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HBr - just mix some KBr or NaBr with dilute sulfuric acid (about 30-40%) and distill everything between 122-127C. You will obtain 40% HBr (about 1,38 g/ml density). Use excess of sulfuric acid (about 1.5-2.0 times more moles). Use only dilute H2SO4 because if you don't you will make few mls of...

it's the opposite, you should evaporate the solvent, not add more adding more solvent will make more space for your product to be dissolved in, evaporating the solvent makes "less space"

It is possible to recover Copper (II) Oxide after iodination, wash it and later use again, right? It's a catalyst?

How long should I microwave it? 3 minutes just like you wrote? O.o

So first I should make my ptsa anhydrous if I have monohydrate, right? Melting and boiling it in 115C for 2h will do? Or I should strictrly follow preparation and keep it molten in 115C for 14+h in inert gas like nitrogen (which I want to avoid)?

I was looking for some basic preparation of a chemical I don't remeber now and it was just youtube. And then yt recommended me a video of bb.expert channel and poof - here I am.

Hello, so I want to make some propionyl chloride and react it with toluene therefore I"m looking for a way to obtain a propionic acid. It is somewhat hard or expensive where I live but salts of it are like almost free. I can get sodium propionate and calcium propionate. Which one is best for...

adb-butinaca is far too strong and too easy to overdose, which is actually a problem with 99% of synthetic cannabinoids THJ-018 APICA APINACA UR-144 (?) AB-001 My favorite was BB-22 because it had similar duration of action to THC however it disappeared long time ago. Also was easier to...