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Physical & Chemical properties

Partition coefficient

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Description of key information

log Kow [ tri(isopropoxy)(vinyl)silane]: 3.8 at 20°C (QSAR)

log Kow [vinylsilanetriol]: -2.0 at 20°C (QSAR)

log Kow [isopropanol]: 0.05

Key value for chemical safety assessment

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

Additional information

The requirement to conduct an n-octanol/water partition coefficient study for the substance is waived because in contact with water, the substance hydrolyses rapidly to form vinylsilanetriol and isopropanol.

However, the log Kow of the submission substance was predicted to be 3.8 at 20°C using a validated QSAR estimation method.

The log Kow of the silanol hydrolysis product, vinylsilanetriol has been predicted to be -2.0 at 20°C using a validated QSAR estimation method.

Isopropanol has a reported log Kow value of 0.05 (Hansch et al., 1995).


Hansch et al., (1995). Hansch C, Leo A and Hoekman D. Exploring QSAR. Hydrophobic, Electronic, and Steric Constants. ACS Professional Reference Book. Washington, DC: American Chemical Society.