Get reasonable HEDP price quote (60% liquid & 98% powder) CAS 2809-21-4 from TNJ Chemical, top China HEDP suppliers, factory & manufacturers. We guarantee good price of HEDP 60% 98% with high quality. If you want to buy HEDP 60% 98%, please feel free to contact sales@tnjchem.com

Etidronic acid HEDP CAS 2809-21-4, also called 1-Hydroxyethylidene-1,1-diphosphonic acid, 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.

Specification of HEDP

HEDP 58%-62% liquid

Appearance                                      Colorless to pale yellow aqueous solution

Active content (HEDP)%                    58.0-62.0

Phosphorous acid (as PO33-)%          1.0 max

Phosphoric acid (asPO43- )%             0.6 max

pH (1% solution)                              2.0 max 

Density g/cm3                                  1.43-1.47

Fe,mg/L                                           10.0 max

Colour APHA (Hazen)                        30.0 max

HEDP 98% solid

Appearance                                     White crystal powder

Active content(HEDP)%                    90.0 min

Active content (HEDP H2O)%            98.0 min

Phosphorous acid (as PO33-)%         0.8 max

Phosphoric acid  (asPO43- )%           0.5 max

Chloride (as Cl-) ppm                       100.0max

pH (1% solution)                             2.0 max

Fe,mg/L                                          5.0 max

Application of HEDP

HEDP is used as scale and corrosion inhibition in circulating cool water system, oil field and low pressure boilers in fields 

3) HEDP is usually used together with polycarboxylic acid.

4) HEDP is listed as an ingredient of several cosmetic formulations where it is used for suppressing radical 

formation, emulsion stabiliser and viscosity control.

Packing

Solid:  25kg per bag,25mt per 20ft container

Liquid: 250kg per drum,80drums per 20ft container

Storage & Transport

Stored in cool and airy place; away from fire and heat; handle with care; no breakage, avoid leakage.

It is valid for 1 years under proper condition.

HEDP is classified as Dangerous Good for transport (UN 3261,Class 8,Packing group III)

Please refer to MSDS for more information about Safety,Storage and Transportation.