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CAS 2809-21-4 1-Hydroxy Ethylidene-1 1-Diphosphonic Acid

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CAS 2809-21-4 1-Hydroxy Ethylidene-1 1-Diphosphonic Acid

CAS 2809-21-4 1-Hydroxy Ethylidene-1 1-Diphosphonic Acid
CAS 2809-21-4 1-Hydroxy Ethylidene-1 1-Diphosphonic Acid

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Product Details:
Place of Origin: CHINA
Brand Name: SUNNY
Certification: NO
Model Number: See the Specification
Payment & Shipping Terms:
Minimum Order Quantity: 1MT
Price: Negotiation according to your requirement's time.
Packaging Details: According to your requirements.
Payment Terms: D/P, L/C, T/T
Supply Ability: 1000MT
Detailed Product Description
CAS No.:: CAS 2809-21-4 Other Name:: HEDP
MF:: C2H8O7P2 Type:: Agrochemical Intermediates, Dyestuff Intermediates, Flavor & Fragrance Intermediates, Pharmaceutical Intermediates, Syntheses Material Intermediates
Purity:: 90.0% Min Appearance:: Clear, Colorless To Pale Yellow Aqueous Solution
High Light:

CAS 2809-21-4 1-Hydroxy Ethylidene-1

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CAS 2809-21-4 1-Diphosphonic Acid

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90.0% 1-Diphosphonic Acid

Chemicals name:1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)

CAS No. 2809-21-4

Other name:HEDPA

Molecular Formula: C2H8O7P2 Molecular weight: 206.02
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. 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.

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.
Applicant:

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.
Package and Storage:

HEDP liquid: Normally In 250kg net Plastic Drum, IBC drum can also be used as required

HEDP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients.
Storage for ten months in room shady and dry place.

Safety Protection:

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


Specification:

items index
Appearance Clear, Colorless to pale yellow aqueous solution White crystal powder
Active content (HEDP)% 58.0-62.0 90.0min
Phosphorous acid (as PO33-)% 1.0 max 0.8 max
Phosphoric acid (asPO43- )% 0.6 max 0.5 max
Chloride (as Cl-) ppm 100.0 max 100.0max
pH (1% solution) 2.0 max 2.0 max
Density (20℃)g/cm3 1.43-1.47 -
Fe,mg/L 10.0 max 5.0 max
Acetic acid % 0.5 max  
Ca sequestration (mg CaCO3/g) 500.0 min  
 

 

 

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