Water treatment chemical HEDP

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)   [CAS] 2809-21-4    Molecular Formula:C2H8O7P2                                                  Molecular weight: 206.02    1, Properties HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn etc. metal ions and form stable complex compound. It can dissolve the oxidized materials on these metals’ surfaces. Under  250℃ HEDP shows excellent scale and corrosion inhibition ability. HEDP has good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. Its acid/alkali and chlorine oxidation tolerance are better than that of other organophosphoric acids (salt). HEDP can react with metal 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.  The solid of HEDP is high purity product, suitable for using in winter and freezing districts. it is quite suitable for using as cleaning agent in electronic fields and as additives in daily chemicals.     2, Specification:

Items	Index
Appearance	Colorless or light yellow  transparent liquid	White crystal powder
Active content (as HEDP) % ≥	50.0        60.0	90.0
Phosphorous acid (as PO33-)%≤	2.0          2.0	0.80
Phosphoric acid  (asPO43- )% ≤	0.8          0.8	0.50
Chloride (as Cl-)% ≤	1.0          1.0	0.10
pH (1% solution) ≤	2             2	1.5-2.0
Density  (20℃)g/cm3 ≥	1.34        1.40	——
Fe ion ppm   ≤	10           10	5.0

  3,HEDP Application range&using method HEDP is widely used in the in circulating cool water system of electric power, chemical industry, metallurgy, fertilizer, etc. and widely used as a scale and corrosion inhibitor of low-pressure boilers, field waterflood, oil pipeline. In light&textile 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.    4, Package and Storage: HEDP liquid: Normally In 30kg or 250kg net Plastic Drum;HEDP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients request.Storage for ten months in room shady and dry place.    5,Safety Protection: HEDP is Acidity, Avoid contact with eye and skin, once contacted, flush with water.     Company Information JIANGYIN LANYU CHEMICAL CO., LTD 1. Establishment: Founded in 1993.  2. Main product: New catalysts and Water Treatment Chemical, especially corrosion inhibitor and  phase transfer catalysts (PTC). 3. Location: Headquartered in Jiangyin city, Jiangsu with several production bases. Our factory nears from Shanghai, about 1hour by train. Also there is a air port in our city, you can fly directly to our city. 4. Technology:   Establishes PTC and Water Treatment angent processing, synthesis and pilot workshops, analysis and application labs, makes long-term exchange and cooperation with scientific research institutions including Zhejiang University, and keeps a leading position in the field of technology.  PEOPLE ORIENTED IN THE BUSINESSPEOPLE FIRST IN THE DEVELOPMENT    TECHNICAL RESERCH AND DEVELOPMENT    ADVANCED EQUPMENTS THE QUALITY GUARANTEE     IOS CERTIFICATION   Our Services About the sample shippment   About the paym  Our Market EXERT OURSELF TO WIN THE MARKET   HEDP   HEDP   HEDP   HEDP   HEDP   HEDP   HEDP    HEDP   HEDP   HEDP   HEDP   HEDP   HEDP   HEDP  HEDP   HEDP   HEDP   HEDP   HEDP   HEDP   HEDP   HEDP   HEDP    HEDP   HEDP   HEDP   HEDP   HEDP   HEDP   HEDP  HEDP   HEDP

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Product Categories : Organic Phosphonic Acid