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Environmental fate & pathways

Bioaccumulation: terrestrial

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Description of key information

Zinc bis[12-hydroxyoctadecanoate]:
Bioaccumulation of zinc bis[12-hydroxyoctadecanoate] in animals and biomagnification (i.e. accumulation and transfer through the food chain) is not considered relevant.
Zinc is an essential element which is actively regulated by organisms, so bioconcentration/bioaccumulation is not considered relevant.

Key value for chemical safety assessment

Additional information

Zinc bis[12-hydroxyoctadecanoate]:

Based on read-across of zinc bioaccumulation data and the fact that zinc bis[12-hydroxyoctadecanoate] is readily biodegradable, bioaccumulation and biomagnification are not expected to be relevant for zinc bis[12-hydroxyoctadecanoate]. For a comprehensive overview of the bioaccumulation of zinc or the lack thereof, see the hazard assessment of "Zinc" within the framework of Regulation (EC) No 1907/2006 in Appendix 1 of the CSR and cited in excerpts below.These conclusions are similar to the conclusions for a structural analogue from the EU RAR Zinc distearate (CAS-No.: 557-05-1 & 91051-01-3 EINECS-No.: 209-151-9 & 293-049-4) Part 1 - Environment (Final report R074_0805_env, May 2008 ("Based on data on bioaccumulation of zinc in animals and on biomagnification (i.e. accumulation and transfer through the food chain), secondary poisoning is considered to be not relevant in the effect assessment of zinc..." "Distearate is not expected to bioaccumulate, knowing that fatty acids will degrade by the β oxidation pathway."


Bioaccumulation is not considered relevant for essential elements because of the general presence of homeostatic control mechanisms. The data from a field food chain transfer study indicate that bioconcentration of zinc is indeed very low. It is in all cases also lower in contaminated soil, as compared to control soil.