Dichlorine trioxide

Dichlorine trioxide[1]
IUPAC name
dichlorine trioxide
Other names
chlorine trioxide
chlorine chlorate
chlorine(I,V) oxide
17496-59-2 N
3D model (Jmol) Interactive image
ChemSpider 11514723 YesY
PubChem 167661
Molar mass 118.903 g/mol
Appearance dark brown solid
Melting point explodes below 0 °C
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

Dichlorine trioxide, Cl2O3, is a chlorine oxide. It is a dark brown solid discovered in 1967 which is explosive even below 0 °C.[2] It is formed by the low-temperature photolysis of ClO2 and is formed along with Cl2O6, Cl2 and O2. Its structure is believed to be OCl-ClO2 with possible isomers such as Cl-O-ClO2.[3] It is the theoretical anhydride of chlorous acid.


  1. Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–51. ISBN 0-8493-0594-2.
  2. N. N. Greenwood and A. Earnshaw, (1997). Chemistry of the Elements. Butterworth-Heinemann. ISBN 978-0750633659.
  3. Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0-12-352651-5
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