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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Adsorption / desorption

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Administrative data

Link to relevant study record(s)

Description of key information

Due to the ionic structure no adsorption onto the organic fraction of soil or sediments is expected.

The estimated log Koc for EDTA-CuNa2  is 1 (worst case, MCI method) (Zvinavashe).  

Key value for chemical safety assessment

Koc at 20 °C:

Additional information

Due to the ionic structure under environmental relevant pH conditions, no adsorption onto the organic fraction of soil or sediments is expected [EU Risk Assessment, 2004]. This are confirmed by experimental results where EDTA was almost entirely present in the form of negatively-charged complexes with alkaline earth and trace metals, and neither of these complexes nor the free or protonated ligand itself could have been significantly adsorbedon the surfaces of the solids [Gardiner, 1976]. Further on, it is confirmed due to the low log Pow of -3.86, in accordance with column 2 of REACH Annex VIII, that an Adsorption /Desorption -Screening test (required in section 9.3.1) does not need to be conducted.