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Dissociation constant

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Description of key information

Dissociation constant (trimethoxyphenylsilane): not relevant
Dissociation constant (silanol hydrolysis product): approximately 10

Key value for chemical safety assessment

Additional information

The requirement to test the substance for dissociation constant is waived because in contact with water the substance rapidly hydrolyses to form phenylsilanetriol and methanol. Measured data is available for phenylsilanetriol, which has an (approximate) dissociation constant of pKa =10 .