Molecular formula: CH3NO2

Physicochemical property: colorless lucid liquid, aqueous solution is acidity, specific gravity(20/20oC)1.139,boiling point:101.2oC.freezing point:-29oC, flashing point'H 95, temperature self-ignite:785'H, refractive index(20/D)1.3817 dissolve in water and ethanol.