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Diss Factsheets
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EC number: 947-747-7 | 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
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 13 July 2016 - 27 September 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- other: read-across target
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- column elution method
- Key result
- Water solubility:
- < 0.001 mg/L
- Conc. based on:
- element (dissolved fraction)
- Remarks:
- zirconium
- Temp.:
- 20 °C
- pH:
- 6.4
- Key result
- Water solubility:
- < 0.001 mg/L
- Conc. based on:
- element (dissolved fraction)
- Remarks:
- erbium
- Temp.:
- 20 °C
- pH:
- 6.4
- Details on results:
- Results were validated by:
- Linearity validation: The analysis showed a good linearity of the method (r > 0.99).
- Accuracy validation: Results of accuracy in dilution mixture showed a good accuracy which indicates acceptable data (recoveries ranged between 75% and 125%).
- Repeatability validation: The results indicated a good precision of the data.
- Specificity: The intensity (CPS) of blank samples measured was negligible or similar to solvent intensity.
- Limit of quantification: The LOQ was set at 0.1 ng/mL for Er (0.001 mg/L in the sample) and 0.15 ng/mL for Zr (0.001 mg/L in the sample).
- Limit of detection: The LOD was found to be 0.025 ng/mL for Er and 0.050 ng/mL for Zr. - Conclusions:
- Under the conditions of the study, the test material is considered to be insoluble in water.
- Executive summary:
The water solubility of the test material was investigated in a study which was conducted in accordance with the standardised methods OECD 105 and EU Method A.6, under GLP conditions, following the column elution method.
Zirconium concentrations were measured because zirconium represents the most dominant element in the material. Of the other elements, only erbium concentrations were measured because based on relative presence in the material and water solubility of the oxide forms, this element could reasonably be expected to be released the most (if any) from erbium gadolinium yttrium zirconium oxide, when in water. Both zirconium concentrations and erbium concentrations were however below the LOQ (0.001 mg/L for both elements) in all samples analysed, at a pH of 6.4 and a temperature of 20 °C. In conclusion, erbium gadolinium yttrium zirconium oxide is considered to be insoluble in water.
- Endpoint:
- water solubility
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Study conducted on read-across material
- Justification for type of information:
- Read-across to structurally similar substance erbium, gadolinium, yttrium and zirconium oxide (EC 946-001-8). The only difference between the substance being registered and the read-across substance is that the substance to be registered is missing the gadolinium oxide content (about 1.4%). The absence of this compound at such a low % is considered highly unlikely to affect its properties.
- Reason / purpose for cross-reference:
- read-across source
- Water solubility:
- < 0.001 mg/L
- Conc. based on:
- element (dissolved fraction)
- Remarks:
- zirconium
- Temp.:
- 20 °C
- pH:
- 6.4
- Water solubility:
- < 0.001 mg/L
- Conc. based on:
- element (dissolved fraction)
- Remarks:
- erbium
- Temp.:
- 20 °C
- pH:
- 6.4
Referenceopen allclose all
Results of the preliminary test with milliQ water at pH 6.4 are as follows:
Amount of test material weighed (g) | 0.01 |
Volume of water added (mL) | 1000 |
Solubility (yes/no) | no (after 120 h of agitation) |
Based on the preliminary test, the solubility of the test material is < 0.01 g/L. Therefore the main test was performed using the column elution method.
Results of the main test, expressed as erbium:
Solubility expressed as erbium content in water (mg/L) |
Mean pH measured | Temperature (°C) | |
Test 1 (flow 25 mL/hour) |
< LOQ | 6.4 | 20°C |
Test 2 (flow 25 mL/hour) |
0.001 | 6.4 | 20°C |
Test 3 (flow 12.5 mL/hour) |
< LOQ | 6.4 | 20°C |
Mean | < LOQ (0.001 mg/L) | 6.4 | 20°C |
Results of the main test expressed as zirconium:
Solubility expressed as zirconium content in water (mg/L) |
Mean pH measured | Temperature (°C) | |
Test 1 (flow 25 mL/hour) |
< LOQ | 6.4 | 20°C |
Test 2 (flow 25 mL/hour) |
< LOQ | 6.4 | 20°C |
Test 3 (flow 12.5 mL/hour) |
< LOQ | 6.4 | 20°C |
Mean | < LOQ (0.001 mg/L) | 6.4 | 20°C |
The mean solubility in water is below LOQ at pH 6.4 and at 20°C (expressed as zirconium content in water).
Description of key information
Read-across to structurally similar substance erbium, gadolinium, yttrium and zirconium oxide (EC 946-001-8)
Under the conditions of the study, erbium gadolinium yttrium zirconium oxide is considered to be insoluble in water.
Key value for chemical safety assessment
Additional information
The water solubility of the test material was investigated in a study which was conducted in accordance with the standardised methods OECD 105 and EU Method A.6, under GLP conditions, following the column elution method. The study was conducted on the read-across substance
erbium, gadolinium, yttrium and zirconium oxide (EC 946-001-8). The only difference between the substance being registered and the read-across substance is that the substance to be registered is missing the gadolinium oxide content (about 1.4%). The absence of this compound at such a low % is considered highly unlikely to affect its properties.
During the study, zirconium concentrations were measured because zirconium represents the most dominant element in the material. Of the other elements, only erbium concentrations were measured because based on relative presence in the material and water solubility of the oxide forms, this element could reasonably be expected to be released the most (if any) from erbium gadolinium yttrium zirconium oxide, when in water. Both zirconium concentrations and erbium concentrations were however below the LOQ (0.001 mg/L for both elements) in all samples analysed, at a pH of 6.4 and a temperature of 20°C. In conclusion, erbium gadolinium yttrium zirconium oxide is considered to be insoluble in water.
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.
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