Ethylenediaminetetraacetic Acid-d16 is the labelled version of Ethylenediamine-N,N,N’,N’-tetraacetic Acid (EDTA) (E917745(P)), which is a powerful chelating agent; EDTA forms stable complexes with most metal ions. EDTA is used in treatment of lead and heavy metal poisoning of farm animals. This compound is a contaminant of emerging concern (CECs).