Registration Dossier
Registration Dossier
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EC number: 240-597-7 | CAS number: 16529-65-0
Endpoint summary
Administrative data
Description of key information
Aquatic toxicity studies with zinc didocosanoate are not available. In the assessment of zinc didocosanoate, read-across to analogue substances and/or the assessment entities soluble zinc substances and docosanoic/behenic acid is conservatively applied since the ions of zinc didocosanoate determine its fate and toxicity in the environment.
Based on data of the analogue substance Fatty acids, C16-18, zinc salts, zinc didocosanoate (a zinc salt of a longer-chained fatty acid (C22)) with a lower zinc content and solubility is expected to have a low potential for toxicity to freshwater algae and invertebrates.
Reliable data available for analogue substances, soluble zinc substances and behenic acid indicate that the moiety of ecotoxicological concern are zinc cations. Aquatic toxicity data of behenic acid point to a low toxic potential to aquatic algae and invertebrates. The ecotoxic potential of the fatty acid chain, i.e. behenate, 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)).
Additional information
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