Colorless transparent liquid. Have suffocated sexual stimulation smell. Nitric acid content is 68% or so, volatile. In the air in the produce white mist, nitric acid steam and water vapor is combined, in the form of nitric acid small droplet. Dew light produce four oxidation 2 n and become brown. Have strong acid. Can make wool fabric and animal tissue into tender yellow. Can with ethanol, turpentine, carbon and other organic matter violent reaction. Can and water immiscible. With water forms of can boiling mixture. The relative density (d204) 1.41. Boiling point 120.5 ℃ (68%). Have strong oxidizing, and in addition to the JinBo metal reaction nitrogen dioxide released or nitric oxide. Have strong corrosive.