Registration Dossier

Diss Factsheets

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no hazard identified

Marine water

Hazard assessment conclusion:
no hazard identified

STP

Hazard assessment conclusion:
no data: aquatic toxicity unlikely

Sediment (freshwater)

Hazard assessment conclusion:
no hazard identified

Sediment (marine water)

Hazard assessment conclusion:
no hazard identified

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential to cause toxic effects if accumulated (in higher organisms) via the food chain

Additional information

In general, the hazard assessment is based on the concentration of the Ti ion in environmental media. As the T/D test could only demonstrate very low release release of Ti from TiN (23.8 µg/L), but the release of Ti ions in environmentally relevant test media is even below 2 µg/L, and toxic effects were not observed in any of the available aquatic acute toxicity studies, hazards for the environment were not identified. Thus, derivation of PNECs is not necessary.

Conclusion on classification

In available studies investigating the acute aquatic toxicity of titanium nitride to fish, invertebrates and algae, no adverse effects attributable to dissolved titanium could be identified, irrespective of test species and trophic level. The solubility of the test substance in relevant toxicity test media was below 2 µg/L (limit of quantification) at test initiation and at test termination in all controls and test exposures.

Therefore, no hazard to aquatic organisms is identified. Titanium nitride hence does not require classification for environmental hazards.