There is an internet drug nerb snob attitude which states "mdma has to be a white powder attitude". What is one of the major mdxx precursors? Safrole oil. With a million different types of cathiones and different "molly" capsules floating around not doing a final wash on mdxx synthes is becoming a major occurence. It leaves qualitative indicators such as smell taste and color that most mdxx versed people can use to identify. I know without a test kit you don't know trust me I've tested 50+ tests this summer alone. However when I see something with that Brown Color that saffrole leaves, I've never tested it and had it not come back straight black. I see pretty much every batch of methylone that that major suppliers from Asia ship Out and not even the methylone moon rocks look anywhere near the coloring left from a non washed mdxx synth. My $0.02