Registration Dossier
Registration Dossier
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EC number: 231-163-8 | CAS number: 7440-55-3
Water solubility
Administrative data
Link to relevant study record(s)
- 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
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Version / remarks:
- flask method
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
- Specific details on test material used for the study:
- test material received as small solid droplets, diamter approximately 3-4 mm
- Key result
- Water solubility:
- 45.99 µg/L
- Conc. based on:
- element
- Remarks:
- Ga
- Loading of aqueous phase:
- 500 mg/L
- Incubation duration:
- >= 36 - <= 38 d
- Temp.:
- 20 °C
- pH:
- >= 5.4 - <= 6
- Remarks on result:
- other: Result is mean solubility for 2 replicates as measured on day 36, 37 and 38. Standard deviation of solubility: 1.08 µg Ga/L
- Details on results:
- A tendency of increasing dissolved gallium concentrations was not observed after day 36 until day 38, and dissolved Ga concentrations in respective samples did not differ by more than 15 % indicating equilibrium conditions. Moreover, during the test until day 16 the measured gallium concentrations in vessel 1 compared to vessel 2 clearly differ from each other. This might be due to small differences in the Ga droplet surfaces. After day 36 the concentrations in vessel 1 and vessel 2 converged and were quantified to be in the same range.
- Conclusions:
- The mean dissolved Ga concentration at equilibrium is 46 µg Ga/L.
Reference
Description of key information
flask method according to OECD 105 guideline. Under the conditions of this test (loadings 500 g test item/L in two replicate vessels), a solubility equilibrium was observed starting on day 36 and the test was determined on day 38.The mean dissolved gallium concentration at 20.0 ± 1.0°C as measured on day 36, 37 and 38 amounts to 45.99 ± 1.08 µg Ga/L (separated by filtration from undissolved test item). The pH of solutions containing the test item and in method blanks were in the range of 5.4 – 6.0.
Key value for chemical safety assessment
- Water solubility:
- 46 µg/L
- at the temperature of:
- 20 °C
Additional information
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