Chinese alias:1-hydoxy ethyidene-1.1-diphosphonic acid English name:1-hydoxy ethyidene-1.1-diphosphonic acid CAS No.:2809-21-4 Molecular formula:C2H8O7P2 Relative molecular weight:206.02 Structural formula:
It is the scale inhibitor and corrosion inhibitor of boiler and heat exchanger, plating complexing agent without cyanogen, the detergent of metal and nonmetal, the stabilizer and fixative. Specification:
Clear, Colorless to pale yellow aqueous solution
White crystal powder
Active content (HEDP)%
Phosphorous acid (as PO33-)%
Phosphoric acid (asPO43-)%
Chloride (as Cl-) ppm
pH (1% solution)
Colour APHA (Hazen)
Acetic acid %
Ca sequestration (mg CaCO3/g)
HEDP is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven industry, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP is used as chelating agent. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic acid. Package and Storage:
HEDP liquid: 200L plastic drum,IBC(1000L),customers' requirement.
HEDP solid: 25kg/bag,customers' requirement.
Storage for ten months in room shady and dry place.