4-chloromethcathinone 4-chloromethcathinone 4-chloromethcathinone (also known as 4-cmc and clephedrone) is a stimulant drug of the cathinone class that has been sold online as a designer drug. 4-chloromethcathinonelegal statuslegal status de: anlage i (authorized scientific use only) uk: class b un: psychotropic schedule ii illegal in china and sweden identifiers iupac name 1-(4-chlorophenyl)-2-(methylamino)-1-propanone cas number1225843-86-6pubchem cid82100418chemspider25630416uniiptayyyzmmtcomptox dashboard (epa)dtxsid201014163echa infocard100.257.446 chemical and physical dataformulac10h12clnomolar mass197.66 g·mol−13d model (jsmol)interactive imagemelting point198 °c (388 °f) smiles clc1=cc=c(c(c(c)nc)=o)c=c1 inchi inchi=1s/c10h12clno/c1-7(12-2)10(13)8-3-5-9(11)6-4-8/h3-7,12h,1-2h3key:uejbeyoxrngpei-uhfffaoysa-n the exact pharmacology of 4-cmc is unknown, though it is probably a dopamine and serotonin releasing agent. its chemical structure closely resembles para-chloromethamphetamine and studies involving mice indicate that it is neurotoxic. legality clephedrone is an anlage i controlled drug in germany. sweden's public health agency suggested classifying 4-chloromethcathinone (klefedron) as illegal narcotic on june 1, 2015. as of october 2015 4-cmc is a controlled substance in china. 4-cmc is considered a schedule 1 substance in virginia. in december 2019, the unodc announced scheduling recommendations placing 4-cmc into schedule ii.