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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
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