Registration Dossier
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EC number: 270-451-8 | CAS number: 68440-34-6
Long-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
No relevant data available
Key value for chemical safety assessment
Additional information
As no chronic invertebrate toxicity data are available for Fatty acids, tallow, zinc salts or for the structural analogue Fatty acids, C16-18, zinc salts (CAS No. 91051-01-3) a read-across to insoluble/ slightly soluble zinc substances is madein accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5. It is assumed that upon dissolution the substance is changed in part to ionic zinc and that only ionic zinc is determining biological activities. For a comprehensive overview of the toxicity of zinc, see the hazard assessment of "Zinc" within the framework of Regulation (EC) 1907/2006 below.
Based on the data on zinc toxicity, aquatic invertebrates were not identified as the most sensitive organisms but algae. A further long-term invertebrate study on Fatty acids, zinc salts would probably not lead to lower values and would thus not influence the hazard assessment. Therefore, a further long-term invertebrate toxicity study is not considered necessary.
ZINC:
Extensive high quality chronic data were available on 13 different freshwater invertebrate species and 26 marine invertebrate species. These data were all screened for relevancy to the environment under study.
The freshwater species are part of several different taxonomic groups: poriferans (4 species), molluscs (2 species), crustaceans (4 species), rotifers (2 species) and insects (1 species). The sensitivity of these species is equally distributed over the species sensitivity distribution.
The marine species are part of several different taxonomic groups: annelids (4 species), cniderians (1 species), crustaceans (6 species), echinoderms (5 species), molluscs (9 species) and nematods (1 species) .The sensitivity of these species is equally distributed over the species sensitivity distribution.
The data show that aquatic invertebrates are less sensitive to zinc than algae, as summarised in the overall endpoint summary 6.1. For a comprehensive overview of the acute toxicity of (soluble) zinc to aquatic invertebrates,see Chemical Safety Assessment of "Zinc" within the framework of Regulation (EC) No 1907/2006 in the technical dossier (IUCLID section 13).
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