Tris(2-hydroxyethyl)ammonium acetate

Endpoint summary

Additional information

Triethanol amineacetate (TEA acetate, EC No: 238-874-2) is the manufacturing product of the mixture between triethanolamine and acetic acid. Its purity varies depending on the purity of the raw materials, resulting in a product with a composition of 80% or more of TEA acetate and up to 20% of other alkanolamine salts, including primarily Diethanol amineacetate (DEA acetate, EC number: 245 -524 -2) as the main impurity. In support of this dossier, physico-chemical properties from DEA acetate have been included. From the physico-chemical data acquired, it can be concluded that TEA acetate and DEA acetate are similar substances. They both have low vapour pressure and high water solubility. Both the density and surface tension values are very close for these two substances and they both decompose before boiling at 125ºC for TEA acetate and 150ºC for DEA acetate. In addition, supporting data from structurally-similar read across substances RA2 and RA1 is used. The partition coefficient, water solubility and surface tension have proven to be similar for all four of these substances.

TEA acetate is a pale yellow solid organic salt with a relatively low melting point and a moderate density. The vapour pressure is very low (0.116 Pa at 20ºC) and the water solubility is above 1000 g/L. The substance has a low Log Kow (<-1.31). These properties are of great importance in assessing whether the substance has dangerous effects to the environment, and are very similar to those shown by the main impurity (DEA acetate) and the structural-analogues RA1 and RA2. These properties indicate on a general level that TEA acetate is not hazardous for the environment. Other properties of TEA acetate such as flammability, explosiveness, oxidizing potential, stability and flash point further indicate that the substance is not likely to present a human hazard.