EDTA Pure Acid (Ethylenediamine Tetra Acetic Acid) is a synthetic amino acid formulation, for use in tertiary flooding method of enhanced oil recovery, owing to its high pH chelating ability at low concentrations, when prepared in sea water. It
reacts with metallic cations, forming a stable rigid compound and making it easily
excretable from the application system, especially from the cores of sandstones
and carbonates. It is preferred over other chelating agents owing to its ability to form strong covalent bond with metallic ions as other inorganic contaminants may react with those metal ions, forming their own compounds.
