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EC number: 252-161-3
CAS number: 34708-08-2
(CAS 34708-08-2; EC No. 252-161-3) has a
hydrolysis half-life of 23 hours at 25°C and pH 7 (measured).
The hydrolysis products are (3-thiocyanatopropyl)silanetriol
and ethanol (CAS 64-17-5; EC No. 200-578-6).
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.
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
It is not necessary to obtain
further information on biodegradation via simulation tests in water,
sediment or soil.
Table 4.1.4: Degradation
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:
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).
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