Protheragen

Disodium edetate (Disodium EDTA) is a white crystalline powder. It is used mainly as a chelating agent. It is the disodium salt of ethylenediaminetetraacetic acid. Its unique property is that it will "sequestrate" ("grab") polyvalent metal ions (ions of metals like calcium, magnesium, and iron) and hold them tightly in water-soluble complexes. It essentially "clamps" the metal ion so it cannot take part in reactions with other constituents of the mixture.