Registration Dossier
Registration Dossier
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The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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EC number: 909-709-8 | CAS number: -
Auto flammability
Administrative data
Link to relevant study record(s)
Description of key information
Reaction mass of cerium dioxide and zirconium dioxide should not show any potential for self-ignition.
Data on constituents:
Cerium dioxide: no self-ignition up to 500°C (experimental result)
Zirconium dioxide: not sensitive to self-ignition (waiver)
Key value for chemical safety assessment
Additional information
No self-ignition data is available on reaction mass of cerium dioxide and zirconium dioxide. The potential for self-ignition is thus assessed via information available on the constituents. For cerium dioxide, one GLP-compliant experimental study, scored as Klimisch 2, is available (Cerutti M., 2005) and shows no self-ignition up to 400 °C. This data was selected as a supporting study. For zirconium dioxide this is based on a waiver statement: "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 and will not be sensitive to self-ignition".
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.
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