Registration Dossier
Registration Dossier
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EC number: 270-451-8 | CAS number: 68440-34-6
Toxicity to terrestrial arthropods
Administrative data
Link to relevant study record(s)
Description of key information
FATTY ACIDS, C14 -18 AND C16 -18 -UNSATD., ZINC SALTS:
As terrestrial toxicity data are not available for Fatty acids, C14-C18 and C16-18-unsatd., zinc salts, read-across is made to insoluble/slightly soluble zinc substances.
ZINC:
Twenty-four NOEC/EC10 values are available for toxicity of Zn to reproduction of terrestrial arthropods, representing 2 different species and ranging between 14.6 and 1000 mg Zn/kg dw (both for Folsomia candida).
Key value for chemical safety assessment
Additional information
As terrestrial toxicity data are not availablefor Fatty acids, tallow, zinc salts or for the read-across substance Fatty acids, C16 - 18, zinc salts, a read-across to inorganic zinc substances is made as a worst case approachin accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5. As in the EU Risk Assessment Report (RAR) for zinc stearate, it is assumed that upon dissolutionFatty acids, tallow, zinc saltsis changed in part to ionic zinc and that only ionic zinc is determining biological activities. The data available for zinc is summarized below. For a comprehensive overview of the ecotoxicity of zinc, see the hazard assessment of "Zinc" within the framework of Regulation (EC) No 1907/2006.
ZINC:
In total 61 individual high quality NOEC or EC10 values for reproduction of terrestrial invertebrates are selected for the PNEC derivation. Twenty-four NOEC/EC10 values are available for toxicity of Zn to reproduction of terrestrial arthropods, representing 2 different species and ranging between 14.6 and 1000 mg Zn/kg dw (both for Folsomia candida; Lock and Janssen, 2001 and Lock et al., 2003).
All toxicity data are expressed as added Zn concentration in soil, based on either the nominal dose added or on measured, background corrected soil Zn concentrations.
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