Registration Dossier
Registration Dossier
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EC number: 216-467-0 | CAS number: 1591-02-2
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
log Kow [dibutoxy(dimethyl)silane]: 4.9 at 20°C (predicted)
log Kow [dimethylsilanediol]: -0.38 ± 0.04 at 20.2± 0.3°C (measured)
log Kaw [dimethylsilanediol]: -6.94 ± 0.33 at 20.2± 0.3°C (measured)
log Kow [n-butanol]: 0.88
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 4.9
- 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 dimethylsilanediol and n-butanol.
However, the log Kow of dibutoxy(dimethyl)silane has been predicted using a validated QSAR estimation method to be 4.9 at 20°C.
The silanol hydrolysis product, dimethylsilanediol, has a measured log Kow value of -0.38 ± 0.04 at 20.2± 0.3°C; log Kaw value of -6.94 ± 0.33 at 20.2± 0.3°C and log Koa value of 6.58±0.34 at 20.2± 0.3°C using a three phase equilibrium method.
n-Butanol has a reported log Kowvalue of 0.88 (OECD 2001).
OECD 2001SIDS Initial Assessment Report for 13th SIAM, Bern, Switzerland, 6 - 9 November 2001, n-butyl alcohol, CAS 71-36-3
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