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Physical & Chemical properties

Water solubility

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Description of key information

For platinum dioxide, in the 24-hour scoping tests at 100 mg/L measured concentrations were 107 µg/L at pH 6 and 101 µg/L at pH 8. In the definitive tests, the net average concentrations increased relatively rapidly to the limiting values of 1.3 µg/L at a loading rate of 1 mg/L after 28 days and 12.4 µg/L and 112.7 µg/L, at loadings rates of 10 and 100 mg/L respectively, after 7 days.

Key value for chemical safety assessment

Water solubility:
112.7 µg/L
at the temperature of:
21.5 °C

Additional information

Skeaff and Beaudoin (2011) is a guideline transformation / dissolution study and is adequate for assessment as a key study for this endpoint.

24-hour scoping studies were conducted at pH 6 and pH 8.5 at a 100 mg/L loading rate. Definitive studies were then conducted at 10 and 100 mg/L (7 days) and 1 mg/L (28 days), all at pH 6.

For platinum dioxide, in the 24-hour scoping tests at 100 mg/L measured concentrations were 107 µg/L at pH 6 and 101 µg/L at pH 8. In the definitive tests, the net average concentrations increased relatively rapidly to the limiting values of 1.3 µg/L at a loading rate of 1 mg/L after 28 days and 12.4 µg/L and 112.7 µg/L, at loadings rates of 10 and 100 mg/L respectively, after 7 days.