Nitrogen dioxide - NO2

Nitrogen dioxide (NO2) is a poisonous gas with a strong pungent smell and strong oxidizing properties. Nitrogen dioxide is one of the worst air pollutants.

Nitrogen dioxide is used in the chemical industry, laboratories and analysis industry.

The major hazards of NO2 are inhalation and reactivity.


  • Molecular weight:

    46.006 g/mol

  • Gaseous phase:

    Gas density (1.013 bar at boiling point): 3.4 kg/m3

  • Solid phase:

    Melting point: -11.2 °C

  • Liquid phase:

    Boiling point: 21 °C
    Liquid density (1.013 bar at boiling point): 1447.58 kg/m3

  • Critical point:

    Critical temperature: 158 °C
    Critical pressure: 101.32 bar
    Critical density: 557.717 kg/m3