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Environmental fate & pathways

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Abiotic degradation

Triethoxy(3-thiocyanatopropyl)silane has a hydrolysis half-life of 23 hours at 25°C and pH 7 (measured).

The hydrolysis products are (3-thiocyanatopropyl)silanetriol and ethanol.

Half-lives of 0.5 days and 0.7 days for reaction with hydroxyl radicals in air have been calculated for triethoxy(3-thiocyanatopropyl)silane and (3-thiocyanatopropyl)silanetriol respectively.

Biotic degradation

53% biodegradation in 28 days was attained in a reliable ready biodegradation study conducted according to an appropriate test protocol, and in compliance with GLP. This biodegradation is attributable to the biodegradation of the ethanol hydrolysis product, which is readily biodegradable (OECD 2004). No significant biodegradation is expected for the silanol hydrolysis product.

It is not necessary to obtain further information on biodegradation via simulation tests in water, sediment or soil.

Table 4.1.4: Degradation rates

Degradation rate in water:

Hydrolysis half-life: 23 h at 25°C and pH 7. No significant biodegradation expected for the silanol hydrolysis product.

Degradation rate in sediment:

Hydrolysis may occur (hydrolysis half-life in water 23 h at 25°C and pH 7). No significant biodegradation expected for the silanol hydrolysis product.

Degradation rate in soil:

Hydrolysis may occur (hydrolysis half-life in water 23 h at 25°C and pH 7). No significant biodegradation expected for the silanol hydrolysis product.

Degradation rate in air:

Half-life for reaction with hydroxyl radicals in air: 0.5 days for parent substance 0.7 days for silanol hydrolysis product (calculated).

Additional information