little dessicant and POW. HPLC suitable acetone, clean $\endgroup$ –
Cocaine Le Junk's Cocaine Purification Megathread v. The Final Word
2007年9月17日 · not to worry, if your unable or unwilling to obtain acetone via a chemical supply company, there is a legitimate alternative. you can make hardware or home store acetone anhydrous with just one small step. simply purchase a 1 liter container of acetone from home depot, lowes, menards etc. while there, also purchase a bag of epsom salt.
Washing and Recrystalising Meth | Bluelight.org
2024年3月9日 · Drying Acetone You’ll Need: Acetone Epsom salts Filter paper (coffee filters work fine) Oven Most acetone that you’ll buy will be dry enough to use for washing. Though the older it is the greater the chance it has absorbed moisture from the air. Put some of the Epsom salts on a tray in the oven for an hour or so on at least 130 degrees ...
Stimulants Simple acetone wash for (meth)amphetamines and …
2012年4月11日 · hardware store acetone is not going to be anhydrous and probably nowhere near dry enough to do this without wasting some product. you can dry your acetone with stuff like anhydrous epsom salt and other dessicates, although they might deposit in the material you are trying to purify. if your amphetamine still looks or feels wet when there is no ...
anhydrous acetone via anhydrous magnesium sulphate
2007年11月9日 · Then filter off your salt and store the acetone in a pre-dryed container. The magnesium sulfate can be recycled by letting evaporate remaining acetone (NOT in the oven), followed by removal of the water in the oven again. Be aware that MgSO4 is a very poor drying agent for acetone and that purely anhydrous acetone is quite hygroscopic, too.
Thoughts on Anhydrous Acetone wash of MDMA? - Bluelight.org
2009年11月7日 · totally anhydrous acetone is quite hygroscopic so keeping it totally anhydrous for any length of time is challenging, luckily the water content is fairly little so losses are typically low especially if you do your best to dry out the acetone first. as recommended above you can use freezer-chilled acetone to help lower solubility even more.
Why does Finkelstein reaction only work with R-Cl and NaI?
2019年6月4日 · The solid phase which is in equilibrium with the solution below $\pu{-57.5 ^\circ C}$ is a solvated form containing five (or six?) molecules of acetone per molecule of potassium iodide. As stated in above abstract, $\ce{KI}$ molecule is surrounded by 5 to 6 acetone molecule, instead of 3 in $\ce{NaI}$ case. That makes it crowded (steric effect ...
Using Home Depot brand acetone in a wash. | Bluelight.org
2009年9月11日 · These are the specs on the one I use. I don't think any company manufacturs 100% acetone. No one could do that because even when you open the lid and keep it off, moisture would get into the acetone. Even straight from a chemical lab it is 99% anhydrous and cotains 0.5% of water. But in the entire volume of acetone, the water is almost obsolete.
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