Registration Dossier
Registration Dossier
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EC number: 203-492-7 | CAS number: 107-46-0
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.
Table: Distribution modelling for STP
Fraction of emission directed to air by STP |
87.3 |
[%] |
|||
Fraction of emission directed to water by STP |
4.67 |
[%] |
|||
Fraction of emission directed to sludge by STP |
8.01 |
[%] |
|||
Fraction of the emission degraded in STP |
0 |
[%] |
Hexamethyldisiloxane is not expected to undergo any significant biodegradation, has very high Henry’s Law constant and high log Kow/log Koc. Therefore air is the main compartment to which it is expected to partition in a sewage treatment plant. Some partition to sewage sludge and water is expected, and therefore potentially to soil/sediment compartments in the environment.
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