Chlorine monoxide

Chlorine monoxide
Chlorine monoxide
Abbreviations ClO(.)
CAS number 12301-79-0
PubChem 166686 YesY
ChemSpider 145843 YesY
MeSH Chlorosyl
Jmol-3D images Image 1
Molecular formula ClO
Molar mass 51.45 g mol−1
Std enthalpy of
101.8 kJ/mol[1]
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Chlorine monoxide is a chemical radical with the formula ClO. It plays an important role in the process of ozone depletion. In the stratosphere, chlorine atoms react with ozone molecules to form chlorine monoxide and oxygen.

Cl· + O3 → ClO· + O2

This reaction causes the depletion of the ozone layer.[1]


  1. ^ a b Egon Wiberg; Nils Wiberg; Arnold Frederick Holleman (2001). Inorganic chemistry. Academic Press. p. 462. ISBN 0-12-352651-5. 

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