Nitric oxide - NO

Nitric oxide (NO) is a colourless and poisonous gas that exists in car exhausts and small amounts in the atmosphere.

The main applications of nitric oxide is to calibrate gas mixtures for petrochemical industry, environmental emissions monitoring and trace impurity in analysers.

The major hazards of NO are inhalation and reactivity.


  • Molecular weight:

    30.006 g/mol

  • Gaseous phase:

    Gas density (1.013 bar at boiling point): 3.027 kg/m3
    Gas density (1.013 bar and 15 °C (59 °F)): 1.3402 kg/m3

  • Solid phase:

    Melting point: -161 °C

  • Liquid phase:

    Boiling point (1.013 bar): -151.77 bar
    Liquid density (1.013 bar at boiling point): 1280.84 kg/m3

  • Critical point:

    Critical temperature: -93 °C
    Critical pressure: 64.8 bar
    Critical density: 517.345 kg/m3