Registration Dossier
Registration Dossier
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EC number: 213-773-6 | CAS number: 1009-93-4
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
log Kow (2,2,4,4,6,6-hexamethylcyclotrisilazane): not relevant (hydrolyses very rapidly in water)
log Kow (dimethylsilanediol): -0.38 at 20°C (measured)
log Kow (ammonia): not applicable (inorganic)Key value for chemical safety assessment
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 very rapidly to form dimethylsilanediol and ammonia.
The log Kow of the silanol hydrolysis product, dimethylsilanediol was determined using a relevant test method to be -0.38 at 20°C .The result is considered to be reliable.
Log Kow is not applicable for the other hydrolysis product, ammonia, as it is inorganic. However, an indicative value of 0.23 has been predicted using the software KOWWIN (KOWWIN v1.68, US EPA, 2012). The value applies to non-ionised ammonia, NH3.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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