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

 

 

HEDP;HEDP(A);HEDPA;

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)

 

CAS No. 2809-21-4

Molecular Formula: C₂H₈O₇P₂ Molecular weight: 206.02

Structural Formula:

 

 

HEDP is a widely used organic phosphonic acid compound in water treatment applications.HEDP has good chemical stability under high pH value and is hard to be hydrolyzed.It is a highly effective scale ，HEDP is a popular EDTA substitute，HEDP is commonly utilized in industrial water systems, boilers, cooling towers, and other water treatment processes.

 

 

Items	Index
Appearance	Clear, Colorless to pale yellow aqueous solution	White crystal powder
Active content (HEDP), %	58-62	90.0 min
Active content (HEDP·H2O), %	-	98.0 min
Phosphorous acid (as PO33-), %	2.0 max	0.8 max
Phosphoric acid (as PO43-), %	0.8 max	0.5 max
Chloride (as Cl-), ppm	100.0 max	100.0max
pH (1% water solution)	2.0 max	2.0 max
Density (20℃), g/cm3	1.43-1.47	-
Fe, mg/L	20.0 max	10.0 max
Color APHA (Hazen)	40.0 max	-
Ca Sequestration (mg CaCO3/g)	500.0 min	Â

 

 

HEDP is used together with polycarboxylic acid.The solid state of HEDP is crystal powder, suitable for usage in winter and freezing districts.

 

 

HEDP liquid: 200L plastic drum,IBC(1000L),customers’ requirement.

HEDP solid: 25kg/bag,customers’ requirement.

Storage for twelve months in room shady and dry place.

 

 

Acidity, Avoid contact with eye and skin, once contacted, flush with water.　

 

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