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Supplier Homepage > Products > HEDP 1-Hydroxy Ethylidene-1 1-Diphosphonic Acid CAS 2809-21-4
HEDP 1-Hydroxy Ethylidene-1 1-Diphosphonic Acid CAS 2809-21-4
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last update: 2023-09-17 17:07
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1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)

 

Synonyms:

 

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:

 

Properties:

 

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.

 

Specification:

 

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

 

 

Usage:

 

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

 

Package and Storage:

 

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.

 

Safety Protection:

 

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

 

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