Main Products
- Polycarboxylic antiscalant and dispersant
- Eco-friendly antiscalant and dispersant
- Phosphonates Antiscalants, Corrosion Inhibitors and Chelating Agents
- Salts of Phosphonates
- Tetra sodium salt of Amino Trimethylene Phosphonic Acid (ATMP•Na4)
- Penta sodium salt of Amino Trimethylene Phosphonic Acid (ATMP•Na5)
- Potassium salt of Amino Trimethylene Phosphonic Acid (ATMP•Kx)
- Mono-sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP•Na)
- Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP•Na2)
- Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP•Na4)
- Potassium salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP•Kx)
- Ethylene Diamine Tetra (Methylene Phosphonic Acid) Pentasodium Salt (EDTMP•Na5)
- Hepta sodium salt of Diethylene Triamine Penta (Methylene Phosphonic Acid) (DTPMP•Na7)
- Sodium salt of Diethylene Triamine Penta (Methylene Phosphonic Acid) (DTPMP•Nax)
- 2-Phosphonobutane -1,2,4-Tricarboxylic Acid, Sodium salt (PBTCA•Na4)
- Potassium Salt of HexaMethylene-DiamineTetra (MethylenePhosphonic Acid) HMDTMPA•K6
- Partially neutralized sodium salt of bis hexamethylene triamine penta (methylene phosphonic acid) BHMTPH•PN(Nax)
- Biocide and Algicide
- Built Scale & Corrosion Inhibitorsand Pretreatment Filming Agents
- Corrosion Inhibitor
- Oxygen Scavenger
- Reverse Osmosis Chemicals
- Other
Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic
Acid (HEDP•Na2)
CAS No. 7417-83-7
Molecular Formula: C2H6O7P2Na2 Molecular weight: 250
Structural Formula:
Properties:
Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is an organophosphonic acid corrosion inhibitor, it can chelate with Fe, Cu, and Zn ions, it can dissolve the oxidized materials, it has good scale and corrosion inhibition effects even under 250℃, Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is stable under high pH value, not easy to be hydrolyzed, not easy to be decomposed under normal light and heat condition, its acid/alkaline and chloride oxidation tolerance are better than that of other organophosph-onic acids. Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid can form six-ring chelating compounds with metal ions in water system, Ca2+ in particular. Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid has good scale inhibition effects and obvious dissolution threshold effects. When used with other Water Treatment Chemicals, the synergistic effects is better.
Specification:
| Items | Index | |
|---|---|---|
| Appearance | Colorless to light yellow transparent liquid | White powder |
| Active component (HEDP)% | 16.5 min | 74.0-79.0 |
| Active component (HEDP•Na2)% | 20.0 min | 89.8 min |
| density (20℃)g/cm3 | 1.12-1.22 | -- |
| Fe，mg/L | -- | 35 max |
| Phosphorous acid (as PO33-)% | -- | 3 max |
| Dry weight loss % | -- | 3.0-6.0 |
| PH (1% water solution) | 4.0-6.0 | 4.0-6.0 |
Usage:
Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is widely used in circulating cool water system, medium and low pressure boiler, oil field water pipelines as scale and corrosion inhibitor in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven industry, Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is used as detergent for metal and nonmetal. In dyeing industry, Disodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP•Na2 is used as chelating agent.
Package and Storage:
For liquid: Normally In 250kg net Plastic Drum, IBC drum can also be used as required. Storage for ten months in room shady and dry place.
For solid: 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:
Weak acidity, Avoid contact with eye and skin, once contacted, flush with water.