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Toxicity to soil macroorganisms except arthropods

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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. 37 NOEC or EC10 values on soil macroorganisms exept arthropods are available covering 6 different worm species and range from 35.7 mg Zn/kg for  Enchytraeus albidus to 1634 mg Zn/kg dw for Lumbricus terrestris. 

Neodecanoate is mobile and does not have a high potential to partition into soil. Data on the toxicity to aquatic invertebrates point to a low (if any) toxic potential. The QSAR based estimation for toxicity of neodecanoic acid (CAS 26896-20-8) to earthworms performed with ECOSAR v1.11 (EPISuite v4.00) results in a 14-d LC50 of 1934 mg neodecanoic acid/L, indicating that the toxicity towards terrestrial invertebrates is low. Based on the low hazard potential of neodecanoate in the aquatic compartment and the low potential to adsorb to soil, a low toxic potential may be assumed for soil invertebrates.

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