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ammonium azide

Basic information Chemical properties Physical properties Preparation Safety Related Supplier
ammonium azide Basic information
ammonium azide Chemical Properties
  • Melting point:160℃ [CIC73]
  • Boiling point:explodes at 134℃ [CIC73]
  • Density 1.346
  • form orthorhombic crystals
  • color Colorless plates
  • Water Solubility g NH4N3/100g H2O: 16.0 (0°C), 25.3 (20°C), 37.1 (40°C) [LAN05]
Safety Information
  • RIDADR 0473
  • HazardClass 1.1A
ammonium azide Usage And Synthesis
  • Chemical propertiesAmmonium azide is an explosive chemical compound with the formula NH4N3.It is one of the few oxygen-free explosive materials that can be handled (relatively) safely.
    Ammonium azide will detonate to release nitrogen and hydrogen gases. NH4N3 → 2 N2 + 2 H2
    Traces of ammonia are also produced.
  • Physical propertiesAmmonium azide is a non-hygroscopic colorless odorless crystalline solid. It melts at 160 °C and decomposes at 400 °C. Ammonium azide is soluble in water. It also is soluble in ammonia. It is also easily soluble in ethanol, glycerol, methanol, pyridine, sparingly soluble in allyl alcohol, butanol and isobutanol and insoluble in acetone, aniline, benzaldehyde, benzene, carbon disulfide, chlorobenzene, chloroform, diethyl ether, ethyl acetate, isoamyl alcohol, methyl acetate, methyl ethyl ketone, nitrobenzene, tetrachloroethane, toluene and xylene.
  • PreparationAmmonium azide can be made by bubbling anhydrous ammonia in a ether solution of HN3. Since ammonium azide is almost insoluble in ether, it will precipitate.The precipitate is filtered and vacuum dried. Water traces are removed using phosphorus pentoxide in a desiccator.
    Heating a mixture of sodium azide with ammonium nitrate in a stream of dry air in a tube at 190 °C for 30 min will yield ammonium azide. The yield of the process is 93%. Ammonium sulfate can also be used instead of nitrate.
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  • Chemical Propertiesorthorhombic, a=0.893 nm, b=0.864 nm, c=0.380 nm [CIC73]
  • Safety ProfilePoison by inhalation and ingestion. See also AZIDES. Moderately flammable. Unstable. Explosion hazard upon rapid heating.
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