Hello,
i have read that a lot off people have the problem that there mmc turns blue after adification. Why is this?
Is there any way to clean such powder of different colours (blue, red) afterwards? Rinsing with cold or boiling in hot acetone will not help.
Only acetone help. And use pure hcl 35%-38% no 30%
I already have mephedrone salt, but it is blue-red and even huge amounts of acetone refuse to flush the colour to pure white.
I already have mephedrone salt, but it is blue-red and even huge amounts of acetone refuse to flush the colour to pure white.
Made crystal and later wash IT with acetone
Is there any way to clean such powder of different colours (blue, red) afterwards? Rinsing with cold or boiling in hot acetone will not help.
Yes i also think acid hcl is the problem, i have order new hcl and try again!
What the problem was is no longer important. I have a lot of coloured 4MMC powder and I can't crystallise it because of this. I am therefore looking for a way to get rid of the impurities.
Is dissolving such coloured 4MMC hydrochloride in hot DCM, successively add an equal volume of water. Treat this with hydrochloric acid (here to what PH is best to acidify so that all the 4MMC goes into the aqueous phase and the impurities stay in the DCM. PH 4 or lower?)
Subsequently separate the layers and evaporate the aqueous layer, a white powder of 4MMC should remain.
The impurity is a condensation product of aminoketone and 4-methylpropiophenone, the problem is that the impurity travels from layer to layer along with the aminoketone.
I can't do anything about it anymore?
Can be distilled in very low vacuum. less than 10 microns.
The second option is to select an acid and an organic solvent so that the impurity salt dissolves well in solvents, but the mephedrone salt does not.
Currently, the last thing I can think of is to dissolve 1g of dirty 4MMC in 1ml of hot water. Let's assume that we then have 500ml of such a solution. So we then add 250ml of DCM, stir vigorously after which the aqueous layer once separated goes to crystallise.
I guess the last hope in this
Methylamine excess can give such color. You have to be sure that you have got rid of methylamine after reaction before acidification.
How much IPA per 1g of flour do you suggest?
Methylamine excess can give such color. You have to be sure that you have got rid of methylamine after reaction before acidification.
The admixture of methylamine did not give color to the solution and powder when the acid was added. I checked the mixture of dichloromethane, free base + methylamine impurity, the mixture after amination, the aqueous methylamine layer was discarded, the dichloromethane layer, on purpose, was not washed with water. The addition of hydrochloric acid to dichloromethane did not give color, the powder fell out immediately and was almost white (slight yellowish tint). If necessary, I can provide more detailed information on experience with photos.
Thanks for your research! It is valuable information. Could you please add some pictures here?
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