... ions in water system to form hexa-element chelating complex, with calcium ion in particular. Therefore, HEDP has good antiscale ... and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects. ... /L as detergent. Usually, HEDP is used together with polycarboxylic acid.Package and Storage:HEDP liquid: 200L plastic drum,IBC(1000L ...