Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

The substance hydrolyses to (3-{[3-(trihydroxysilyl)propyl]disulfanyl}propyl)silanetriol and ethanol with a hydrolysis half-life of greater than 40 hours. 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, ECHA 2016). The environmental hazard assessment for the sediment and soil compartments are considered for both parent substance and silanol hydrolysis product.


(3-{[3-(Trihydroxysilyl) propyl]disulfanyl}propyl)silanetriol is the expected final product of hydrolysis reactions under conditions of a hydrolysis laboratory study. However, other biotic or abiotic reactions may proceed over longer timescales in the environment.


The substance has a named impurity that is similar in structure and therefore the impurity will have similar physicochemical properties and assessment approaches.



ECHA (2016). REACH Guidance on Information Requirements and Chemical Safety Assessment Chapter R16: Environmental Exposure Assessment Version: 3.0. February 2016

Additional information