Registration Dossier
Registration Dossier
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EC number: 701-177-3 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
N-methyl-N-(C18-(unsaturated)alkanoyl)glycine (EC 701-177-3) is an acid, characterized by a low water solubility (0.44 mg/L) and low vapor pressure (1.31E-4 Pa at 20 °C). The low vapour pressure indicates that the substance is not volatile and that evaporation to air and subsequent transport through the atmosphere to other environmental compartments is not likely.
There is no study available, investigating the log Koc of N-methyl-N-(C18-(unsaturated)alkanoyl)glycine (EC 701-177-3). Therefore, the log Koc was calculated for all three main constituents of the substance with the Franco, Fu and Trapp model (2009) for ionisable acids at the environmentally relevant pH values 4, 7 and 9. The required model input parameters are the pH value (4, 7, and 9), the pKa value (5.0, 20 °C, OECD 112) and the log Pn (3.5 and 4.20), corresponding to the log Kow for the neutral molecule (≥ 3.5 ≤ 4.2, 20 °C, EU A.8, HPLC). All molecules fall within the applicability domain of the model (pKa and log Kow). The estimated log Koc (ChemProp v6.5, Franco, Fu, Trapp_Koc for ionizable substances) is 2.99 – 3.37 at pH 4, 2.08 – 2.27 at pH 7 and 1.93 – 2.01 at pH 9, suggesting a moderate potential for adsorption to particles present in soil and sediment. However, due to its ready biodegradability, the substance will not persist in these compartments.
Due to low water solubility (0.44 mg/L), low vapour pressure (1.31E-4 Pa at 20 °C) and a moderate log Koc of 2.08 - 2.27 at pH7, the substance will distribute mainly into water. However, due to its ready biodegradability, the substance will not persist in these compartments.
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