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The distribution in a sewage treatment plant (STP) has been estimated using the SimpleTreat model (implemented in EUSES 2.1.2/Chesar 3), see table below.

Table 4.2.3. Distribution modelling for STP

Fraction of emission directed to water by STP



Fraction of emission directed to air by STP



Fraction of emission directed to sludge by STP



Fraction of the emission degraded in STP



The 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 is the main compartment to which it is expected to partition in a sewage treatment plant, with partition to air and 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.