On October 1, 2011 the Drug Enforcement Association issued an emergency ban on legal synthetic drugs known as "bath salts.” The DEA describes the so-called "bath salts", which have nothing in common with products long-used in bathing, as a sort of imitation cocaine or LSD – a substance that while legal, has not been approved by the FDA for human consumption and has been linked to violent, sometimes deadly outbursts by users. It is illegal to possess and distribute these drugs.
Effective January 1, 2013, Massachusetts has added these same synthetic drugs into the Class C schedule of Chapter 94C, § 31.
Resources for Additional Information About Bath Salts:
DEA Announces Ban on Bath Salts 
MA Legislation Banning Bath Salts