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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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. Due to the very rapid hydrolysis of trimethoxy(vinyl)silane (CAS 2768-02-7; EC No. 220-449-8), the distribution calculation is done for the hydrolysis products, vinylsilanetriol (CAS 143-48-6) and methanol (CAS 67-56-1; EC No. 200-659-6).

Table: Distribution modelling for STP

 

Vinylsilanetriol

Methanol

Unit

Fraction of emission directed to water by STP

99.98

12.62

[%]

Fraction of emission directed to air by STP

2.57E-7

0.095

[%]

Fraction of emission directed to sludge by STP

0.012

0.037

[%]

Fraction of the emission degraded in STP

0

87.24

[%]

Trimethoxy(vinyl)silane hydrolyses very rapidly to form vinylsilanetriol and methanol. Methanol is readily biodegradable. Vinylsilanetriol is not expected to undergo any significant biodegradation and is predicted to have low Henry’s Law constant and low log Kow/log Koc. Distribution modelling for STP indicates that water is the main compartment to which it is expected to partition in a sewage treatment plant. Water is also likely to be the main compartment to which vinylsilanetriol will partition in the wider environment.