Registration Dossier
Registration Dossier
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EC number: 253-973-0 | CAS number: 38495-30-6
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
log Kow [12,12-dimethyl-2,5,8,11,13,16,19,22-octaoxa-12-silatricosane]: 0.3 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 [2-[2-(2-methoxyethoxy)ethoxy]ethan-1-ol]: -1.12 at 25°C
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 0.3
- at the temperature of:
- 20 °C
Additional information
The log Kow of the substance has been predicted using a validated QSAR estimation method to be 0.3 at 20°C.
In contact with water, the substance hydrolyses moderately rapidly to form dimethylsilanediol and 2-[2-(2-methoxyethoxy)ethoxy]ethan-1-ol [triethylene glycol, CAS 112-35-6].
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.
On the ECHA disseminated dossier webpage, the non-silanol hydrolysis product, 2-[2-(2-methoxyethoxy)ethoxy]ethan-1-ol has a reported log Kowvalue of -1.12 at 25°C and pH 7.
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