Registration Dossier

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 hazard identified

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 for bioaccumulation

Additional information

Conclusion on classification

According to the results of the Transformation/Dissolution protocol (pH 8; ca. 22 °C; 7d; 100 mg/L loading), Zr and Hf are not released from the test item as measured concentrations were below the detection limit (see section 4.8 of the present dossier). Yb could be analytically verified at 0.069 µg/L and is hence the relevant component for the assessment of potential ecotoxicological effects. As Yb is only released in the low µg/L range and available ecotoxicological studies with YbHfZrO2 in Daphnia (Knauer 2016, section 6.1.3) and algae (Knauer 2016, section 6.1.5) did not reveal any adverse effects at nominal concentrations of 100 mg/L, toxic effects on other organisms are as well not expected and are considered highly unlikely.