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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Additional information

The distribution in a sewage treatment plant (STP) has been estimated using the SimpleTreat model (implemented in EUSES 2.1.2), see table below.

Table4.2.2: Distribution modelling for STP

Fraction of emission directed to air by STP (%)

Fraction of emission directed to water by STP (%)

Fraction of emission directed to sludge by STP (%)

Fraction of the emission degraded in STP (%)






Triethoxy(2,4,4-trimethylpentyl)silane is not expected to undergo any significant biodegradation beyond that of the hydrolysis product ethanol, and is predicted to have moderate Henry’s Law constant and high log Kow/log Koc. Therefore, air and sludge are the main compartments to which it is expected to partition in a sewage treatment plant, with partition to water also being significant.