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Toxicity to microorganisms

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Toxicity studies of zinc bis(2-ethylhexanoate) on microorganisms 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: The lowest NOEC for nitrification inhibition amounts to 0.1 mg Zn/L based on an ISO 9509 nitrification inhibition test.

2-ethylhexanoic acid: EC10 (71.7 mg/L) and EC50 (112.1 mg/L) values were derived after 17 hours of exposure of Pseudomonas putida to 2-ethylhexanoate.

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

Key value for chemical safety assessment

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