HS-311 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)

Molecular Formula: C2H8O7P2
CAS No.:  2809-21-4
Alias: HEDPA 
Molecular Formula: C2H8O7P2
Molecular Weight: 206.02
Structural Formula:

Properties & Use
It is an organic phosphoric acid series antiincrustation corrosion inhibitor. It has good stability in high pH-value conditions; has good resistance to acids/alkali and oxidation. 
HEDP is widely used for electrical power, chemical engineering, metallurgy and chemical fertilizer industries. 
Specifications   Conform to HG/T 3537-1999

Item

Details

HG/T 3537-1999

 

Appearance

colorless or light yellow transparent liquid

white powdered solid

Active ingredient (HEDP)%≥

50.0       60.0

89.0

Phosphorous acid (PO33-)%≤

2.0        2.0

0.80

Phosphoric acid (PO43-)%≤

0.8        0.8

0.50

Chloride (Cl-)%≤

0.01        0.01

0.01

pH-value (1%aqueous solution) ≤

2          2

2.0

Density (20℃) g/cm3

1.34       1.40

——

Cacium chelating value mg/g

450        500

——

Iron (2+) content mg/L ≤

10         10

5.0

Active ingredient (HEDP H2O)%≥

——

98.0

Packing & Storage
HEDP liquid: in plastic drum, 30kg/drum or 250Kg; HEDP solid: in plastic woven bag lined with PE film, net wt.25kg/bag, or upon users' demand. Stored in cool and draugthty place. Shelf life is 12 months.

Safety Protection
Avoid contact with skin and eyes; wash with plenty of water.

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