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Partition coefficient

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Description of key information

Log Kow (trimethoxy(2-methylpropyl)silane): 2.1 at 20°C (QSAR)
Log Kow ((2-methylpropyl)silanetriol): -1.0 at 20°C (QSAR)

Key value for chemical safety assessment

Log Kow (Log Pow):
at the temperature of:
20 °C

Additional information

The requirement to test the substance for octanol-water partition coefficient is waived because in contact with water the substance very rapidly hydrolyses to form (2 -methylpropyl)silanetriol and methanol. The log Kow values of the substance and its silanol hydrolysis product have been calculated using a validated QSAR.

Methanol has a measured log Kow of -0.82 to -0.64 (OECD 2004a).