Chlorine azide

Chlorine azide
Chlorine azide
PubChem 61708
Jmol-3D images Image 1
Molecular formula ClN3
Molar mass 77.4731
Appearance yellow orange liquid
Melting point

freezes at -100C

Boiling point

approx -15C

Solubility soluble in butane, pentane, benzene, methanol, ethanol, diethyl ether, acetone, chloroform, carbon tetrachloride, and carbon disulfide; slightly soluble in water
Explosive data
Shock sensitivity High
Friction sensitivity High
Main hazards Harmful, Explosive
Related compounds
Related compounds Hydrazoic acid
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Chlorine azide (ClN3) is an inorganic compound. It was discovered by Friedrich Raschig in 1908.[1] More so than other azides, ClN3 is highly explosive. In undiluted condition, it usually detonates violently whatever the temperature, without apparent provocation.[2]


Preparation and handling

Chlorine azide is prepared by passing chlorine gas over silver azide or by an addition of acetic acid to a solution of sodium hypochlorite and sodium azide.[3]

When treated with ammonia it is conceivable that one or more of the three possible azinamines, NH2N3, NH(N3)2, and N(N3)3 may be formed.

Explosive characteristics

Chlorine azide is highly sensitive. It will explode without provocation and is too sensitive to be used commercially. Explosive reaction with 1,3-butadiene, ethane, ethylene, methane, propane, phosphorus, silver azide, sodium. Reacts with water or steam to produce toxic and corrosive fumes of hydrochloric acid.[4]

Regulatory information

US Department of Transportation forbids shipment.


  1. ^ Frierson, Joe; Browne, A. W.; Chlorine Azide. II. Interaction of Chlorine Azide and Silver Azide. Azino Silver Chloride, N3AgCl JACS, 1943, 65 (9), pp1698–1700 DOI: 10.1021/ja01249a013 Publication Date: September 1943
  2. ^ Frierson, W. Joe; Kronrad, J.; Browne, A. W.; Chlorine Azide, ClN3, JACS., 1943, 65 (9), pp 1696–1698 DOI: 10.1021/ja01249a012 Publication Date: September 1943
  3. ^ Raschig, F. (1908). "Über Chlorazid N3 Cl". Berichte der deutschen chemischen Gesellschaft 41 (3): 4194–4195. doi:10.1002/cber.190804103130. 
  4. ^ Pubchem

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