Registration Dossier
Registration Dossier
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EC number: 233-238-0 | CAS number: 10099-59-9
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
In a GLP study according to the preliminary test as specified in test method EC A.6 and OECD Guideline 105, lanthanum trinitrate was determined to be very soluble in water with a maximum solubility in the range of 1.23 to 1.58 kg/L, at 20°C and pH 1.79 (Demangel, 2012). It is important to note that the solubility was significantly decreased when the pH was adjusted to environmental values (i.e. pH = 6.92) due to the precipitation of the test item.
Key value for chemical safety assessment
- Water solubility:
- 100 g/L
- at the temperature of:
- 20 °C
Additional information
Although the maximum solubility in water was determined to be in the range of 1.23 x 10E3 g/L to 1.58 x 10E3 g/L, a bounded value of 100 g/L is used as the key value for chemical safety assessment, being the maximum value for water solubility as defined in the EUSES program. The maximum solubility did not change when increasing the pH to approx 5.3, while above (i.e. pH=6.92, not possible to reach a pH>7) the test item precipitated and the solution became pasty.
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