Benzylpiperazines (BZP) are stimulant drugs which inhibit monoamine uptake. BZP and substituted derivatives, such as 1-(3,4-methylenedioxybenzyl)piperazine, have been identified as designer drugs or drugs of abuse. ?4-fluoro BZP is a substituted BZP with a potential for abuse. The physiological and toxicological properties of this compound have not been evaluated. This product is intended for forensic and research applications. ?4-fluoro BZP is also used as a precursor in the synthesis of certain bioactive compounds.