Nitric acid is an important strong acid. 69% or above of nitric acid is concentrated nitric acid, 98% or above is fume nitric acid.

Product name: Nitric acid

Structural formula or Molecular formula: HNO

Relative Molecular weight: 63.01

CAS No.: 7697-37-2

Density: 1.51 g/cm

Melting point: -42°C

Boiling point: 86°C(pure)(Boiling point of 68%aq is 120.5°C)

Specification: 40%, 45%, 65%, 68%, 98%

Properties: pure nitric acid is colorless fume liquid, most of are red brown with slight yellow. Fume nitric acid red brown irritative liquid.

Note:

3NO₂+H₂O=====2HNO₃+NO

4NO₂+2H₂O+O₂=====4HNO₃