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1-Hydroxyethylidene-1,1-Diphosphonic Acid（HEDP）

Properties: HEDP is colorless or light yellow transparent liquid. It has good chemical stability, and shows excellent scale and corrosion inhibition effects under temperature 200. HEDP has good oxygen resistance, low toxicity and no pollution. It can form stable complex with many kinds of metal ions.

Usage: Widely used for water treatment scale and corrosion in all kinds of industries, and is used as a metal cleaning agent and complexing agent in the industry.

Technical Indicators: Meet the requirements of HG/T 3537-1999

Items                                                         Index

appearance                                colorless or light yellow transparent liquid

active component content (HEDP)%                 ≥50

phosphorous acid（as PO33）％                ≤2.0

phosphoric acid（as PO43-）％                 ≤0.8

chloride（as CI-）％                                       ≤1.0

PH (1% solution)                                              ≤2.0

density (25℃)g/cm3                                     1.34-1.48

Ca chelating value   mg/g           ≥450

Fe    mg/L                          ≤10

Method of Use: In industrial chilled water system, the general dosage is 5-10ppm.

Packing and Storage: Plastic barrel packing, 30kg or 250kg per barrel. It should be stored in a shady place indoors, and the storage period is one year.