home purification

What would be the best and preferably simple solution for purifying MDP2P? If my PMK oil is currently brown/dark yellow, would that cause problems in subsequent reactions, or would the impurities just remain in the final product?

4-Methyl-N-methylcathinone is a powerful synthetic stimulant drug and cheap euphoretic. Importantly, it is most demanded and wide common. It is known that big number of drugs on dark market are sold without purification (with enormous number of side synthesis substances). Using of these drugs...