EDTA chelating agents are the workhorses of our chelating agent line. These ethylenediaminetetraacetic acid products include VERSENE™ 100, a general purpose chelant that is widely used to control common multivalent metal ions to pH 12, iron t pH 8, and water hardness ions above pH 4. Other products in this series make the basic EDTA chemistry available in diammonium, tetraammonium, disodium, and acid forms. Physical forms include liquids, and crystal forms. VERSENE™ Disodium NA and VERSENE™ CA Chelating Agents are food and pharmaceutical grade products.