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Environmental fate & pathways

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Table. Degradation rates

Degradation rate in water:

Hydrolysis half-life (isocyanate group): <5 minutes at pH 7.

Hydrolysis half-life (triethoxysilane group): 8.5 h at pH 7.

No significant biodegradation expected for the final silanol hydrolysis product (3-aminopropylsilanetriol).

Degradation rate in sediment:

No significant biodegradation expected for the final silanol hydrolysis product (3-aminopropylsilanetriol).

Degradation rate in soil:

No significant biodegradation expected for the final silanol hydrolysis product (3-aminopropylsilanetriol).

Degradation rate in air:

Half-life for reaction with hydroxyl radicals in air: 0.7 days for parent; 0.3 days for intermediate silanol hydrolysis product, 3-aminopropyltriethoxysilane and 0.4 days for silanol hydrolysis product, 3-aminopropylsilanetriol (predicted).

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