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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
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 25 July 2017
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The method aims to investigate the temperature behaviour of the reaction mass of cerium dioxide, praseodymium oxide and zirconium dioxide. A thermogravimetric (TG) analyser together with a Differential Thermal Analysis (DTA) was used for this.
- GLP compliance:
- not specified
- Type of method:
- thermal analysis
- Key result
- Melting / freezing pt.:
- > 800 °C
- Atm. press.:
- 101.325 kPa
- Decomposition:
- no
- Remarks:
- only loss of physisorbed water was observed
- Sublimation:
- no
- Remarks on result:
- other: a yellow to brown powder was obtained after the experiment
- Conclusions:
- TG/DTA scan proves that the reaction mass of cerium dioxide, praseodymium oxide and zirconium dioxide does not melt when heated from room temperature up to 800°C, the final product being a yellow to brown powder. The mass loss (4.12% in total) can be attributed to loss of physisorbed water from the powder surface.
Reference
Results:
1. A total weight loss of 4.12% is recorded up to 750°C with no thermal event being assigned to a melting process.
2. The main loss between room temperature and 415°C accounts for 3.19 wt% and corresponds to an exothermic event with a maximum at 65°C.
3. The second weight loss occurring between 415 and 760°C is measured to be 0.93 wt% and is accompanied by a shallow endotherm.
The mass loss can be attributed to loss of physisorbed water from the powder surface.
Description of key information
Based on the TG/DTA (Dvininov, 2017; Klimisch 2) it can be concluded that the reaction mass of cerium dioxide, praseodymium oxide and zirconium dioxide does not melt when heated from room temperature up to 800°C, the final product being a yellow to brown powder. The mass loss (4.12% in total) can be attributed to loss of physisorbed water from the powder surface.
Key value for chemical safety assessment
Additional information
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.