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EC number: 945-888-9 | CAS number: -
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.
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