... Formula:C2H7O7P2Na2 Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid ( HEDPNa2 )CAS No.:7417-83-7Molecular Formula:C2H7O7P2Na2Disodium ... Properties:HEDP•Na2 is an organophosphonic acid corrosion inhibitor, it can chelate with Fe, Cu, and Zn ions, it can dissolve ... easy to be decomposed under normal light and heat condition, its acid/alkaline and chloride oxidation tolerance are better than that ...