White crystals. The melting point is 150-151 °C (decomposition). Odorless or slightly acetone odor. Soluble in dilute nitric acid, dilute sodium hydroxide, acetone, sodium bicarbonate and phosphoric acid, slightly soluble in ethanol, slightly soluble in ether, insoluble in water and benzene. At 40 °C, the aqueous solution of the product is unstable, and carbon dioxide is liberated to generate aminophenol. Turns brown when exposed to air.