58.0-62.0% 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP) C2H8O7P2 CAS NO.2809-21-4

Chemical Name

1-Hydroxyethylidene-1,1-diphosphonic acid

Synonyms

1-Hydroxyethane-1,1-diphosphonic acid;

1-Hydroxyethylidenedi(phosphonic acid);

HEDP

Molecular Formula

C2H8O7P2

Molecular Weight

206.03

CAS No.

2809-21-4

EINECS

220-552-8

Appearance

Clear, Colorless to pale

yellow aqueous solution

White crystal powder

Active content (HEDP)

58.0-62.0%

≥ 90.0 %

Active content (HEDP·H2O)

-

≥ 98.0%

Phosphorous acid (as PO3)

≤ 1.0%

≤ 0.8%

Phosphoric acid  (asPO4)

≤ 0.6%

≤ 0.5%

Chloride (as Cl-) ppm

≤ 100.0

≤ 50.0

pH (1% solution)

≤ 2.0

≤ 2.0

Density (20degC)g/cm3

≤ 1.43-1.47

-

Fe mg/L

≤ 10.0

≤ 5.0

Color (Hazen)

≤ 30.0

-

Acetic acid

≤ 0.5%

Ca sequestration

(mg CaCO3/g)

≥ 500.0

Packing             

250kg net Plastic Drum

Application          

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.