Ethylenediaminediacetic acid (EDDA) is the organic compound with the formula C 2 H 4 (NHCH 2 CO 2 H) 2. It is a derivative of two molecules of glycine, wherein the amines are linked. It is a white solid. The conjugate base is a tetradentate ligand. A representative complex is Na [Co (EDDA) (CO 3)].

Ethylenediaminediacetic acid is an ethylenediamine derivative in which two of the four amine protons of ethylenediamine are replaced by carboxymethyl groups. It has a role as a chelator and a bacterial xenobiotic metabolite. It is an ethylenediamine derivative, a glycine derivative, a polyamino carboxylic acid and an amino dicarboxylic acid.