Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key 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

 

[2-(Perfluorohexyl)ethyl]silanetriol (Silanol HP)

Ethanol

[2-(Perfluorohexyl)ethyl]triethoxysilane (Parent)

 

Fraction of emission directed to water by STP

96.78%

12.62%

3.737%

[%]

Fraction of emission directed to air by STP

0.014%

0.07%

33.72%

[%]

Fraction of emission directed to sludge by STP

3.201%

0.069%

62.53%

[%]

Fraction of the emission degraded in STP

0%

87.23%

0%

[%]

The submission substance is not expected to undergo any significant biodegradation and is predicted to have very high Henry’s Law constant and has high predicted log Kow/log Koc. Sludge and air are the main compartments to which it is expected to partition in a sewage treatment plant, with partition to water also being significant. The low solubility of the substance in water may affect the distribution within the sewage treatment plant model in the environmental exposure assessment. Please refer to Section 9 of the CSR.

Additional information