Copper(II) azide

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Copper(II) azide
Copper (II) azide.JPG
CAS number 14215-30-6
ChemSpider 21106430 YesY
Jmol-3D images Image 1
Image 2
Molecular formula Cu(N3)2
Molar mass 147.586 g/mol
Appearance brown orthorhombic crystals
Density 2.6 g/cm 3
Melting point (explodes)
EU classification Toxic (T)
Explosive (E)
NFPA 704
Flammability code 4: Will rapidly or completely vaporize at normal atmospheric pressure and temperature, or is readily dispersed in air and will burn readily. Flash point below 23 °C (73 °F). E.g., propane Health code 3: Short exposure could cause serious temporary or residual injury. E.g., chlorine gas Reactivity code 4: Readily capable of detonation or explosive decomposition at normal temperatures and pressures. E.g., nitroglycerin Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point  ?
Related compounds
Other cations Lead(II) azide
Silver azide
Sodium azide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Copper(II) azide is a medium density explosive with the molecular formula Cu(N3)2.


Copper azide is very explosive and is too sensitive for any practical use unless handled in solution.


Copper azide can be prepared by a metathesis reaction between copper(II) nitrate (Cu(NO3)2) and sodium azide.

Cu(NO3)2 + 2 NaN3 → Cu(N3)2 + 2 NaNO3

It can be destroyed by nitric acid to form non-explosive products:

Cu(N3)2 + 2HNO3 → 3N2 + 2NO2 + Cu(OH)2


  1. ^ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–55, ISBN 0-8493-0594-2