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EDTA forms complexes with ions. Therefore EDTA exists naturally as a mixture of chelate complexes,for justification for read-across see IUCLID 5, Chapter 13.Some EDTA species, especially the iron complex, are photolysable. There would be no emission into the atmosphere pointing out the very low vapour pressure of the substance. Thus photodegradation in air, will not play an important role in the degradation process of EDTA in the environment.

EDTA is resistant to hydrolysis, neither strong acids nor alkalis cause any degradation. However photodegradation in natural water was observed by Metsärine (2001).