Registration Dossier
Registration Dossier
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EC number: 931-286-3 | CAS number: 12068-49-4
Water solubility
Administrative data
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2008-10-01 - 2009-01
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP-study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 009
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
Test material
- Reference substance name:
- dialuminium iron tetraoxide, spinel type
- EC Number:
- 924-056-9
- Cas Number:
- 1302-61-0
- Molecular formula:
- Al2FeO4
- IUPAC Name:
- dialuminium iron tetraoxide, spinel type
Constituent 1
Results and discussion
Water solubility
- Water solubility:
- < 0.03 mg/L
- Temp.:
- 20 °C
- pH:
- > 7.9 - < 8.1
Any other information on results incl. tables
The concentrations were sufficiently constant during the tests. The difference between the concentrations of aluminium respectively iron of day 1 to 3 was 15 % at both tests. Therefore the mean of day 1 - 3 was taken as the solubility of the test substance at 20 °C, according to the guidelines. Two repeat samples and 3 times each were used to calculate the mean solubility.
| nominal loading rate (mg/l) | temperature (°C) |
pH | mean solubilityof aluminium (mg/l) | SD | mean solubilityof iron (mg/l) | SD |
| 1000 | 20 | 7.9 -8.1 | 0.0037 | 0.00010 | <0.1 | -- |
The water solubility of the test substance at 20 °C was calculated from the determined concentrations of Al and Fe and the content of the elements in the test substance (26.0 % for Al and 33.6 % for Fe). As it was not known, if the dissolved Al- or Fe-concentration originated from the spinel itself or from unreacted starting materials used in the production of the spinel or from impurities, the water solubility was termed water solubility of "test substance equivalents".
| nominal loading rate | water solubility of test substance equivalents calculated from aluminium concentration (mg/l) | water solubility of test substance equivalents calculated from iron concentration (mg/l) |
| 1000 | 0.014 | <0.03 |
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information): insoluble (< 0.1 mg/L)
The mean solubility of aluminium is 0.0037 mg/l, < 0.01 mg/l for iron respectively.
The water solubility of the "Hercynite" is <0.03 mg / L at 20 °C. - Executive summary:
The mean solubility of aluminium is 0.0037 mg/l, < 0.01 mg/l for iron respectively.
The water solubility of the unchanged test substance "Hercynite" is < 0.03 mg / L at 20 °C.
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