2-Methylphenylpiperazine (also known as 1-(2-Methylphenyl)piperazine, 1-(o-Tolyl)piperazine, Piperazine, 1-(2-methylphenyl)-, 4-(2-Methylphenyl)piperazine, ortho-Methylphenylpiperazine, 2-Mepp, O-methylphenylpiperazine, 254-481-9, 1-o-tolylpiperazine or 1-(2-Methylphenyl)-piperazine) is a stimulant substance of the phenylpiperazine class.
U.S. Food and Drug Administration; National Center for Advancing Translational Sciences. 2-Methylphenylpiperazine. UNII: 6P26KQQ7V5. Global Substance Registration System. Accessed July 20, 2025. https://gsrs.ncats.nih.gov/ginas/app/beta/substances/6P26KQQ7V5