Diphosphonic acid, (1-hydroxyethylidene)-,tetrasodium salt (HEDPNa4) CAS No.:3794-83-0 Molecular Formula:C2H4Na4O7P2 56% min Diphosphonic acid, (1-hydroxyethylidene)-,tetrasodium salt (HEDPNa4)CAS No.:3794-83-0Molecular Formula:C2H4Na4O7P2Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP•Na4)CAS No. 29329-71-3 (x-Na), 3794-83-0 (4-Na)Molecular Formula: C2H4O7P2Na4 Molecular weight: ...