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Ecotoxicological information

Short-term toxicity to fish

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Aquatic toxicity studies with zinc ditetradecanoate are not available. In the assessment of zinc ditetradecanoate, read-across to analogue substances and/or the assessment entities soluble zinc substances and tetradecanoic/myristic acid is conservatively applied since the ions of zinc ditetradecanoate determine its fate and toxicity in the environment.

The EC50 values for the acute toxicity of the analogue substances zinc dilaurate (zinc salt of a C12-fatty acid) and Fatty acids, C16-18, zinc salts to Danio rerio are > 10 mg/L and > 10,000 mg/L, respectively, and thus above the water solubility limit of zinc ditetradecanoate of 1.14 mg/L. Thus, zinc salts of shorter- and longer-chained fatty acids appear to have a low potential for toxicity to freshwater fish. A similar low potential is assumed for zinc ditetradecanoate.

Further, data available for soluble zinc substances and myristic acid indicate that the moiety of ecotoxicological concern are zinc cations. Aquatic toxicity data of myristic acid point to a low toxic potential to aquatic fish as it is part of their daily diet. The ecotoxic potential of the fatty acid chain, i.e. myristate, is assumed to be negligible. Fatty acids are generally not considered to represent a risk to the environment, which is reflected in their exclusion from REACH registration requirements (c.f. REACH Annex V (Regulation (EC) No 987/2008)).

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