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Diss Factsheets

Ecotoxicological information

Toxicity to terrestrial plants

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Link to relevant study record(s)

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 plants.

Key value for chemical safety assessment

Additional information

In accordance with Regulation (EC) No. 1907/2006, Annex IX, 9.4, column 2, 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 plants are available for fatty acids, C16-18, 2-octyldodecyl esters (CAS 96690-38-9). The test substance is characterised by a high log Koc (log Koc > 5) indicating a considerable potential for adsorption to the soil particles. Due to the low water solubility (< 0.05 mg/L), only low concentrations are expected in the pore water, which is the main exposure route for terrestrial plants. Therefore, tests soil-dwelling organisms like earthworm which allows potential uptake via surface contact, soil particle ingestion and pore water (ECHA, 2012), are most relevant for the evaluation of soil toxicity of fatty acids, C16-18, 2-octyldodecyl esters. In addition, in the absence of a clear indication of selective toxicity, an invertebrate (earthworm or collembolan) test is preferred, as outlined in ECHA guidance section R., page 122 (ECHA, 2012). Chronic earthworm data are available for the structurally related category member 2-octyldodecyl isooctadecanoate (CAS 93803-87-3). The study with the read-across substance 2-octyldodecyl isooctadecanoate resulted in no effects on reproduction after 56 d of exposure resulting in a NOEC (56 d) ≥ 1000 mg/kg soil dw. No higher toxicity of the test substance is expected for terrestrial plants in comparison to soil macroorganisms. In accordance with Regulation (EC) No. 1907/2006, Annex IX, Column 2, 9.4 further studies on the effects on plants do not have to be conducted since the chemical safety assessment indicates that toxicity to terrestrial plants is not expected to be of concern.