Registration Dossier
Registration Dossier
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EC number: 605-318-9 | CAS number: 163206-31-3
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
In accordance with column 2 of REACH Annex IX, the bioaccumulation in
aquatic species study does not need to be conducted as direct or indirect exposure of the aquatic compartment is unlikely. Additionally, systemic bioavailability of the substance is not expected due to the present toxicological study results as no systemic toxicity could be observed. Further the substance is an UVCB and the single constituents of the registered substance have a high molecular weight and are structurally very branched molecules indicating a low potential for crossing biological membranes and as a conclusion the potential for bioaccumulation is reduced. The smallest constituent is the trimer having a molecular weight of 792.99 g/mol and displays ca. 60 % of the substance. The other constituents are significantly larger (pentamerous (ca. 20 %), the heptamerous (ca. 11 %) and the oligomers with n >=9 (ca. 10 %)) and have therefore even higher molecular weights.
To summarize, the substance is not entering into the environment, is not expected to be bioavailable and due to the large size and the molecular weight of the single constituents the potential for crossing biological membranes is reduced. As a conclusion, there is no potential for bioaccumulation of the substance and therefore a study for bioaccumulation is overestimated and considering animal welfare not justified.
Key value for chemical safety assessment
Additional information
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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