VERSENE™ 100 Chelant
VERSENE™ 100 Chelating Agent is an aqueous solution of the tetrasodium salt of ethylenediaminetetraacetic acid. Na4EDTA is the strongest, most versatile, and widely used chelant for controlling metal ions over a broad pH range in aqueous systems. It will not chelate monovalent metal ions such as sodium or potassium, but will chelate most multivalent metal ions (e.g., Fe, Cu, Mn, Ca, Mg, Zn) in a 1:1 molar ratio. The chelation reaction is virtually instantaneous in most cases. Calcium and other alkaline earth metals are most effectively chelated above pH 4. Na4EDTA chelates most transition metals below pH 12. VERSENE™ 100 is completely miscible with water, but is not soluble in organic systems. Na4EDTA is stable under widely varying conditions of temperature, acidity, alkalinity, and the presence of other chemicals. Na4EDTA is attacked, however, by strong oxidizing agents such as hypochlorite bleach. In some applications, Na4EDTA can be reclaimed for reuse.