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EC number: 270-451-8 | CAS number: 68440-34-6
Long-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
No relevant data available
Key value for chemical safety assessment
Additional information
No chronic fish 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). In accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5 data available on the long-term toxicity of inorganic zinc compounds to fish is taken into account and discussed below assuming that only ionic zinc is determining for biological activities of Fatty acids, tallow, zinc salts.
Fish are generally less sensitive than algae for zinc compounds and since long-term values for algae are available, a further long-term fish 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 fish toxicity study is not considered necessary and is not justified with regard to animal welfare.
ZINC:
Extensive high quality chronic data were available on 7 (freshwater) and 1 (marine) fish species. These data were all screened for relevancy to the environment under study.
The freshwater species are part of 4 families: Cyprinodontidae (Jordanella), Cyprinidae (Phoxinus, Pimephales), Salmonidae (Oncorrhynchus, Salvelinus, Salmo trutta) and Cottidae (Cottus). The sensitivity of these species is equally distributed over the species sensitivity distribution. For O. mykiss, the species mean effect value at pH 8 is 146 µg/L (hardness 45 mg/L, DOC 2 mg/L). Using the corresponding species BLM gives a species NOEC of 146 µg/L at pH 6 (other conditions same).
The saltwater species comes from the family Clupeidae (Clupea harengus). This species is not among the most sensitive ones in the species sensitivity distribution.
The data shows that fish are less sensitive compared to algae, as summarised in the overall endpoint summary 6.1. For a comprehensive overview of the acute toxicity of (soluble) zinc to fish,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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