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Toxicity to terrestrial arthropods

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Description of key information

The chemical safety assessment according to Annex I of Regulation (EC) No. 1907/2006 does not indicate the need to investigate further the toxicity to terrestrial arthropods.

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Additional information

In accordance with Regulation (EC) No. 1907/2006, Annex IX, column 2, 9.4 further studies on the effects on terrestrial organisms do not have to be conducted since the chemical safety assessment indicates that there is no need. No experimental data on toxicity to terrestrial arthropods are available for fatty acids, C16-18, isotridecyl esters (CAS 95912-88-2). The test substance is characterised by a high log Koc (log Koc > 5) indicating a considerable potential for adsorption to soil particles. Therefore, tests with soil-dwelling organisms that feed on soil particles are most relevant for the evaluation of soil toxicity of fatty acids, C16-18, isotridecyl esters. Read-across in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5 from the structurally related category members fatty acids, C8-10, C12-18-alkyl esters (CAS 95912-86-0) and 2-octyldodecyl isooctadecanoate (CAS 93803-87-3) resulted in low toxicity to terrestrial macroorganisms (NOEC (56 d) 500 mg/kg soil dw and ≥ 1000 mg/kg soil dw, respectively). Moreover, no acute and chronic effects were observed in the available aquatic studies. Exposure of the soil compartment is generally considered to be low. Even if exposed to the soil the LCAE category members are readily biodegradable indicating that they will not be persistent in the environment. Indirect exposure via irrigation or atmospheric transport is considered to be negligible based on the physico-chemical properties of the LCAE category members (water solubility: < 1 mg/L or even < 0.05 mg/L; vapour pressure: <0.0001 Pa (minimum) - 0.11 Pa (maximum)). Thus, the available data investigating the toxicity to terrestrial macroorganisms are sufficient to assess the hazard of fatty acids, C16-18, isotridecyl esters to terrestrial organisms.