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Colorless or light yellow liquid, miscible with water, still stable at high and low pH.
Properties
| Odor | Odorless |
|---|---|
| Solubility Information | Solubility in water |
| Melting Point | 198~199℃ |
| FlashPoint | 303.8°C |
| BoilingPoint | 578.8±60.0 °C(Predicted) |
| VaporPressure | 0Pa at 25℃ |
| Stability | Stablize. Incompatible with strong oxidizing agents. |
Applications
HEDP is a kind of organic phosphonic acid scale inhibitor and corrosion inhibitor, which can form stable complexes with iron, copper, zinc and other metal ions, and can dissolve oxides on the metal surface. It can still play a good corrosion and scale inhibition effect at 250℃, and is still very stable at high pH, not easy to hydrolysis, and not easy to decompose under general photothermal conditions. Acid and alkali resistance, chlorine oxidation resistance is better than other organic phosphonic acid (salt).
Structural Identifiers
| Linear Formula | C2H8O7P2 |
|---|---|
| CASNo. | 2809-21-4 |
| MDL Number | MFCD00070585 |
| EINECS No. | 220-552-8 |
| Beilstein/Reaxys No. | N/A |
| Pubchem CID | 3305 |
| IUPAC Name | (1-hydroxy-1-phosphonoethyl)phosphonic acid |
| SMILES | CC(O)(P(=O)(O)O)P(=O)(O)O |
| InChI Identifier | InChI=1/C2H8O7P2/c1-2(3,10(4,5)6)11(7,8)9/h3H,1H3,(H2,4,5,6)(H2,7,8,9)/p-4 |
| InChI Key | DBVJJBKOTRCVKF-UHFFFAOYSA-N |
| ChEBI | 4907 |
| UN NO. | UN3265 |
| HEDPSynonyms: | Etidronic Acid, Etidronate, Hedp, 1-Hydroxyethylidene-1,1-Diphosphonic Acid, EHDP, Etidronsaeure, Acetodiphosphonic Acid, Hydroxyethanediphosphonic Acid, Oxyethylidenediphosphonic Acid, Turpinal sl |
| Grades | Industrial Grade |
| Groups | Water Treatment & Pool Chemicals, Antioxidants, Chelants, Dyes |
| MARKETS | Water Treatment |
Technical specification
Available in liquid and powderLiquid: HEDP 60%Powder: HEDP 98%
| Items | Unit | Lower Limit | Upper Limit | |
|---|---|---|---|---|
| Appearance | Clear colorless to pale yellow liquid, | |||
| Active acid | % | 60.0 | ||
| Phosphorous acid as PO33- | % | 1.0 | ||
| Phosphoric acid as PO43- | % | 0.6 | ||
| Chloride (as Cl-) | ppm | 100.0 | ||
| CaSequestrant | mg CaCO3/g | 500 | ||
| pH (1% solution) | 2.0 | |||
| Density 20℃ | g/cm3 | 1.4 | ||
| Iron as Fe | ppm | 10.0 | ||
| Color | Hazen | 30.0 | ||
| Items | Unit | Lower Limit | Upper Limit | |
|---|---|---|---|---|
| Appearance | White crystal powder | |||
| Active content as acid | % | 90.0 | ||
| Active content(as HEDP·H2O) | % | 98.0 | ||
| Phosphorous acid as PO33- | % | 0.8 | ||
| Phosphoric acid as PO43- | % | 0.5 | ||
| Chloride (as Cl-) | % | 0.01 | ||
| pH (1% solution) | 2.0 | |||
| Fe | mg/L | 10.0 | ||
Packaging
Liquid: 250kg drum, 1250kg IBC TANK,1400kg IBC TANK
Powder: 25KG BAG
Illustrated packaging: Plastic drums. Confirm the shipment packaging with the quotation.
Illustrated packaging: Bags. Confirm the shipment packaging with the quotation.
Illustrated packaging: IBC tanks. Confirm the shipment packaging with the quotation.
On a small screen, scroll the technical table horizontally.
Published reference specifications. Confirm the current grade, SDS / TDS / COA, packaging and delivery terms with your quotation.