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Environmental fate & pathways

Adsorption / desorption

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Description of key information

A Koc value of 10  L/kg is calculated for tris[(2-hydroxyethyl)ammonium] citrate.

Key value for chemical safety assessment

Koc at 20 °C:
10

Additional information

Monoethanolamine and citric acid are the starting materials for the synthesis of tris[(2-hydroxyethyl)ammonium] citrate, and the only difference is that in tris[(2-hydroxyethyl)ammonium] citrate the substances are present in their ionic forms as a monoethanolamine cation and a citrate anion. It is expected that the ecotoxicological properties of tris[(2-hydroxyethyl)ammonium] citrate shall be governed by the properties of monoethanolamine and citric acid (for more details see reporting format for the analogue approach in Appendix A.2). Therefore, the Koc is calculated for tris[(2-hydroxyethyl)ammonium] citrate as well as for monoethanolamine and citric acid with KOCWIN™ v2.00 (U. S. EPA, 2008) using the Molecular Connectivity Index (for details see QMRF and QPRF see Appendix A.3). For tris[(2-hydroxyethyl)ammonium] citrate the calculated Koc value is 10 L/kg. For monoethanolamine and citric acid the Koc values are 1.167 and 10 L/kg, respectively.