HEDP 1-Hydroxy Ethylidene-1 1-Diphosphonic Acid CAS 2809-21-4
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Delivery term:
The date of payment from buyers deliver within days
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Shandong
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Long-term effective
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Last update:
2023-11-19 12:07
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1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)
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Synonyms:
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HEDP;HEDP(A);HEDPA;
Etidronic Acid;
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;
Hydroxyethylidene-1,1-diphosphonicacid(HEDP);
1-Hydroxyethylidenediphosphonic Acid;
Hydroxyethylidene Diphosphonic acid(HEDP);
1-Hydroxy-1,1-Ethanediyl ester;
Oxyethylidenediphosphonic Acid(OEDP)
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CAS No. 2809-21-4
Molecular Formula: C2H8O7P2 Molecular weight: 206.02
Structural Formula:
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Properties:
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HEDP is a widely used organic phosphonic acid compound in water treatment applications.HEDP has good chemical stability under high pH value and is hard to be hydrolyzed.It is a highly effective scale ,HEDP is a popular EDTA substitute,HEDP is commonly utilized in industrial water systems, boilers, cooling towers, and other water treatment processes.
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Specification:
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Items | Index | |
Appearance | Clear, Colorless to pale yellow aqueous solution | White crystal powder |
Active content (HEDP), % | 58-62 | 90.0 min |
Active content (HEDP·H2O), % | - | 98.0 min |
Phosphorous acid (as PO33-), % | 2.0 max | 0.8 max |
Phosphoric acid (as PO43-), % | 0.8 max | 0.5 max |
Chloride (as Cl-), ppm | 100.0 max | 100.0max |
pH (1% water solution) | 2.0 max | 2.0 max |
Density (20℃), g/cm3 | 1.43-1.47 | - |
Fe, mg/L | 20.0 max | 10.0 max |
Color APHA (Hazen) | 40.0 max | - |
Ca Sequestration (mg CaCO3/g) | 500.0 min | Â |
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Usage:
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HEDP is used together with polycarboxylic acid.The solid state of HEDP is crystal powder, suitable for usage in winter and freezing districts.
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Package and Storage:
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HEDP liquid: 200L plastic drum,IBC(1000L),customers’ requirement.
HEDP solid: 25kg/bag,customers’ requirement.
Storage for twelve months in room shady and dry place.
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Safety Protection:
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Acidity, Avoid contact with eye and skin, once contacted, flush with water. 
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