Product Details
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)
Â
Synonyms:
Â
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)
Â
CAS No. 2809-21-4
Molecular Formula: C2H8O7P2 Molecular weight: 206.02
Structural Formula:
Â
Properties:
Â
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.
Â
Specification:
Â
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
|
Â
Usage:
Â
HEDP is used together with polycarboxylic acid.The solid state of HEDP is crystal powder, suitable for usage in winter and freezing districts.
Â
Package and Storage:
Â
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.
Â
Safety Protection:
Â
Acidity, Avoid contact with eye and skin, once contacted, flush with water. 
Â
http://www.yingxinwater.com/