Acetylleucine is shiny white flaky crystal or white crystalline powder, crystallized in the water and then was orthogonal chip-like. Odorless or slight odor  of aniline and acetic acid. Acetylleucine the melting point is 114.3 ℃, boiling point is 304 ℃. Acetylleucine up to the ignition point 546 ℃, relative density is 1.2190 (15 / 4 ℃). Acetylleucine stable  in the air. Acetylleucine slightly soluble in  cold water, soluble in water, methanol, ethanol, ethyl ether, chloroform, acetone, glycerol, and benzene, insoluble in petroleum ether. Acetylleucine flammable, neutral  or very weakly basic. Case of acid or alkaline solution easily decomposed into aniline and acetic acid.