1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)
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1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)

Item No.: CAS NO.2809-21-4 
HEDP (dequest 2010)  is mainly used as a Scale & Corrosion Inhibitor, chelating (Sequestrating), deflocculating agent in Cooling and Boiler water treatment, Textile Dying, Detergents etc.
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Description Dangerous description
                                          1-Hydroxy Ethylidene-1,1-Diphosphonic Acid ,HEDP 
                             


1. Product name: 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid , Deuest 2010 Abbr:  HEDP,HEDP(A);HEDPA;
   Synonyms:
           Etidronic Acid;
           1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;
           Hydroxyethylidene-1,1-diphosphonicacid(HEDP);
           1-Hydroxyethylidenediphosphonic Acid;
           Hydroxyethylidene Diphosphonic acid(HEDP);
           1-Hydroxy-1,1-Ethanediyl ester;
           Oxyethylidenediphosphonic Acid(OEDP)
         Оксиэтилидендифосфоновая кислота(ОЭДФ -кислота )

2.Molecular weight: 206.02
   Molecular Formula: C2H8O7P2 
3.CAS NO.  2809-21-4 
4.Specification:
 
   
Item Index
Appearance Clear, colorless to pale yellow aqueous solution White crystale powder
 
Active Content 58.0% - 62.0% 89%
Phosphorous acid (as PO33-) 2.0% max. 2.5max
Phosphoric acid (as PO43-) 0.8% max. 0.7%max
pH (1% water solution) 2.0 max. 2.0max
Chlorides(as Cl-) 100ppm max. 100ppm max
Density (20oC) g/cm3 1.34-1.40 1.447
Iron 10.0ppm max. 35ppm max
Color (APHA) 30 max.  

5.Usage:

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. 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.
6.package and Storage: Packed  250kg/drum or 1300kg/ibc 

 
UN NO.:3265    Class: 8

Dangerour Mark:

Security ID:S26 S39

Hazard Identification:R41 R37/38

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