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Diss Factsheets
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EC number: 909-715-0 | 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
Auto flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative self-ignition temperature (solids)
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 17 July 2012 - 21 January 2013
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.16 (Relative Self-Ignition Temperature for Solids)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks on result:
- other: The test material has been determined not to have a self-ignition temperature below 400 °C.
- Conclusions:
- The test material has been determined not to have a self-ignition temperature below 400 °C.
- Executive summary:
The relative self-ignition temperature of the test material was investigated in accordance with the standardised guideline EU Method A.16.
A wire mesh cube was completely filled with the test material and placed in the centre of an oven at room temperature. A thermocouple was placed in the centre of the sample and another in the oven. The oven temperature was increased from ambient to 400 °C at a rate of 0.5 °C/min.
Whilst heating, the test material showed no significant temperature rise above the oven temperature.
The test material has been determined not to have a self-ignition temperature below 400 °C.
- Endpoint:
- relative self-ignition temperature (solids)
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 10 June 2005 - 13 October 2005
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.16 (Relative Self-Ignition Temperature for Solids)
- Version / remarks:
- Cited as Directive 92/69/EEC, A.16
- Deviations:
- yes
- Remarks:
- The maximum oven temperature was 300°C instead of 400°C as required by the guideline. A Grewer test was done in addition, in order to confirm the results up to 500°C.
- GLP compliance:
- yes
- Relative self-ignition temperature:
- > 400 °C
- Conclusions:
- Cerium dioxide has no self-ignition temperature up to at least 400°C.
- Executive summary:
The determination of the relative self-ignition temperature of cerium dioxide was performed according to EU Method A16 only up to 300°C with a plateau. No self-ignition was observed up to 300°C. A Grewer test, performed up to 500°C, was done as a complement to the previous test.
No exothermic reaction was observed up to 500°C. The test item has no self-ignition temperature up to at least 400°C.- Endpoint:
- relative self-ignition temperature (solids)
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- weight of evidence
- Justification for type of information:
- Since no reliable studies on this endpoint are available for the reaction mass of cerium dioxide, praseodymium(III,IV) oxide and zirconium dioxide, read across was performed using studies performed with praseodymium(III,IV) oxide and cerium dioxide. No such study is available for zirconium dioxide, however, as explained below, zirconium dioxide can be concluded to be not autoflammable based on non-testing information. The read across justification document is attached to IUCLID Section 13.
- Reason / purpose for cross-reference:
- read-across source
- Reason / purpose for cross-reference:
- read-across source
- Remarks on result:
- other: The reaction mass of cerium dioxide, praseodymium(III,IV) oxide and zirconium dioxide is not expected to exhibit self-ignition properties.
- Remarks:
- This conclusion is based on testing information for cerium dioxide and praseodymium(III,IV) oxide and non-testing information for zirconium dioxide.
- Conclusions:
- Cerium dioxide and praseodymium(III,IV) oxide have been demonstrated not to be autoflammable up to a temperature of 400°C. No testing information is available for zirconium dioxide, however, inorganic oxides in which the element bound to oxygen 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 either. Based on this information on its main constituents, the reaction mass of cerium dioxide, praseodymium(III,IV) oxide and zirconium dioxide can be considered not to be sensitive to self-ignition either.
Referenceopen allclose all
The test material was a brown powder. Whilst heating, the sample showed no significant temperature rise above the oven temperature. On completion of the test, the cube remained full of a brown powder.
Pressure not indicated.
Description of key information
No key information is available on the auto-flammability and/or self-ignition temperature of the reaction mass of cerium dioxide, praseodymium(III,IV) oxide and zirconium dioxide. Cerium dioxide and praseodymium(III,IV) oxide have been demonstrated not to be autoflammable up to a temperature of 400°C (White, 2013, Klimisch 1; Cerutti, 2005, Klimisch 1). No testing information is available for zirconium dioxide, however, inorganic oxides in which the element bound to oxygen 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 either. Based on this information on its main constituents, the reaction mass of cerium dioxide, praseodymium(III,IV) oxide and zirconium dioxide can be considered not to be sensitive to self-ignition either.
Key value for chemical safety assessment
Additional information
1. Information on cerium dioxide
Based on a guideline study (Cerutti, 2005; Klimisch 1) it can be concluded that cerium dioxide has no auto-ignition temperature up to at least 400°C.
2. Information on praseodymium(III,IV) oxide
Based on a guideline study (White, 2013; Klimisch 1) it can be concluded that praseodymium(III,IV) oxide has no auto-ignition temperature up to at least 400°C.
3. Information on zirconium dioxide
Given that zirconium dioxide is an inorganic oxide in which zirconium is in its highest possible oxidation state (4+), it can be concluded to be incapable of further reaction with oxygen and can thus be designated as non-flammable and will not be sensitive to self-ignition.
4. Conclusion on the reaction mass of cerium dioxide, praseodymium(III,IV) oxide and zirconium dioxide
Based on the results for the three substances forming this reaction mass it can be safely concluded that the reaction mass does not exhibit auto-flammability or self-heating properties.
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