HEDP Water treatment chemical 1.One of the biggest manufacture 1.Cas 2809-21-4 2.Usage:Boiler,Cooling water,oilfield Water treatment chemical - HEDP Hydroxy Ethylidene-1,1-Diphosphonic Acid CAS No. 2809-21-4 Molecular Formula: C2H8O7P2 Molecular weight: 206.02 Properties:Specification:itemsindexAppearanceColorless or light yellow transparent liquidWhite crystal powderActive content (HEDP)%58.0-62 ...