Search results

Teacher, if you don't want to do so much and want to shorten it to one-fifth, can you still succeed? It means the materials are all reduced to one-fifth

Teacher, how can I achieve such a vacuum degree

Teacher, do you know N-phenylethyl ketone

Hello teacher, as I am an Australian, it is difficult to find the materials, but I should be able to find them all

Teacher, does ephedrine need to be neutralized before synthesizing amphetamine and ephedrine? I didn't know before that a lot of ephedrine was wasted, so I wanted to finish the remaining materials first

Not banned by Google

Can the teacher teach me how to use iodophosphate to synthesize hydroiodic acid and how to synthesize methamphetamine? Thank you

Teacher, is it acetophenone?

What kind of solvent is diethyl acetate (phenylacetyl) malonate

Unable to understand the first type of material

Thank you, boss

How does the powder crystallize?

Is there a faster way to crystallize, teacher

After heating and refluxing, add 20ml of water first, then adjust the pH value of the alkali to above 10, then add sodium thiosulfate, and then use toluene for extraction instead of dcm. Is there any mistake in these procedures at present?

Teacher, may I ask if there is no white sediment when I introduce hydrogen chloride? Do you know what the reason is

Just now, a magical thing happened. After drying the toluene solution, hydrogen chloride was introduced, leaving less than 0.5 grams of powder. However, when I filtered the original solution, it turned back into pseudoephedrine

Teacher, how do those powders turn into crystals

Teacher, do you not need to use petroleum ether

Is sodium sulfate drying a mixture of toluene extracted from amphetamine and sodium sulfate for sealing

Excuse me, teacher. After heating and refluxing, first add alkaline solution with a pH value of 10 or above, and then add sodium thiosulfate before extracting with toluene. Can you teach me the next steps? Thank you