... ,cleaners,complexant 4. Best price 1.Product :Product name:Water treatment chemicals HEDP,1-Hydroxy Ethylidene-1,1-Diphosphonic Acid ... good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat ... antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects. The solid ...