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Short-term toxicity to aquatic invertebrates

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Description of key information

Titanium nitride is not toxic to Daphnia magna under the conditions of OECD guideline 202.

Key value for chemical safety assessment

Additional information

In a 48-h acute toxicity study according to OECD guideline 202 (GLP), Daphnia magna were exposed to titanium nitride at nominal concentrations of 0 (control), 6.25, 12.5, 25, 50 and 100 mg TiN/L under static conditions. 

As measured titanium concentrations were below the limits of quantification (2 µg/L) at toxicity test initiation and at test termination in all control and test exposures, effect values were based on nominal loading rates.

Titanium nitride did not show acute toxicity in D. magna after 48-hour exposure at concentrations up to 100 mg/L. Thus, an acute EC50 value of greater than 100 mg/L titanium nitride (nominal) was determined in this study.

Based on the results of this study, titanium nitride would not be classified as toxic to D. magna in accordance with the classification system of CLP.