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

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FOB,CFR,CIF

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Transportation:

Ocean

Port:

Shanghai,Qingdao

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Product Description

Product Attributes
Supply Ability & Additional Information
Packaging & Delivery

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Overview

Product Attributes

Model No.: 2809-21-4

Brand: JINAN FOREVER

Supply Ability & Additional Information

Packaging: PLASTIC DRUM

Productivity: 200,000tons per year

Transportation: Ocean

Place of Origin: CHINA

Supply Ability: 80,000tons per year

Certificate: ISO9000

HS Code: 293190

Port: Shanghai,Qingdao

Payment Type: L/C,T/T

Incoterm: FOB,CFR,CIF

Packaging & Delivery

Package Type:: PLASTIC DRUM

1-Hydroxy Ethylidene-1,1-diphosphonic acid
(HEDP)

CAS No. 2809-21-4

Molecular Formula: C₂H₈O₇P₂ Molecular weight: 206.02

Structural Formula:

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

Properties:

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. HEDPshows 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:

Items	Index
Appearance	Clear, Colorless to pale yellow aqueous solution	White crystal powder
Active content (HEDP)%	60.0 min	90.0 min
Active content (HEDP·H₂O)%	-	98.0 min
Phosphorous acid (as PO₃^3-⁾%	2.0 max	0.8 max
Phosphoric acid (as PO₄^3- )%	0.8 max	0.5 max
Chloride (as Cl^-)%	0.02 max	0.01 max
pH (1% water solution)	2.0 max	2.0 max
Density (20℃)g/cm³	1.40 min	-
Fe, mg/L	20.0 max	10.0 max
Ca sequestration (mg CaCO₃/g)	500.0 min

Usage:

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.