Registration Dossier
Registration Dossier
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EC number: 245-642-4 | CAS number: 23410-40-4
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because the substance has a low octanol water partition coefficient and the adsorption potential of this substance is related to this parameter
Reference
Description of key information
Key value for chemical safety assessment
Additional information
N-[3-(dimethoxymethylsilyl)-2-methylpropyl]ethylenediamine hydrolyses in contact with water to the corresponding N-[3-(dihydroxymethylsilyl)-2-methylpropyl]ethylenediamine, which have low log Kow values (<3) and thus have low potential for adsorption/desorption. Therefore, in accordance with Column 2 of REACH Annex VIII, the adsorption/desorption screening test does not need to be conducted, and also there is no need for further information on adsorption/desorption.
Though the hydrolysis product is expected to be surface active, the surface activity is weak and non-ionic. Therefore, it is considered appropriate to waive the adsorption testing based on low log Kow, and to get an indicative adsorption potential value based on the log Kow prediction method.
Adsorption of the hydrolysis product N-[3-(dihydroxymethylsilyl)-2-methylpropyl]ethylenediamine
has been estimated using two separate estimation methodologies. The log KOC of 2.8 (Koc of 638.3) (KOCWIN MCI prediction method) and 0.31 (Koc of 2.05) (TGD Kow predicition method) were obtained using an accepted QSAR (SRC EPIWIN v4.10). The result is considered to be reliable.
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