Registration Dossier
Registration Dossier
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EC number: 429-270-1 | CAS number: 136210-30-5
Endpoint summary
Administrative data
Description of key information
Additional information
The potential of the structural analogue aspartic acid, N,N'-[methylenebis(2-methyl-4,1-cyclohexanediyl)]bis-, 1,1',4,4'-tetraethyl ester to sorb on soil or sediment was determined according to EU-Method C.19 (HPLC-Method) yielding a logKoc between 4.2 and 5.1 (Bayer AG, 2003). The sorption coefficient was determined at pH 6 and pH 8 showing that the sorption behaviour does not depend on the prevailing pH. According to the classification of Swann et al. (1983), aspartic acid, N,N'-[methylenebis(2-methyl-4,1-cyclohexanediyl)]bis-, 1,1',4,4'-tetraethyl ester has a high potential to sorb on soil.
Study was performed with aspartic acid, N,N'-[methylenebis(2-methyl-4,1-cyclohexanediyl)]bis-, 1,1',4,4'-tetraethyl ester which is a structural analogue to aspartic acid, N,N'-(methylenedi-4,1-cyclohexanediyl)bis-, 1,1',4,4'-tetraethyl ester. Both substances are diethyl esters of aspartic acid linked to a dicyclohexylmethyldiamine moiety. The difference between these two substances is merely the presence of two methyl groups connected to the cyclohexane rings. This structural analogy was confirmed by the Member State responsible for the notification of both substances under the NONS regulation. The Member State decided that test results obtained for one substance can be transferred to the other substance and that testing of both substances is usually not required. This decision is in accordance with the grouping of substances and read-across approach in Annex XI, 1.5 of the REACH Regulation.
Aspartic acid, N,N'-(methylenedi-4,1-cyclohexanediyl)bis-, 1,1',4,4'-tetraethyl ester is characterised by a calculated Henry Law Constant of 0.01 Pa*m³/mol (Currenta, 2009b). According to Thomas, cited in the "Handbook of Chemical property Estimation Methods" (Lyman, 1980), the substance has to be scored as non-volatile from water.
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