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Physical & Chemical properties

Water solubility

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Description of key information

Water solubility: 1000000 mg/L at 20°C (silanol hydrolysis product)

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 to isobutylsilanetriol and hydrogen chloride. The water solubility of isobutylsilanetriol has been calculated using an appropriate predictive method; it is predicted to be miscible. However, isobutylsilanetriol may undergo condensation reactions to give siloxane dimers, oligomers and polymers; this will limit its solubility in practise.