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Environmental fate & pathways

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Since (i) Fatty acids, C14-18 and C16-18-unsatd., zinc salts is readily biodegradable based on data from analogous substances, (ii) zinc is a homeostatically controlled and essential element, and (iii) fatty acids as contained in plant and animal tissue are a natural component of environmental systems, represent a significant part of the nutritional demands of aquatic and soil organisms, are rapidly degraded and non-bioaccumulative, bioaccumulation and biomagnification are not expected to be relevant for Fatty acids, C14-18 and C16-18-unsatd., zinc salts. These conclusions are similar to the conclusions on a structural analogue (i.e. similar fatty acid zinc salt) in 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 (http://echa.europa.eu/documents/10162/08799aec-42c5-44e0-9969-baa022c66db1):"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." Please refer to the endpoint summary of the respective assessment entity for further details.

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