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Copper(II) azide

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Title: Copper(II) azide  
Author: World Heritage Encyclopedia
Language: English
Subject: Potassium azide, Caesium hexafluorocuprate(IV), Potassium hexafluorocuprate(III), Lead(II) azide, Copper hydride
Collection: Azides, Copper Compounds, Explosive Chemicals
Publisher: World Heritage Encyclopedia

Copper(II) azide

Copper(II) azide
CAS number
ChemSpider  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
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)
 YesY   YesY/N?)

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 water-soluble sources of Cu2+ and azide ions. (Spectator ions omitted in reaction below).

Cu2+ + 2 N3- → Cu(N3)2

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,  
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