Registration Dossier
Registration Dossier
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EC number: 915-673-4 | CAS number: 211519-85-6
Endpoint summary
Administrative data
Description of key information
- 3-{[3-(trihydroxysilyl)propyl]disulfanyl}propyl)silanetriol
- (3-{[3-(trihydroxysilyl)propyl]trisulfanyl}propyl)silanetriol
- [3-({[3-(trihydroxysilyl)propyl]disulfanyl}disulfanyl)propyl]silanetriol
- (3-{[3-(trihydroxysilyl)propyl]pentasulfanyl}propyl)silanetriol
The substance is a multi-constituent substance containing S2-S4 as the main constituents with S5 identified as a named impurity. The constituents of the substance, bis[3-(triethoxysilyl)propyl]polysulfides, hydrolyse with a hydrolysis half-life of greater than 40 hours. The hydrolysis products, bis[3-(trihydroxysilyl)propyl]polysulfides, are:
The other hydrolysis product is ethanol. Given the rate of hydrolysis, the environmental hazard assessment for the aquatic compartment including wastewater treatment plant, is based on the properties of the parent substance in accordance with REACH guidance for Chemical Safety Assessment (Chapter R16). The environmental hazard assessment for the sediment and soil compartments are considered for both parent substance, bis[3-(triethoxysilyl)propyl]polysulfides and the silanol hydrolysis product.
The silanol hydrolysis products listed above are the expected final product of hydrolysis reactions under conditions of a hydrolysis laboratory study. However, other biotic or abiotic reactions may occur over longer timescales in the environment
Reference:
ECHA (2016). REACH Guidance on Information Requirements and Chemical Safety Assessment Chapter R16: Environmental Exposure Assessment Version: 3.0. February 2016
Additional information
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