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Physical & Chemical properties

Partition coefficient

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Description of key information

The partition coefficient n-octanol / water (Kow) of the substance was determined according to OECD guideline no. 117 [2004] and EU test method A.8 [2008] with the HPLC method. Two constituents were separated with values of log Kow = 3.5 and 3.6 at 22.8 °C. The signal intensities indicate the following assignment:
log Kow = 3.5 for 2,2,4-trimethyl-6-({[3-(trimethoxysilyl)propyl]carbamoyl}oxy)hexyl N-[3-(trimethoxysilyl)propyl]carbamate
log Kow = 3.6 for 2,4,4-trimethyl-6-({[3-(trimethoxysilyl)propyl]carbamoyl}oxy)hexyl N-[3-(trimethoxysilyl)propyl]carbamate

Key value for chemical safety assessment

Log Kow (Log Pow):
3.6
at the temperature of:
25 °C

Additional information

Because of the rapid hydrolysis, the potential for bioaccumlation or soil sorption is considered to be low.

The difference between the experimental value of log Kow = 3.5 -3.6 and the QSAR value of log Kow 1.78 reflects the limitations of the QSAR method for large and complex molecular structures.