Registration Dossier
Registration Dossier
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EC number: 700-093-4 | CAS number: 176969-34-9
Water solubility
Administrative data
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 008
- Report date:
- 2008
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- GLP compliance:
- yes
- Type of method:
- flask method
Test material
- Test material form:
- solid: particulate/powder
Constituent 1
Results and discussion
Water solubilityopen allclose all
- Key result
- Water solubility:
- 2.95 g/L
- Temp.:
- 20 °C
- pH:
- 2.9
- Remarks on result:
- other: Solubility in water (distilled water being in equilibrium with atmospheric carbon dioxide)
- Key result
- Water solubility:
- 4.41 g/L
- Temp.:
- 20 °C
- pH:
- 4.01
- Remarks on result:
- other: The pH was adjusted with solid sodium carbonate until a stable pH was reached
- Key result
- Water solubility:
- 39.99 g/L
- Temp.:
- 20 °C
- pH:
- 7.04
- Remarks on result:
- other: The pH was adjusted with solid sodium carbonate until a stable pH was reached
- Key result
- Water solubility:
- 61.96 g/L
- Temp.:
- 20 °C
- pH:
- 9.04
- Remarks on result:
- other: The pH was adjusted with solid sodium carbonate until a stable pH was reached
Any other information on results incl. tables
Conclusion:
The water solubility of the test item was found to be significantly dependent on the pH-value. Therefore it was necessary to adjust the pH.
At the expected concentration range at pH 4 to pH 9 the dissociation of the test item to its corresponding salt had more influence on the pH of the solution than buffering with 0.05 M buffers.
Therefore, as well to prevent the influence of carbon dioxide uptake and loss as volume expansion, solid sodium carbonate was employed for the pH adjustments.
In the same way it can be estimated that under environmental conditions the water solubility of the test item in the assigned pH range will depend
on the specific counter ion to the anion of the test item. Thus a determination of water solubility in the assigned pH range with one specific counter ion is not useful
for modelling the transfer of the test item and anion into groundwater.
pH / solubility relationship at 20°C
| pH | 2.90 | 4.01 | 7.04 | 9.04 |
| Temperature [°C] | 20 | 20 | 20 | 20 |
| Solubility [g/l] | 2.95 | 4.41 | 39.99 | 61.96 |
Applicant's summary and conclusion
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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