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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

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.

Diss Factsheets

Physical & Chemical properties

Partition coefficient

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Administrative data

Link to relevant study record(s)

Description of key information

Log Kow 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane: 2.5 at 20°C (QSAR)

Log Kow 2-(3,4-epoxycyclohexyl)ethylsilanetriol : -0.6 at 20°C(QSAR)

Log Kow (methanol): -0.82 to -0.64 (OECD 2004)

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 submission substance is waived because in contact with water the substance hydrolyses very rapidly (half-life 4 h at pH 7 , 0.2 h at pH 4, 0.1 h at pH 9 and 20-25°C) to form 2-(3,4-epoxycyclohexyl)ethylsilanetriol and methanol.

However, the log Kow of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane is calculated to be 2.5 at 20°C using a validated QSAR estimation method.

The log Kow of the silanol hydrolysis product 2-(3,4-epoxycyclohexyl)ethylsilanetriol has been calculated to be -0.6 at 20°C using a validated QSAR estimation method.

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

OECD 2004a: SIDS Initial Assessment Report for SIAM 19, Berlin, Germany, 18-20 October 2004, Methanol, CAS 67-56-1