... impurity,consistent supply,competitive price 1-Hydroxyethylidene-1,1-Diphosphonic acid(HEDP)Specification:Specification:60% liquidAppearanceWhite to pale yellow liquidAcid60% minPH ... for customer's treatment process. 1-Hydroxyethylidene-1,1-Diphosphonic acid(HEDP),Reach registered, powder, liquid