Physical constants and instrumental data (melting point, thin-layer chromatography, gas chromatography, 1H-and 13 C-nuclear magnetic resonance, infrared, 70-eV, electron impact-mass spectroscopy, color, and microcrystalline tests) are reported for the individual stereoisomers, racemates, and corresponding hydrochloride salts of 4-methylaminorex (2-amino-4-methyl-5-phenl-delta 2-oxazoline,4,5-dihydro-4-methyl-5-phenyl-2-oxazolamine, McN-822, "U4Euh," "ICE").