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Environmental fate & pathways

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EDTA (acid form) and its salts are not readily biodegradable according to OECD criteria, for justification for read-across see IUCLID 5, Chapter 13. It was shown that under special conditions like adaptation or slightly alkaline pH, which is realistic under environmental surface water conditions, the biodegradability of EDTA is considerable enhanced. Exchange between metal ions will transform less biodegradable into (well)biodegradable complex species. Therefore all metal-EDTA complexes are to be considered inherently and ultimately degradable and not persistent, but not readily biodegradable.