Barium azide

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Barium azide
Barium azide.svg
Barium azide, Ba(N3)2.png
Other names
barium dinitride
18810-58-7 YesY
3D model (Jmol) Interactive image
ChemSpider 56472 YesY
ECHA InfoCard 100.038.706
EC Number 242-594-6
PubChem 62728
UN number 1687
Molar mass 221.37 g/mol
Appearance white crystalline solid
Odor odorless
Density 2.936 g/cm[1]
Melting point 126 °C (259 °F; 399 K)
Boiling point 160 °C (320 °F; 433 K) (initial decomposition)[2] >217 °C (deflagrates)
180 °C(initial decomposition),[3] 225 °C explosion
11.5 g/100 mL (0°C)
14.98 g/100mL (15.7°C)
15.36 g/100mL (20°C)
22.73 g/100mL (52.1°C)
24.75 g/100mL (70°C)[4]
Solubility in alcohol 0.017 g/100 mL[5] (16°C)
Solubility in acetone insoluble
Solubility in ether insoluble
Safety data sheet [1]
Highly toxic (T+)
Dangerous for the environment (N)
R-phrases R1, R23, R25, R36, R37, R38
Lethal dose or concentration (LD, LC):
mg/kg (oral, rats/mice)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Barium azide Ba(N3)2 is an inorganic azide, is explosive, but less sensitive to mechanical shock than lead azide.


Can be used to make azides of magnesium (but its hydrolytic tendency frustrated efforts to isolate it), sodium, potassium, lithium, rubidium and zinc with their respective sulfates.[4]

Ba(N3)2 + Li2SO4 → 2 LiN3 + BaSO4

It can also be used in the preparation of extra pure nitrogen on heating:

Ba(N3)2 → Ba + 3 N2

This reaction also liberates metallic barium, used as a getter in vacuum applications.


  1. ^ Fedoroff, Basil T.; Aaronson, Henry A.; Reese, Earl F.; Sheffield, Oliver E.; Clift, George D. (1960). Encyclopedia of Explosives and Related Items (Vol. 1). US Army Research and Development Command TACOM, ARDEC. 
  2. ^ Tiede, E. (1916). "Die Zersetzung der Alkali- und Erdalkali-azide im Hochvakuum zur Reindarstellung von Stickstoff". Ber. Dtsch. Chem. Ges. 49: 1742–1745. doi:10.1002/cber.19160490234. 
  3. ^ Audrieth, L. F. (1934). "Hydrazoic Acid and Its Inorganic Derivatives". Chem. Rev. 15: 169–224. doi:10.1021/cr60051a002. 
  4. ^ a b H. D. Fair and R. F. Walker (1977). Energetic Materials, Vol. 1. Physics and Chemistry of the Inorganic Azides. New York and London: Plenum Press. doi:10.1002/prac.19770811124. 
  5. ^ Curtius, T.; Rissom, J. (1898). "Neue Untersuchungen über den Stickstoffwasserstoff N3H". J. Prakt. Chem. 58: 261–309. doi:10.1002/prac.18980580113.