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

1.HEDP/ Hydroxy Ethylidene-1,1-Diphosphonic Acid 2.CAS No. 2809-21-4 3. Water treatment chemicals

Hydroxy Ethylidene-1,1-Diphosphonic Acid  (HEDP) -water treatment chemical

 

CAS No. 2809-21-4

Molecular Formula: C2H8O7P2 Molecular weight: 206.02

Structural Formula:

 

Usage:

HEDP is widely used in electric power, chemical industry, metallurgy, fertilizers, low pressure boilers, industrial circulating water system and oilfield water injection and oil pipeline and salt and molybdate and zinc as well as copolymer compound used, main role inhibition and inhibition. In addition, they can also be used as a cyanide-free electroplating complexing agents, detergent for surface treatment of metals and non-metals, hydrogen peroxide stabilizer, metal ion masking agents, and so on. 

 

Technological specification:

Standard HG/T3537-1999

Appearance	Clear, Colorless to pale yellow aqueous solution	Clear, Colorless to pale yellow aqueous solution	White crystal powder
Active content (HEDP)%≥	50.0	60.0	90.0
Phosphorous acid (as PO33-)%)≤	2.0	2.0	0.80
Phosphoric acid (asPO43- )% ≤	0.8	0.8	0.50
Chloride (as Cl-)% ≤	0.01	0.01	0.10
pH (1% solution) ≤	2.0	2.0	2.0
Density (20°C)g/cm3 ≥	1.34	1.40	——
Chelating value mg/g	450	500
Fe2+,mg/L≤	10.0	10.0	5.0
Active content(HEDP·H2O)% ≤	——	——	98.0

 

Package and Storage:

HEDP liquid: 200L plastic drum,IBC(1000L),customers’ requirement.

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

Storage for twelve months in room shady and dry place.

 

Safety Protection:

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

 

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