Registration Dossier
Registration Dossier
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The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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EC number: 211-656-4 | CAS number: 681-84-5
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
Log Kow (substance): -0.5 at 20°C (QSAR)
Log Kow (silanol hydrolysis product): not relevant
Key value for chemical safety assessment
Additional information
The requirement to test the substance for octanol-water partition coefficient is waived because in contact with water the substance hydrolyses very rapidly to form silicic acid and methanol. The log Kow of tetramethyl orthosilicate has been calculated using a validated QSAR. Determining the log Kow of the silanol hydrolysis product, silicic acid is not scientifically meaningful, as is an inorganic.
Methanol has a measured log Kowof -0.82 to -0.64 (OECD 2004a).
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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