Registration Dossier
Registration Dossier
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EC number: 222-164-4 | CAS number: 3375-31-3
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:
- 28 September 2010 to 25 November 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP compliant, guideline study. Available as an unpublished report. Acceptable without restrictions.
- 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:
- flask method
- Water solubility:
- 0.922 g/L
- Temp.:
- 20 °C
- pH:
- >= 3.2 - <= 3.7
- Details on results:
- The water solubility of the test item has been determined to be at least 0.437g/l of solution at 20.0 ± 0.5 °C monitoring the palladium concentration of the sample solutions; equivalent to a palladium acetate solubility of at least 0.922 g/l of solution at 20.0 ± 0.5 °C. However, the solubilised palladium content of the sample solutions was confirmed to be unstable, with a decreasing concentration being obtained when applying the standard test method with stepwise extension of the initial sample saturation period. the definitive test result reported was obtained from a preliminary test from which the maximum observed solubility was achieved, applying an initial saturation period of 18.5 hrs and a final equilibration period of 4 hours respectively.
- Conclusions:
- The water solubility of the test item has been determined to be at least 0.437g/l of solution at 20.0 ± 0.5 °C monitoring the palladium concentration of the sample solutions; equivalent to a palladium acetate solubility of at least 0.922 g/l of solution at 20.0 ± 0.5 °C. However, the solubilised palladium content of the sample solutions was confirmed to be unstable, with a decreasing concentration being obtained when applying the standard test method with stepwise extension of the initial sample saturation period. the definitive test result reported was obtained from a preliminary test from which the maximum observed solubility was achieved, applying an initial saturation period of 18.5 hrs and a final equilibration period of 4 hours respectively.
- Executive summary:
This is a GLP compliant, guideline study considered suitable for use as the key study for this endpoint.
The water solubility of the test item has been determined to be at least 0.437g/l of solution at 20.0 ± 0.5 °C monitoring the palladium concentration of the sample solutions; equivalent to a palladium acetate solubility of at least 0.922 g/l of solution at 20.0 ± 0.5 °C. However, the solubilised palladium content of the sample solutions was confirmed to be unstable, with a decreasing concentration being obtained when applying the standard test method with stepwise extension of the initial sample saturation period. the definitive test result reported was obtained from a preliminary test from which the maximum observed solubility was achieved, applying an initial saturation period of 18.5 hrs and a final equilibration period of 4 hours respectively.
Reference
Description of key information
The water solubility of palladium (II) acetate has been determined to be at least 0.437 g/l of solution at 20.0 ± 0.5 °C monitoring the palladium concentration of the sample solutions; equivalent to a palladium acetate solubility of at least 0.922 g/l of solution at 20.0 ± 0.5 °C.
The solubility of palladium(II) acetate in a 24h TDp screening test was determined at 11% at pH6 and 8.5 (Brouwers, 2020)
Key value for chemical safety assessment
- Water solubility:
- 0.922 g/L
- at the temperature of:
- 20 °C
Additional information
O’Connor and Woolley (2011) conducted a GLP compliant study following OECD TG 105 and is considered suitable for use as the key study for this endpoint. The water solubility of the test item has been determined to be at least 0.437g/l of solution at 20.0 ± 0.5 °C monitoring the palladium concentration of the sample solutions; equivalent to a palladium acetate solubility of at least 0.922 g/l of solution at 20.0 ± 0.5 °C. However, the solubilised palladium content of the sample solutions was confirmed to be unstable, with a decreasing concentration being obtained when applying the standard test method with stepwise extension of the initial sample saturation period. The definitive test result reported was obtained from a preliminary test from which the maximum observed solubility was achieved, applying an initial saturation period of 18.5 hrs and a final equilibration period of 4 hours respectively
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