Main Products
- Phosphonates Antiscalants, Corrosion
Inhibitors and Chelating Agents - Salts of Phosphonates
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- Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP?Na4)
- Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP?Na4)
- 2-Phosphonobutane -1,2,4-Tricarboxylic Acid, Sodium salt (PBTC?Na4)
- Penta sodium salt of Amino Trimethylene Phosphonic Acid (ATMP?Na5)
- Hepta sodium salt of Diethylene Triamine Penta (Methylene Phosphonic Acid) (DTPMP?Na7)
- Potassium Salt of HexaMethylene-DiamineTetra (MethylenePhosphonic Acid) HMDTMPA?K6
- More
- Polycarboxylic antiscalant and dispersant
- Biodegradable antiscalant and dispersant
- Biocide and Algicide
- Built Scale & Corrosion Inhibitors and Pretreatment Filming Agents
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- TH-907 Non-P Scale&Corrosion Inhibitor
- TH-503 Scale and Corrosion Inhibitor for Boiler
- TH-503B Scale and Corrosion Inhibitor for Boiler
- TH-504 Scale and Corrosion Inhibitor for Heating Water
- TH-601 Scale and Corrosion Inhibitor for Iron & Steel Plant
- TH-604 Scale and Corrosion Inhibitor for Power Plant
- More
- Corrosion Inhibitor
- Oxygen Scavenger
- Reverse Osmosis Chemicals
- Other
Shandong Taihe Technologies Co., Ltd.
TEL: +86-632-5113066
FAX: +86-632-5112055
E-mail: info@thwater.net
ADD: No.1, Shiliquan East Road, Shizhong District, Zaozhuang City, Shandong Province, P.R.China
Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP?Na2)
CAS No. 7414-83-7
Molecular Formula: C2H6O7P2Na2 Molecular weight: 250
Structural Formula:
Properties:
HEDP?Na2 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℃, it 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. HEDP?Na2 can form six-ring chelating compounds with metal ions in water system, Ca2+ in particular. HEDP?Na2 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 content (HEDP) % | 16.5 min | 74.0-79.0 |
| Active content (HEDP?Na2) % | 20.0 min | 89.8-95.8 |
| Density (20℃)g/cm3 | 1.12-1.22 | -- |
| Fe, mg/L | -- | 20.0 max |
| Moisture，% | -- | 3.0-6.0 |
| PH (1% water solution) | 4.0-6.0 | 4.0-6.0 |
Usage:
HEDP?Na2 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, HEDP?Na2 is used as detergent for metal and nonmetal. In dyeing industry, HEDP?Na2 is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP?Na2 is used as chelating agent.
Package and Storage:
Liquid: 200L plastic drum, IBC(1000L),customers' requirement. Storage for twelve months in shady room and dry place.
Solid: 25kg/bag, customers' requirement. Storage for ten months in shady room and dry place.
Safety Protection:
Weak acidity, Avoid contact with eye and skin, once contacted, flush with water.
Synonyms:
Disodium Etidronate Hydrate;Disodium dihydrogen bisphosphonate (1-hydroxyethylidene)bisphosphonate