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Long-term toxicity to aquatic invertebrates

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Read-across to the assessment entities soluble zinc substances and neodecanoic acid is applied for the assessment of zinc neodecanoate, basic since the ions of zinc neodecanoate, basic determine its fate and toxicity in the environment. Reliable data available for soluble zinc substances and neodecanoate indicate that the moiety of ecotoloxicological concern are zinc cations. The NOEC values for 13 freshwater species range from 0.014 to 0.400 mg Zn/L and for 26 marine species from 0.0056 and 0.9 mg Zn/L (all dissolved). A 21-d NOEC of 4.78 mg/L neoheptanoic acid (structural analogue of neodecanoic acid) for reproduction of Daphnia magna indicates a low potential for chronic toxicity of neodecanoate to aquatic invertebrates, which is confirmed by the chronic Value (ChV) of 1.7 mg/L (QSAR-based estimate) derived for daphnids.

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