Description

Technical Parameters

HEDP

Etidronic acid is an organic phosphonic acid corrosion inhibitor, can dissociate into five positive and negative ions in the water, can chelate Divalent metal ions in the water, and iron, copper, aluminum, zinc and other metal ions forming a stable complex, has a good scale effect.

HEDP is used as a retardant in concrete, 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, It is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP is used as chelating agent. The dosage of 1–10 mg/L is preferred as scale inhibitor, 10–50 mg/L as corrosion inhibitor, and 1000–2000 mg/L as detergent. HEDP is also used together with polycarboxylic acid,in which it acts as reducing agent.

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

Introduction

Appearance:Colorless to pale yellow aqueous solution

Molecular formula: C₂H₈O₇P₂

Molecular weight: 206.03

CAS No.:2809-21-4

HS No.: 2942000000

Technical Specification

Item	Index	Index
Appearance	Colorless or light yellow transparent liquid	White,crystal,powder
Active,content(HEDP)%	58,0-62,0	89,0,min
Phosphorous,acid(as,PO₃₃-)%	2,0,max	0,5,max
Phosphoric,acid,(asPO₄₃-,)%	0,8,max	0,5,max
Chloride,(as,Cl-)%	0,01,max	0,01,max
PH(1%,solution)	2,max	2,max
Density,(20℃)g/cm³	1.40	-----
Fe,ion,ppm	10,max	20,max
Colour,APHA,(Hazen)	40,max	-----

Application

1. 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..

2. HEDP is used as detergent for metal and nonmetal in light woven industry.

3. HEDP is used as peroxide stabilizer and dye-fixing agent, dyeing industry,

4. HEDP is used as chelating agent in non-cyanide electroplating

Packing

25kg bag, 200kg/drum or according to customer request

HEDP HEDP

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