1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)
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Post Date:
Dec 20,2023
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Expiry Date:
Dec 19,2024
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Detailed Description:
Cas No. :2809-21-4
Quantity: 24FCL
Specs:60%, 90%
Price:900 USD Metric Tons
Payment Method: TT,LC
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
(HEDP)
CAS No. 2809-21-4 Molecular Formula: C2H8O7P2
Molecular weight: 206.02
Structural Formula
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. It shows excellent scale and corrosion inhibition effects under temperature 250ºC.
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, it has good antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects.
Solid HEDP is crystal powder, suitable for usage in winter and freezing districts. Due to its high purity, it can be used as cleaning agent in electronic fields and as additives in daily chemicals. "
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 (as PO43- ) % 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
Colour APHA (Hazen) 30.0 max -
Acetic acid % 0.5 max
Ca sequestration (mg CaCO3/g ) 500.0 min
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CAS Registry Number:
2809-21-4
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Synonyms:
;1-Hydroxyethane-1,1-diphosphonic Acid;Etidronic acid;HEDP;HEDPA;
Hydroxy Ethylidene-1,1-Diphosphonic Acid;1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;1-Hydroxyethylidene diphosphonic Acid;1-hydroxy ethylene-1,1-diphosphonic acid;1-HYDROXYETHYLIDENEDI(PHOSPHONIC ACID);disodium (1-hydroxyethane-1,1-diyl)bis[hydrogen(phosphonate)];(1-hydroxyethane-1,1-diyl)bis(phosphonate);Hydroxyethylidenedi(phosphonic acid);Hydroxyethylidine Diphosphonic Acid;HydroxyEthylidene Diphosphonic acid;
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Molecular Formula:
C2H8O7P2
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Molecular Weight:
201.9987
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Molecular Structure:
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