Registration Dossier
Registration Dossier
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EC number: 293-026-9 | CAS number: 91050-80-5
Toxicity to terrestrial plants
Administrative data
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, tetraesters with 3,3'-oxybis[1,2-propanediol] (CAS 91050-80-5). 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 concentrationms 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 porewater (ECHA, 2012), are most relevant for the evaluation of soil toxicity of Fatty acids, C16-18, tetraesters with 3,3'-oxybis[1,2-propanediol]. ]. 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.7.11.5.3, page 122 (ECHA, 2012). Chronic soil macroorganism data are available from a structurally related analogue substance 1,2,3 –propanetriol, homopolymer, diisooctadecanoate (CAS 63705-03-3) in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5. This study show effects on reproduction for earthworms in a chronic test according to OECD 222 (NOEC (56 d) = 250 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.
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