Registration Dossier
Registration Dossier
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EC number: 215-227-2 | CAS number: 1314-23-4
Flammability
Administrative data
Link to relevant study record(s)
Description of key information
Inorganic oxides in which the inorganic element is in its highest possible oxidation state are incapable of further reaction with oxygen and can thus be designated as non-flammable. The oxidation state of zirconium in zirconium dioxide is in its highest possible state (4+) and thus zirconium dioxide can be considered as non-flammable.
Key value for chemical safety assessment
- Flammability:
- non flammable
Additional information
Justification for classification or non-classification
Pyrophoricity.
In the daily use and handling of zirconium dioxide during which continuous exposure to air can occur, no spontaneous ignition is observed. The absence of structural alerts furthermore confirms that it is highly unlikely that zirconium dioxide has pyrophoric properties.
Flammability in contact with water.
Under conditions where zirconium dioxide is in contact with water no ignition and/or liberation of flammable gases is observed. The absence of structural alerts furthermore confirms that it is highly unlikely that zirconium dioxide is flammable in contact with water.
Flammability.
Inorganic oxides in which the inorganic element is in its highest possible oxidation state are incapable of further reaction with oxygen and can thus be designated as non-flammable. The oxidation state of zirconium in zirconium dioxide is in its highest possible state (4 +) and thus zirconium dioxide can be considered as non-flammable.
Following the above assessment it is concluded that zirconium dioxide is non-flammable and should thus not be classified for this endpoint.
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