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HEDP / HEDPA / 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid / Etidronic Acid
CAS NO.: 2809-21-4
FOB Price: NEGOTIABLE Get Latest Price
Specification: 58.0%-62.0%; ≥90%
Documentation:
Lead Time: In Stock
Max Capacity: -
Pallets Packing 20'FCL 40'FCL
With Without With Without
1250KG/IBC Drum
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22.5 MT
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25KG/Woven Bag
19 MT
25 MT
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Product Detail
Properties

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


Basic information of HEDP

CAS No. 2809-21-4

Molecular Formula: C2H8O7P2

Molecular weight: 206.02

Structural Formula:

Properties of HEDP

HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn ions to form stable chelating compounds.It can dissolve the oxidized materials on these metals’ surfaces. HEDP shows excellent scale and corrosion inhibition effects under temperature 250℃. HEDP has good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. Its acid/alkali and chlorine oxidation tolerance are better than that of other organophosphoric acids (salt). HEDP can react with metal ions in water system to form hexa-element chelating complex, with calcium ion in particular. Therefore, HEDP has good antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects.

The solid state of HEDP is crystal powder, suitable for usage in winter and freezing districts. Because of its high purity, it can be used as cleaning agent in electronic fields and as additives in daily chemicals.


Specification of HEDP

Items

Index

Appearance

Colorless or light yellow transparent liquid

White crystal powder

Active content(HEDP)%

58.0-62.0

90.0min

Phosphorous acid(as PO33-)%

2.0max

0.5max

Phosphoric acid (asPO43)%

0.8max

0.5max

Chloride (as Cl-)%

0.01max

0.01max

pH(1% solution)

2max

2max

Density (20℃)g/cm3

1.40

Fe ion ppm

10max

20max

Colour APHA (Hazen)

40max


Usage of HEDP

HEDP is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc. In light woven industry, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP is used as chelating agent. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic acid.


Package and Storage of HEDP

HEDP liquid: Normally In 250kg net Plastic Drum, IBC drum can also be used as required

HEDP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag,, or confirmed by clients.

Storage for ten months in room shady and dry place.


Safety Protection of HEDP

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


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27YRS
Business Type:
Manufacturing
Country/Region:
Jiangsu, China
Contacts:
Mr. Yin
Position Title:
Sales Manager
Tel:
0086-519-88733208
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