HS-311 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) / CAS 2809-21-4

Product name

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

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 anti-incrustation 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

Item

Details

Conform to

HG/T 3537-1999

HG/T 3537-1999

Appearance

colorless or light yellow transparent liquid

white powdered solid

Active ingredient (HEDP)%≥

60

89

Phosphorous acid（PO33-）% ≤

2

0.8

Phosphoric acid （PO43-）% ≤

0.8

0.5

Chloride （Cl-）% ≤

0.01

0.01

pH-value (1%aqueous solution) ≤

2

2

Density（20℃）g/cm3≥

1.4

——

Cacium chelating value mg/g

500

——

Iron (2+) content mg/L ≤

10

5

Active ingredient (HEDP H2O)%≥

——

98

Packing & Storage

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

Safety Protection

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