Registration Dossier
Registration Dossier
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EC number: 939-125-9 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
There are no ready biodegradation data available for the substance hydrolysis products of 3-(triethoxysilyl) propan-1-amine > 0.1% - <16% (w/w) (EC no. 939-125-9). In order to fulfil the standard information requirements set out in Annex VIII, read-across from a structurally related substance 3-(triethoxysilyl) propan-1-amine (CAS no. 919-30-2), is conducted in accordance with Annex XI, 1.5, of Regulation (EC) No 1907/2006. This read across is justified as the parent material, 3-(triethoxysilyl) propan-1-amine, hydrolyses rapidly in water to form the target substance hydrolysis products of 3-(triethoxysilyl) propan-1-amine > 0.1% - <16% (w/w) (EC no. 939-125-9). Therefore, it can be expected that both substances have a similar behaviour under aqueous condition during the eco- and toxicological testing. The hydrolysis product silanol and condensation products dimers, trimers and polymers of siloxanes have the similar functional group (-O-Si- or HO-Si-). Therefore they are considered to be in one class of compounds and structural differences are not supposed to contribute to significant differences in activity, with respect to eco- and human toxicological endpoints. The other hydrolysis product is ethanol, being readily biodegradable, well characterised and not expected to have adverse effects on microorganisms.
Based on read across to the parent substance 3-(triethoxysilyl) propan-1-amine (CAS no. 919-30-2), the target substance, hydrolysis products of 3-(triethoxysilyl) propan-1-amine > 0.1% - <16% (w/w) (EC no. 939-125-9), is considered to be readily biodegradable. Furthermore, due to the low log Pow (<3) the test substance is not bioaccumulative and not highly adsorptive. Therefore, in accordance with column 2 of Annex VIII 9.3.1 of Regulation (EC) 1907/2006 studies on adsorption/desorption do not have to be conducted.
Due to the low log Pow (<3) and the presence as aqueous solution, water is expected to be the main target compartment for environmental distribution for the substance hydrolysis products of 3-(triethoxysilyl) propan-1-amine > 0.1% - <16% (w/w) (EC no. 939-125-9).
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