Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

The substance hydrolyses to tris(1-methylethyl)silanol and acrylic acid with a hydrolysis half-life of less than 12 hours. Therefore, the environmental hazard assessment, including sediment and soil compartments due to water and moisture being present, is based on the properties of the hydrolysis products in accordance with REACH guidance for Chemical Safety Assessment (Chapter R16).

Tris(1-methylethyl)silanol and acrylic acid are the final product of hydrolysis reactions under conditions of a hydrolysis laboratory study and is the hydrolysis products relevant to conventional REACH Chemical Safety Assessment. However, other biotic or abiotic reactions may occur over longer time-scales 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