HEDP.Na is an organophosphonic acid corrosion inhibitor, it can chelate with Fe, Cu, and Zn ions. CAS No. 29329-71-3 Dequest: 2016AMolecular Formula: C2H7O7P2Na Molecular weight: 228Structural Formula: Properties:HEDP·Na is an organophosphonic acid corrosion inhibitor, it can chelate with Fe, Cu, and Zn ions. HEDP·Na can dissolve the oxidized materials, it has good scale and corrosion inhibition ...