... supply,competitive price 1-Hydroxyethylidene-1,1-Diphosphonic acid(HEDP)Specification:Specification:60% liquidAppearanceWhite to pale yellow liquidAcid60% minPH(1% solution)2.0 ... powderAcid90%Phosphorous acid2.5% maxPhosphoric acid0.7% maxPH(1% solution)2.0 maxChloride1.0% maxIron(Fe)35 ... for customer's treatment process. 1-Hydroxyethylidene-1,1-Diphosphonic acid(HEDP),Reach registered, powder, liquid