4-methylphenethylamine 4-methylphenethylamine 4-methylphenethylamine (4mpea), also known as para-methylphenethylamine, is an organic compound with the chemical formula of c9h13n. 4mpea is a human trace amine associated receptor 1 (taar1) agonist, a property which it shares with its monomethylated phenethylamine isomers, such as amphetamine (α-methylphenethylamine), β-methylphenethylamine, and n-methylphenethylamine (a trace amine). 4mpea also appears to inhibit the human cytochrome p450 enzymes cyp1a2 and cyp2a6, based upon the published literature. 4-methylphenethylamine names preferred iupac name 2-(4-methylphenyl)ethan-1-amine other names 2-(4-methylphenyl)ethanamine2-(p-tolyl)ethan-1-amine identifiers cas number 3261-62-9 3d model (jsmol) interactive image chemspider 69207 echa infocard 100.019.878 pubchem cid 76751 unii 2apy7deb6e y comptox dashboard (epa) dtxsid70186305 smiles cc1=cc=c(c=c1)ccn properties chemical formula c9h13n molar mass 135.210 g·mol−1 appearance clear colorless to light yellow liquid density 0.93 g/ml boiling point 214 °c (417 °f; 487 k) hazards occupational safety and health (ohs/osh): main hazards corrosive flash point 91 °c (196 °f) except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references