ironIIIEDTA
Iron(III) EDTA, or iron(III) ethylenediaminetetraacetate, is the coordination complex formed between ferric ions (Fe3+) and the hexadentate ligand EDTA (ethylenediaminetetraacetic acid). In solution, EDTA is typically present as the EDTA4− anion and binds Fe3+ through its two amine nitrogens and four carboxylate oxygens, resulting in a six‑coordinate, octahedral metal center, commonly expressed as [Fe(EDTA)]−.
The Fe3+–EDTA complex is known for its high thermodynamic stability, making it a prominent reference system
Preparation and use follow classical chelation principles: Fe3+ salts are mixed with EDTA under alkaline conditions
Applications of iron(III) EDTA extend from analytical chemistry to agriculture. In fertilizers, Fe-EDTA chelates are used