Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
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.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 909-709-8 | CAS number: -
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- substances / mixtures which in contact with water emit flammable gases
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because the experience in production or handling shows that the substance does not react with water, e.g. the substance is manufactured with water or washed with water
- other:
- Endpoint:
- flammable solids
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
- Endpoint:
- flammable solids
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 10 June 2005 - 13 October 2005
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.10 (Flammability (Solids))
- Version / remarks:
- Cited as Directive 92/69/EEC, A.10
- Deviations:
- yes
- Remarks:
- Ignition source: use of a platinum wire heated by electrical power instead of a direct flame. This modification has no effect on the conclusion.
- GLP compliance:
- yes
- Test procedure:
- burning rate test: preliminary screening test
- Remarks on result:
- substance does not ignite and propagate combustion either by burning with flame or smouldering along 200 mm of the powder train within the 2 minutes test period
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- Cerium dioxide is not highly flammable under the conditions of the test.
- Executive summary:
The determination of the flammability of cerium dioxide was performed using a powder train about 250 mm long, according to EU Method A10.
The test item did not burn. No further testing was required. Cerium dioxide is not highly flammable under the conditions of the test.
- Endpoint:
- pyrophoric solids
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days) and hence, the classification procedure does not need to be applied
- other:
- Endpoint:
- self-heating substances / mixtures
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
- Endpoint:
- flammable solids
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- supporting study
- Justification for type of information:
- Read across from flammability data for the constituent cerium dioxide which are used as supporting information for the reaction mass of cerium dioxide and zirconium dioxide. The read across justification document is attached to IUCLID Section 13.
- Reason / purpose for cross-reference:
- read-across source
- Test procedure:
- burning rate test: preliminary screening test
- Remarks on result:
- substance does not ignite and propagate combustion either by burning with flame or smouldering along 200 mm of the powder train within the 2 minutes test period
- Remarks:
- The negative result of the flammability test on CeO2 supports the conclusion that the reaction mass of CeO2 and ZrO2 is not expected to be a flammable solid.
Referenceopen allclose all
The test item did not burn. No further testing was required.
Description of key information
Based on the fact that both cerium and zirconium are present in their highest oxidation state (i.e. 4+), the absence of structural alerts, as well as experience in day-to-day handling and use, the reaction mass of cerium dioxide and zirconium dioxide can be concluded not to be flammable, self-heating, pyrophoric, or capable of releasing flammable gases in contact with water. Available data on the constituent cerium dioxide are used as supporting information in a read across analogue approach.
Key value for chemical safety assessment
- Flammability:
- not classified
Additional information
For cerium dioxide, one GLP-compliant experimental study (Cerutti, 2005), scored as Klimisch 1, is available and shows no flammable properties for this substance.
Justification for classification or non-classification
Pyrophoricity:
In the daily handling and use of the reaction mass of cerium dioxide and 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 the reaction mass of cerium dioxide and zirconium dioxide has pyrophoric properties. In addition, both main constituents of the reaction mass of cerium dioxide and zirconium dioxide are considered to have no pyrophoric properties.
Flammability in contact with water:
Under conditions where the reaction mass of cerium dioxide and 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 the reaction mass of cerium dioxide and zirconium dioxide is flammable in contact with water. In addition, both main constituents of the reaction mass of cerium dioxide and zirconium dioxide are considered not to be flammable in contact with water.
Flammability:
The oxidation state of zirconium and cerium in the reaction mass of cerium dioxide and zirconium dioxide is in its highest possible state (4+). Therefore, the substance can be considered as non-flammable.
Self-heating:
The oxidation state of zirconium and cerium in the reaction mass of cerium dioxide and zirconium dioxide is in its highest possible state (4+). Therefore, the substance can be considered as non-flammable and not sensitive to self-heating.
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.