... Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP.Kx) CAS No.:67953-76-8 Molecular Formula:C2H8O7P2.xK Potassium salt of 1-Hydroxy Ethylidene ... -1,1-Diphosphonic Acid (HEDP.Kx)CAS No.:67953-76 ... C2H8O7P2·xK Diphosphonic Acid (HEDP•Kx) CAS No. 67953-76-8Molecular Formula: C2H8-xO7P2Kx HEDP•Kx is the potassium salt of HEDP, HEDP ...