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Toxicity to terrestrial plants

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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 plants.

Key value for chemical safety assessment

Additional information

No experimental data on toxicity to terrestrial plants are available for 2-octyldodecyl isooctadecanoate (CAS 93803-87-3). 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. Exposure of plants to the substance is thus expected to be very limited. Therefore, tests with soil-dwelling organisms like the earthworm which allows potential uptake via surface contact, soil particle ingestion and porewater (ECHA, 2012), are most relevant for the evaluation of soil toxicity of 2-octyldodecyl isooctadecanoate. 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). A chronic study according to OECD 222 is available showing no effects on reproduction of earthworms (NOEC (56 d) ≥ 1000 mg/kg soil dw). Based on the result in the earthworm study and the fact that the substance is poorly soluble in water (< 0.05 mg/L), which is the main uptake route for terrestrial plants, no toxicity of the test substance is expected. 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.