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Physical & Chemical properties

Water solubility

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Description of key information

Water solubility (substance): Not relevant
Water solubility (silanol hydrolysis product): 1,000,000 mg/L at 20°C

Key value for chemical safety assessment

Water solubility:
1 000 000 mg/L
at the temperature of:
20 °C

Additional information

The requirement to test the substance for water solubility is waived becasue in contact with water the substance rapidly hydrolyses to form phenylsilanetriol and hydrogen chloride. A water solubility of 1,000,000 mg/l for the hydrolysis product phenylsilanetriol has been determined using an appropriate QSAR. In practice, the water solubility of the silanol is limited by its tendency to undergo condensation reactions to form siloxanes. A highly cross-linked gel may form. Significant condensation is not expected at concentrations < ca. 200 mg/l.