good afternoon everyone, I have 6kg of ephedrine, I have already started doing the tests through the hypophosphorous route, the acid that I have is at 80%, okay? or at what concentration should it be?
After doing the whole process, at the end the oil was separated from the aqueous part, the yellow methamphetamine oil and a brown-colored layer was also formed, I separated with toluene and the brown color disappeared, I decanted and then I started the crystallization with HCL in gas, I lowered it to a ph of 5 and nothing happened, I kept lowering the ph until it reached zero and a very dense layer was formed at the bottom, I placed it on a rotaevaporator for an hour to remove it the toluene and after removing the ball from the rotaevaporator it became like a slush, I waited for it to dry for 24 hours and it was still wet, I don't know what I was wrong but I could not crystallize the goal, it would be of great help if you could explain to me where was I wrong, thank you very much