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EC number: 233-162-8
CAS number: 10049-04-4
Not combustible but enhances combustion of other
Reacts violently with organics, causing fire and
The ICSC provides information relating to explosive potential of the
substance Chlorine dioxide if contact with organic materials.
Explodes when heated or by reaction with organics. 
Reacts violently with organic materials. 
Incompatible with other combustible materials, organic matters, and
The gas and liquid are violently decomposed by organic materials. The
gas will decompose at temperatures below the boiling point of water. 
The HSDB database provides information, from several sources, relating
to oxising properties of the substance Chlorine dioxide, in particular
explosive potential if contact with organic materials.
Solution of chlorine dioxine generated in-situ at less than 2% in water (as registered): not considered to be oxidising, but potential hazard if off-gassing.
The properties of gaseous chlorine dioxide are discussed because,
although the substance as registered is in-situ generated aqueous
solution, under certain conditions off-gassing may occur.
Two literature data warn about risk of violent reaction if gas in
contact with organics. However, high content of water is anticipated to
inhibit any combustion with end-use solution.
Partial pressure of ClO2 over the solution, and therefore
potential hazard, is a function of concentration and temperature (please
refer to point 4.6).
For chlorine dioxide gas, a harmonised classification is already
included in Regulation (EC) No.1272/2008, Annex VI Part 3, with Ox. Gas
1, H270: May cause or intensify fire; oxidiser.
For chlorine dioxide in aqueous solution, no physical hazard is
established in the harmonised entry.
It is unnecessary to perform a further test to confirm this
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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