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Diss Factsheets
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EC number: 215-234-0 | CAS number: 1314-37-0
- 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
![](https://echa.europa.eu./o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_physical-and-chemical-properties.png)
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:
- weight of evidence
- Study period:
- 19 July 2017 - 22 August 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- > 600 °C
- Atm. press.:
- 101.325 kPa
- Decomposition:
- no
- Sublimation:
- no
- Remarks on result:
- other: No melting point was recorded up to 600°C.
- Conclusions:
- The melting behaviour of diytterbium trioxide was assessed according to the EU A.1 method and OECD test guideline 102 in compliance with GLP using Differential Scanning Calorimetry (DSC). No melting point of the test item was recorded up to 600°C.
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- no data
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- A special procedure was used to eliminate interaction of the material of the sample with the material of the support to determine the melting point of the oxide. The sample was heated with a tubular tungsten heater (8 mm in diameter with a 30 mm length of the working zone). The investigations were conducted in technical hydrogen or high-purity argon medium under a pressure of 3 atm. The melting point was measured with an optical pyrometer. During the measurement, the working volume was purged with gas to remove vapours of the investigated substance.
- GLP compliance:
- no
- Type of method:
- other: optical pyrometer
- Melting / freezing pt.:
- 2 645 K
- Atm. press.:
- 3 atm
- Remarks on result:
- other: 2645 ± 30 K
- Melting / freezing pt.:
- 2 371.85 °C
- Atm. press.:
- 3 atm
- Remarks on result:
- other: converted from K to °C
- Conclusions:
- Based on the experiments performed in this study, the melting temperature of diytterbium trioxide was found to be 2645 ± 30 K (i.e. 2371.85°C).
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- no data
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Principles of method if other than guideline:
- Data were obtained from the peer reviewed CRC handbook. No information on methodology given.
- GLP compliance:
- no
- Type of method:
- other: no data
- Melting / freezing pt.:
- 2 355
- Atm. press.:
- 101.325 kPa
- Conclusions:
- According to the peer reviewed CRC handbook, ytterbium oxide has a melting point of 2355°C.
Referenceopen allclose all
Assay No. 1 (isotherm at 25°C for 2 min, heating ramp: 25°C to 600°C at 10°C/min):
No melting point of the test item was recorded up to 600°C.
Assay No. 2 (isotherm at 25°C for 2 min, heating ramp: 25°C to 600°C at 10°C/min):
The second assay was similar to the first one.
No melting point of the test item was recorded up to 600°C.
Description of key information
In a GLP experiment assigned as key study (Klimisch 1, Demangel, 2017) and performed according to the EU A.1 method and OECD test guideline 102, no melting point of the test item was recorded up to 600°C, using Differential Scanning Calorimetry. No decomposition was observed either. The melting point was therefore considered to be > 600°C in this study. Because of the unbound value, data from literature (Mordovin et al., 1967) and the CRC Handbook of Chemistry and Physics (Haynes, 2016) were included in a weight of evidence approach together with the OECD 102 study. Mordovin et al. (1967) reported a melting point of 2645 ± 30 K for ytterbium oxide, which equals 2371.85°C. The CRC Handbook reported a melting point of 2355°C. The latter value was the lowest and was therefore taken as key value for the CSA. Both data sources were scored Klimisch 2.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 2 355 °C
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.
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