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Diss Factsheets

Ecotoxicological information

Sediment toxicity

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Description of key information

Toxicity studies of zinc bis(2-ethylhexanoate) with sediment dwelling organisms are not available. Thus, read-across to the assessment entities soluble zinc substances and 2-ethylhexanoic acid is applied since the ions of zinc bis(2-ethylhexanoate) determine its fate and toxicity in the environment.

Zinc: Chronic toxicity data for 7 freshwater sediment and 2 marine sediment species are available with a species mean NOECadded values ranging from 146 to 1101 mg Zn/kg dw (background-corrected) for freshwater and marine NOEC values of 207.1 and 490 mg Zn/kg dw for A. marina and M. plumulosa, respectively.

2-ethylhexanoic acid: Sediment toxicity data of 2-ethylhexanoate are not available and not considered to be required for the following reasons: (i) 2-ethylhexanoate has a low potential for aquatic toxicity, (ii) is readily biodegradable, and (iii) according to predictions of the Level III fugacity model of EPI Suite (v4.11) for the partitioning between air, soil, sediment and water, has a very low potential to partition into sediment (0.089 %). Thus, sediment toxicity of 2 -ethylhexanoate is highly unlikely.

In sum, zinc bis(2-ethylhexanoate) seems to have some potential for toxicity to sediment organisms.

Key value for chemical safety assessment

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