Ammonia - NH3

Ammonia (NH3), is a colourless gas with a distinct smell that is hazardous in high concentrations.

Ammonia is irritating to the mucous membrane and can in small amounts cause problems to the respiratory passage.


  • Molecular weight:

    17.03 g/mol

  • Gaseous phase:

    Gas density (1.013 bar at boiling point): 0.889 kg/m3
    Gas density (1.013 bar and 15 °C (59 °F)): 0.7289

  • Solid phase:

    Melting point: -77.74 °C

  • Liquid phase:

    Boiling point: (1.013 bar): -33.33 °C
    Liquid density (1.013 bar at boiling point): 681.97 kg/m3

  • Critical point:

    Critical temperature: 132.25 °C
    Critical pressure: 113.3 bar
    Critical density: 225 kg/m3