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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 rapid hydrolysis of the parent substance, the distribution calculation is done for the silanol hydrolysis product

Table. Distribution modelling for STP

Fraction of emission directed to air by STP

6.18E-04

[%]

Fraction of emission directed to water by STP

99.9

[%]

Fraction of emission directed to sludge by STP

0.0831

[%]

Fraction of the emission degraded in STP

0

[%]

Summary

Dichloro(dimethyl)silane hydrolyses very rapidly to dimethylsilanediol. Dimethylsilanediol is not expected to undergo any significant biodegradation, has low Henry’s Law constant and low log Kow/log Koc. Therefore water is the main compartment to which it is expected to partition in a sewage treatment plant.