Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

1,1,1,3,5,5,5-heptamethyl-3-[(trimethylsilyl)oxy]trisiloxane hydrolyses to methylsilanetriol and trimethylsilanol with a hydrolysis half-life of greater than 48 hours. Therefore, the environmental hazard assessment is based on the properties of the parent substance in accordance with REACH guidance for Chemical Safety Assessment (Chapter R.16; ECHA, 2016).

Methylsilanetriol and trimethylsilanol are final products of hydrolytic reactions under the normal range of conditions of pH and temperature. However, other biotic or abiotic reactions may proceed over longer time-scales in the environment.

Additional information