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Physical & Chemical properties

Water solubility

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Description of key information

Water solubility (substance) = 36500 mg/l at 20°C
Water solubility (silanol hydrolysis product) = 1,000,000 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 hydrolyses to [3-(2,3-epoxypropoxy)propyl]silanetriol. The water solubilities of both the substance and the silanol hydrolysis product have been calculated using an appropriate predictive method; the silanol is predicted to be very water soluble. However, [3-(2,3-epoxypropoxy)propyl]silanetriol may undergo condensation reactions to give siloxane dimers, oligomers and polymers; this will limit its solubility in practice.