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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Administrative data

Link to relevant study record(s)

bioaccumulation in aquatic species: fish
Data waiving:
other justification
Justification for data waiving:
the study does not need to be conducted because the substance has a low potential for bioaccumulation based on log Kow <=3

Description of key information

Key value for chemical safety assessment

Additional information

The substance hydrolyses rapidly to substances which have low log Kow values (<3) and thus have low potential for bioaccumulation. Therefore, in accordance with Column 2 of REACH Annex IX, the bioaccumulation in aquatic species study does not need to be conducted.

N-[3-(dimethoxymethylsilyl)-2-methylpropyl]ethylenediamine hydrolyses in contact with water to the corresponding N-[3-(dihydroxymethylsilyl)-2-methylpropyl]ethylenediamine and methanol. Methanol is considered non-hazardous at the concentrations at which it would be present in the studies assessed. Therefore, the hazard assessment for the environment, including sediment and soil compartments, is based on the properties of the hydrolysis product, N-[3-(dihydroxymethylsilyl)-2-methylpropyl]ethylenediamine, in accordance with REACH guidance. Due to the rapidly hydrolyses of N-[3-(dimethoxymethylsilyl)-2-methylpropyl]ethylenediamineto N-[3-(dihydroxymethylsilyl)-2-methylpropyl]ethylenediamine (half-life 15 minutes), the bioaccumulation of the hydrolysis product is more relevant for the environmental assessment.