Registration Dossier
Registration Dossier
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EC number: 213-912-0 | CAS number: 1066-35-9
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
Water solubility (substance): Not relevant
Water solubility (silanol hydrolysis product, dimethylsilanol): 6200 mg/L at 20°C
Water solubility (silanol hydrolysis product, dimethylsilanediol): 430,000 mg/L at 20°C
Key value for chemical safety assessment
Additional information
The requirement to test the substance for water solubility is waived because in contact with water the substance rapidly hydrolyses very rapidly.
The water solubilities of the hydrolysis products dimethylsilanol and dimethylsilanediol are relevant. Values of 6200 mg/l and 1,000,000 mg/l at 20°C have been calculated for dimethylsilanol and dimethylsilanediol, respectively, using an appropriate QSAR.
In practice, the water solubility of the silanols is limited by their tendency to undergo condensation reactions to form siloxanes. A highly cross-linked gel may form. Significant condensation is not expected at concentrations < approx. 100 mg/l, but is dependent on specific conditions.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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
