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Short-term toxicity to aquatic invertebrates

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Aquatic toxicity data of oleic acid, copper salt are not available. Thus, read-across to the assessment entities soluble copper substances and oleic acid is applied since the ions of oleic acid, copper salt determine its fate and toxicity in the environment.Reliable studies indicate that the moiety of ecotoxicological concern are copper cations. Regarding copper toxicity in aquatic environments, a large set of data is available including multiple studies on Ceriodaphnia dubia and Daphnia magna as summarized in the attached report “Derivation of acute Ecotoxicity Reference Values (ERVs) for copper” with species-specific geometric mean E(L)C50 values ranging from 12.6 to 40.0 microg Cu/L and 16.3 to 66.2 microg Cu/L, respectively. Data for oleic acid (i.e. C18- fatty acid) point to a low (if any) toxic potential to aquatic invertebrates.

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