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1) What is the role of acetonitrile in this reaction? Only solvent? 2) Why need such big amount of acetonitrile in comparsion to other ingridients?

Many thanks for a lot of help in different topics! This guy is a real mine of knowledge.

Additional photos. After taking from microwave oven: And after adding 50mL of water: Yield is problem... still between 30-40%

Yesterday I have tried the method with the microwave and in fact the result is interesting. In baker mixed 20g 5449-12-7 and 20mL of 85% orto-phosphoric acid. I put in microwave oven (700W), and set the lowest power. 5 -7 seconds of heating and 10-15 seconds brake for mixing and cooling the...

Thank you very much for the advice. I will try and reply what is the result. What ratio of phosphoric acid to bmk-glycidic acid sodium salt, temperature and reaction time do you apply? 1:1 and 80-90 degrees and 3h or more?

1)mixed 20g of 5449-12-7, 60mL of water and 40mL concentrated HCl (hcl added slowly in room temperature) - according to procedure ratio 2)Stirred by 3h in 82-84 C degrees. 3)Extracted 3x20mL DCM and washed by concentrated nacl solution (brine) ; dried b MgSO4; dcm evaporated on water bath...

Is it possible to connect both methods (steam distillation and vacuum distillation)? Or the author meant just standard steam distillation technique?

I probably found... I post for others: freebase methamphetamine boiling point: 93°C at 15 mmHg source: https://chemistry.mdma.ch/hiveboard/rhodium/meth.hi-p.html ("the oil was vacuum distilled at a vacuum of 15 mmHg at 93 degC.[NOTE 5]")

(step 1.). I understand it that to just put those ingridients together in flask and start cooking... And my questions are: 1) Doesn't the temperature will grow up dramatically, spontanously after adding HgCl2(or HgNO3), and need to control it to avoid boiling over? 2) Shouldn't I prepare an...

Thank you for your answer. Is there any critical, upper temperature limit? (or maybe proper question will be - what is decomposition temperature of methamphetamine freebase?)

(step 6.) What should be the range of temperature of vacuum destilation (to effectively get rid of impurities, and avoid freebase decomposition)?