ChEBI: Ethylenediaminetetraacetic acid is a polyamino carboxylic acid, a tetracarboxylic acid and an ethylenediamine derivative. It has a role as a chelator, an antidote and an anticoagulant. It is a conjugate acid of an EDTA(2-).NCI Thesaurus (NCIt): Edetic Acid is the acid form of edetate, a chelating agent with anti-hypercalcemic and anticoagulant properties. Edetic acid binds calcium and heavy metal ions, forming soluble stable complexes which are readily excreted by the kidneys. This results in a decrease in serum calcium levels. This agent is also used as an anticoagulant for blood specimens and is applied as a treatment of lead poisoning.