CAS 2809-21-4 Water Treatment Chemical Scale Inhibitor Liquid 60% 90% Etidronic Acid HEDP

Product Description

Product Description

Hydroxyethyl diphosphonic acid(Etidronic acid) is an organic compound, the solid is white crystalline particles, the dissolved water is colorless to light yellow liquid. This product is soluble in water, soluble in methanol and ethanol. It has a large dissociation constant in water and can form stable complexes with metal ions. It can form stable adducts with compounds containing active oxygen to keep active oxygen stable.
CAS No.: 2809-21-4                                   
EINECS No.: 220-552-8
Molecular Formula: C2H8O7P2                
Molecular Weight: 206.02
RIDADR: UN 3265 8/PG III

Specification

Specification of HEDP :

 

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 PO33-)%	1.0 max	0.8 max
Phosphoric acid (as PO43- )%	0.6 max	0.5 max
Chloride (as Cl-)%	0.01 max	0.01 max
pH (1% water solution)	2.0 max	2.0 max
Density (20ºC)g/cm3	1.40 min	-
Fe, mg/L	10.0 max	5.0 max
Colour APHA (Hazen)	10.0 max	-
Ca sequestration (mg CaCO3/g)	500.0 min	-

 

Application

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.

 

Packaging & Shipping

HEDP Liquid: Normally in 200L HDPE drum, 1000L IBC, or customers' requirement.
HEDP Solid: 25kg inner liner PE bag, 1000kg woven bag, or customers' requirement.
Storage for ten months in room shady and dry place.

Company Profile