Registration Dossier
Registration Dossier
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EC number: 204-469-4 | CAS number: 121-44-8
Endpoint summary
Administrative data
Description of key information
Additional information
Regarding transport and distribution in the environment triethylamine data for adsorption / desorption as well as values for the Henry´s Law constant are available. Soil adsorption is not expected to be an important environmental fate for the test substance. A Koc of 107.2 (logKoc = 2.03) was calculated with the help of the computer program SCR PCKOWINv1.66 (BASF SE, 2008). This program will only take into account the uncharged form of the molecule, whereby the approach according to Franco and Trapp (2008) assess the pH-dependency of the adsorption coefficient. This is an important consideration, due to the fact that triethylamine possess a pKa value of 10.75, indicating that the substance will almost completely exist as cation in the environment. Neutral molecules will not adsorb in such a strong intend to organic carbon in soil as their cationic counterparts. The pH dependency is shown in the following results: pH 9: logKoc = 2.56, Koc = 367, pH 7: logKoc = 2.57, Koc = 370; and at pH 5: logKoc = 2.57, Koc = 370. Lyman et al. (1982) used the substance specific octanol-water coefficient and water solubility for a regression based calculation, resulting in a Koc range of 11 to 146.
In respect of the Henry´s Law Constant for triethylamine three estimated values are available. At an ambient temperature of 25 °C a values of 0.000149 atm*m³/mol (Christie and Crisp, 1967) and 8.65 Pa*m³/mol (BASF SE, 2008) are reported. Lyman et al. (1982) calculated a constant of 0.000013 atm*m³/mol.
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