Registration Dossier
Registration Dossier
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EC number: 457-670-6 | CAS number: 157859-20-6
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
Sediment organism toxicity studies have not been conducted for tri(isopropyl)silyl acrylate. However, they are not required for Annex IX substances under the REACH Regulation. The registered substance hydrolyses very rapidly to tris(1-methylethyl)silanol and acrylic acid.
Tris(1-methylethyl)silanol has a log Kow value of 3.9. Therefore, the need for further testing is assessed by deriving a PNEC from the Equilibrium Partitioning method (EqP) and deriving a risk characterisation by deriving a PEC/PNEC ratio (see Section 10).
Acrylic acid has a log Kow value of 0.46 at 25°C for the molecular form and -2.3 for the ionised form present at pH 7, and therefore further consideration of the sediment compartment is not required.
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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