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Diss Factsheets
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EC number: 953-470-2 | 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
Density
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From 17 June 2021 to 29 September 2021
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Remarks:
- Other physico-chemical endpoints are covered in the study report of Demangel (2021).
- Reason / purpose for cross-reference:
- reference to same study
- Remarks:
- Other physico-chemical endpoints are covered in the study report of Demangel (2021).
- Reason / purpose for cross-reference:
- reference to same study
- Remarks:
- Other physico-chemical endpoints are covered in the study report of Demangel (2021).
- Reason / purpose for cross-reference:
- reference to same study
- Remarks:
- Other physico-chemical endpoints are covered in the study report of Demangel (2021).
- Reason / purpose for cross-reference:
- reference to same study
- Remarks:
- Other physico-chemical endpoints are covered in the study report of Demangel (2021).
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 109 (Density of Liquids and Solids)
- Version / remarks:
- Version: 2012
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- GLP certificate dated from 04 May 2021.
- Type of method:
- air comparison pycnometer (for solids)
- Key result
- Type:
- relative density
- Density:
- 6.803
- Temp.:
- 20 °C
- Remarks on result:
- other: ± 0.004
- Conclusions:
- The relative density of cerium gadolinium oxide is equal to 6.803 ± 0.004.
- Executive summary:
The relative density of cerium gadolinium oxide was investigated in a GLP-compliant study according to OECD TG 109 using the gas comparison pycnometer (DSC) method. The relative density was determined to be equal to 6.803 ± 0.004.
- Endpoint:
- density, other
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- From June 2021 to 13 October 2021
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods with acceptable restrictions
- Remarks:
- The density was part of the information measured in the context of the study from Mathiak (2021) dedicated to assess the dustiness of the test substance. Therefore, determination of density was not the ultimate aim of this study, and no guideline was followed. However, the method used (i.e. air comparison pycnometry) was the same as the one used in the key study of Demangel (2021) and the results are pretty similar.
- Reason / purpose for cross-reference:
- reference to same study
- Remarks:
- Other physico-chemical endpoints are covered in the study report of Mathiak (2021).
- Reason / purpose for cross-reference:
- reference to same study
- Remarks:
- Other physico-chemical endpoints are covered in the study report of Mathiak (2021).
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Air comparison pycnometry.
- GLP compliance:
- no
- Type of method:
- air comparison pycnometer (for solids)
- Type:
- density
- Density:
- 6.909 g/cm³
- Temp.:
- 26.33 °C
- Remarks on result:
- other: ± 0.0057 g/cm3
- Conclusions:
- The density of cerium gadolinium oxide is equal to 6.9085 ± 0.0057 g/cm3.
- Executive summary:
The density of cerium gadolinium oxide was determined as part of a non-GLP compliant study dealing with another endpoint. The gas comparison pycnometer (DSC) method was used, but no guideline was followed. The density was determined to be equal to 6.9085 ± 0.0057 g/cm3.
Referenceopen allclose all
| Assay 1 | Assay 2 | |
Test item weight (g) | 49.8110 | 47.3260 | |
Measured density (g/cm3) | #1 | 6.8416 | 6.8468 |
#2 | 6.8202 | 6.8252 | |
#3 | 6.8096 | 6.8087 | |
#4 | 6.8065 | 6.7921 | |
#5 | 6.7933 | 6.7980 | |
#6 | 6.8049 | 6.7797 | |
#7 | 6.8072 | 6.7907 | |
#8 | 6.7930 | 6.7850 | |
#9 | 6.7966 | 6.7829 | |
#10 | 6.7932 | 6.7781 | |
Mean density (g/cm3) | 6.8066 ± 0.0144 | 6.7987 ± 0.0211 | |
Relative density (no unit) | 6.807 | 6.799 | |
Mean relative density (no unit) | 6.803 ± 0.004 |
Cycles of measurement | Volume (cm3) | Density (g/cm3) |
#1 | 1.1845 | 6.9064 |
#2 | 1.1855 | 6.9009 |
#3 | 1.1830 | 6.9152 |
#4 | 1.1847 | 6.9053 |
#5 | 1.1825 | 6.9182 |
#6 | 1.1855 | 6.9005 |
#7 | 1.1833 | 6.9134 |
#8 | 1.1846 | 6.9059 |
#9 | 1.1834 | 6.9127 |
#10 | 1.1844 | 6.9070 |
Mean | 1.1842 ± 0.0010 | 6.9085 ± 0.0057 |
Description of key information
The relative density of cerium gadolinium oxide is equal to 6.803 ± 0.004.
Key value for chemical safety assessment
- Relative density at 20C:
- 6.803
Additional information
An experimental study performed under GLP compliance and in accordance with OECD TG 109 was flagged as a key study and assigned a Klimisch score of 1. It reports that cerium gadolinium oxide has a relative density of 6.803 ± 0.004 (corresponding to a density of 6.8027 g/cm3). Another experimental study performed using the same experimental method (i.e. air comparison pycnometry), but not following a standard guideline and not GLP-compliant, was flagged as a supporting study and assigned a Klimisch score of 2. It reports a pretty similar density for cerium gadolinium oxide (6.9085 g/cm3).
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