EDTA

EDTA is a widely-used acronym for the chemical compound ethylenediamine tetraacetic acid (and many other names, see table). EDTA refers to the chelating agent with the formula (HO2CCH2)2NCH2CH2N(CH2CO2H)2. This amino acid is widely used to sequester di- and trivalent metal ions. EDTA binds to metals via four carboxylate and two amine groups. EDTA forms specially strong complexes with Mn(II), Cu(II), Fe(III), and Co(III).
See more at Wikipedia.org...

A polydentate ligand that tightly complexes certain metal ions. EDTA is used as a blood preservative by complexing free calcium ion (which promotes blood clotting). EDTA's ability to bind to lead ions makes it useful as an antidote for lead poisoning.

ethylenediaminetetraacetic acid

ethylenediaminetetraacetic acid, a common chelating agent used for enzyme deactivation and as a bacteriocide.

EDTA