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Environmental fate & pathways

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Description of key information

The distribution in a sewage treatment plant (STP) has been estimated using the SimpleTreat model (implemented in Chesar 3.5/EUSES 2.1.2), see table below. Due to the very rapid hydrolysis of the parent substance, the distribution calculation is done for the hydrolysis products.

Table: 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




N-[3-(Dimethoxymethylsilyl)propyl]ethylenediamine hydrolyses very rapidly in contact with water to form N-[3-(dihydroxymethylsilyl)propyl]ethylenediamine and methanol. N-[3-(Dihydroxymethylsilyl)propyl]ethylenediamine 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.

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