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Water solubility

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Description of key information

Titanium nitride was tested in accordance with OECD Guidance Document No. 29 (transformation/dissolution test). The highest solubility was measured with a loading rate of 100 mg/L at pH 6 after 7 days, which was 23.8 µg Ti/L.

Key value for chemical safety assessment

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

Additional information

A transformation/dissolution test in accordance with OECD guidance document No. 29 was carried out to study the potential of titanium nitride (100% purity) to release metal ions into the environment. A 24-hour screening test was conducted to determine the pH of maximum titanium release. Based on the results, a full main test was performed at pH 6. The mean titanium concentration after 28 days with a loading rate of 1 mg/L was < 0.197 µg/L, after 7 days with a loading rate of 10 mg/L the mean titanium concentration was 7.76 µg/L and after 7 days with a loading rate of 100 mg/L the mean concentration of titanium was 23.8 µg/L.