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Ecotoxicological information

Toxicity to terrestrial arthropods

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Description of key information

Fatty acids, C14-18 and C16-18-unsatd., zinc salts:

Reliable soil toxicity studies of Fatty acids, C14-18 and C16-18-unsatd., zinc salts are not available. Thus, read-across to the assessment entities soluble zinc substances and C14-18 fatty acids is applied, since zinc cations and fatty acid anions determine its fate and toxicity in the environment. Since C14-18-satd. and C16-18-unsatd. fatty acids have a low potential for ecotoxicity, the hazard assessment of Fatty acids, C14-18 and C16-18-unsatd., zinc salts is based on zinc ions. Please refer to the endpoint summary of the respective assessment entity for further details.


Fatty acid anions (C14-18-satd. and C16-18-unsatd.):

Fatty acids as contained in plant and animal tissue are a natural component of soil, represent a significant part of the nutritional demands of living organisms, are rapidly degraded and non-bioaccumulative and have a of low toxic potential to terrestrial arthropods. Fatty acids have a low potential for toxicity to aquatic invertebrates. Honeybees, parasitic wasps (Aphidius rhopalosiphi), predatory mites (Typhlodromus pyri) and soil dwelling beetles (Poecilus cupreus) seem to be relatively insensitive to fatty acids in laboratory studies. Thus, based on the absence of a hazard potential in the aquatic compartment and for different soil arthropods, a low potential for toxicity to arthropods is assumed in soil.



Twenty-four NOEC/EC10 values are available for toxicity of Zn to reproduction of terrestrial arthropods, representing 2 different species and ranging from 14.6 to 1000 mg Zn/kg dw for Folsomia candida.

Key value for chemical safety assessment

Additional information