para-chlorophenylpiperazine para-chlorophenylpiperazine para-chlorophenylpiperazine (pcpp) is a psychoactive drug of the phenylpiperazine class. it is relatively obscure, with limited human use, and produces slightly psychedelic effects. it has been encountered in illicit capsules as a recreational drug similarly to other piperazines like mcpp. scientific research has demonstrated pcpp to have serotonergic effects, likely acting as a non-selective serotonin receptor agonist and/or releasing agent. para-chlorophenylpiperazineclinical dataroutes ofadministrationoralatc codenoneidentifiers iupac name 1-(4-chlorophenyl)piperazine cas number38212-33-8 y 38869-46-4 (dihydrochloride)pubchem cid97478chemspider87985uniifmd47je5c3comptox dashboard (epa)dtxsid90191592 echa infocard100.155.613 chemical and physical dataformulac10h13cln2molar mass196.68 g·mol−13d model (jsmol)interactive image smiles clc1ccc(cc1)n2ccncc2 a known use has been in the synthesis of l-745,870.