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EC number: 219-787-9 | CAS number: 2530-87-2
Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- the study does not need to be conducted because the substance decomposes
Reference
Description of key information
log Kow [(3-chloropropyl)trimethoxysilane]: Not relevant due to rapid hydrolysis in contact with water but predicted to be 2.0 (QSAR)
log Kow [(3-chloropropyl)silanetriol]: -1.1 at pH 7 (QSAR)
log Kow [methanol]: 0.82 to -0.64
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 2
- at the temperature of:
- 20 °C
Additional information
The requirement to conduct an n-octanol/water partition coefficient for the substance is waived because in contact with water, the substance hydrolyses rapidly to form (3-chloropropyl)silanetriol and methanol.
However, the log Kow of the parent substance has been predicted to be 2.0 at 20°C using a validated QSAR estimation method.
The silanol hydrolysis product; (3-chloropropyl)silanetriol has a predicted log Kow value of -1.1 using a validated QSAR estimation method.
Methanol has a reported log Kow value of -0.82 to -0.64 (OECD 2004).
Reference:
OECD (2004): SIDS Initial Assessment Report for SIAM 19, Berlin, Germany, 18-20 October 2004, Methanol, CAS 67-56-1.
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