Registration Dossier
Registration Dossier
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EC number: 283-041-9 | CAS number: 84539-53-7
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Based on different types of information (calculation, sorption study and stability in the presence of soil), it is concluded EDDHMA-Fe has a low potential for adsorption.
Key value for chemical safety assessment
Additional information
Based on the calculated Koc value (Kow method, KocWIN, Mensink 2013), it was concluded that EDDHMA-Fe has a low potential for adsorption, (log Koc = - 0.32).
A non-guideline sorption study confirmed the limited adsorption for EDDHMA-Fe when considering Ca-montmorillonite, peat and ferrihydrite as soil materials (low distribution coefficients, Hernandez-Apaolaza & Lucena, 2001). In this study, the influence of concentration, pH and type of isomer was also studied and proved of relevance to the sorption behavior. Full understanding of the adsorption of metal chelates by soils will always be impeded by the complexity of soil surfaces, continuing changes in chelate speciation and concurrent degradation of the chelating ligand.
Additionally, a stability study in water solution at different pH's and in the presence of three different suspended soils showed the stability of EDDHMA-Fe by measurement of Fe concentrations in solution (Bar-Yosef, 1985).
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