PMA chemical structure Para-methoxy-amphetamine (C10H15NO) is more commonly known as PMA or 4-MA. it is related to the other amphetamines including MDMA chemicly, PMA is one of the more dangerous of these substances. While a small quantity is produced legally for research purposes, most is produced in illicit laboratories. It appears in Ecstasy tablets somewhere in the chain of black market.
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