... -Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP.Kx) CAS No.:67953-76-8 Molecular Formula:C2H8O7P2 ... -Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP.Kx)CAS No.:67953-76-8Molecular Formula:C2H8O7P2·xKPotassium ... 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP•Kx)CAS No. 67953-76-8Molecular Formula: C2H8- ... that of sodium salt under neutral condition. HEDP•Kx is a good scale inhibitor for calcium carbonate ...