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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. The distribution calculation is done for the parent substance, 4,4,7,7-tetraethoxy-3,8-dioxa-4,7-disiladecane.

Table: Distribution modelling for STP

Fraction of emission directed to air by STP

6.4

[%]

Fraction of emission directed to water by STP

93.5

[%]

Fraction of emission directed to sludge by STP

0.16

[%]

Fraction of the emission degraded in STP

0

[%]

4,4,7,7-tetraethoxy-3,8-dioxa-4,7-disiladecane hydrolyses moderately to 1,1,1,4,4,4-hexahydroxy-1,4-silabutane and ethanol.

Ethanol is readily biodegradable. 1,1,1,4,4,4-Hexahydroxy-1,4-silabutane 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 4,4,7,7-tetraethoxy-3,8-dioxa-4,7-disiladecane is expected to partition in a sewage treatment plant. Water is also likely to be the main compartment to which 4,4,7,7-tetraethoxy-3,8-dioxa-4,7-disiladecane will partition in the wider environment.

Additional information