Registration Dossier
Registration Dossier
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EC number: 292-772-2 | CAS number: 90990-11-7
Long-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
No data for Fatty acids, C18 -22 (CAS 90990 -11 -7) are available on long-term toxicity to aquatic invertebrates.
However, Fatty acids (C10 – C22) are essential for aquatic organisms. They are readily biodegradable and are poorly water soluble which qualify these substances as difficult to test according to OECD 23. Due to substance properties, a reasonable dose-response curve cannot be established. Following the standard test of OECD 211 instable test substance concentrations are recognized only after the test has been finalized. The OECD protocol foresees the TWA (time weighted average) approach in cases where test concentrations are instable. These TWA results have to be considered “artefacts” because favourable substance properties like “rapid biodegradation”, “effective metabolism e.g. in algae”, “rapid decay in water, sediment, soil” lead to very low TWA values. These TWA values are found to be below 1 mg/L. Despite low TWA values no C&L = “N” is assigned. This would obviously contradict the fact that these substances are not posing a danger to aquatic organisms.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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