HEDP·Na4, Hydroxy Ethylidene Diphosphonic Tetrasodium
Properties:
HEDP·Na4 is the tetrasodium salt of hydroxy ethylidene diphosphonic acid. This HEDP tetrasodium is a good scale inhibitor for calcium carbonate. HEDP·Na4 can be used in low-pressure boiler water systems, circulating water systems, industrial and municipal cleaning water systems, and swimming pools.
The solid HEDP·Na4 is a white powder, soluble in water, easily deliquescence, suitable for use in winter and freezing districts. It is a kind of organophorphonic acid scale and corrosion inhibitor. It can form a stable complex with Fe, Cu, and Zn ions, dissolve the oxides on a metal surface, and has a good scale and corrosion inhibition effect under 250℃.
CAS No.:
3794-83-0
Molecular Formula:
C2H4O7P2Na4
Molecular Weight:
294
Structure Formula:
Specifications:
| Item | Index | |
|---|---|---|
| Appearance | Colorless to yellowish transparent liquid | White powder |
| Active content (HEDP), % | 20.3-21.7 | 56.0 Min. |
| Active content (HEDP·Na4), % | 29.0-31.0 | 79.9 Min. |
| pH (1% water solution) | 10.0-12.0 (as it) | 11.0-12.0 |
| Density (20℃), g/cm3 | 1.26-1.36 | — |
| Phosphoric acid (PO43-), % | 18.4-20.4 | 52.0 Min. |
| Fe, mg/L | 20.0 Max. | 35 Max. |
| Moisture, % | — | 15 Max. |
| Phosphorous Acid, % | 1.0 Max. | — |
| Colour, APHA | 50.0 Max. | — |
Uses:
HEDP·Na4 is widely used in circulating cool water systems, medium and low-pressure boilers, and oil field water pipelines as a scale and corrosion inhibitor in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.
In the light woven industry, HEDP tetrasodium is used as a detergent for metal and nonmetal. In the dyeing industry, HEDP·Na4 is used as a peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP tetrasodium is used as a chelating agent.
Packing and Storage:
Liquid: 200L plastic drum, IBC(1000L), customers’ requirement.
Solid: 25kg/bag, customers’ requirement. Storage for ten months in a shady room and dry place.
Safety Protection:
Weak acidity, avoid contact with the eyes and the skin. Once contacted, flush with water.
Synonyms:
HEDP tetrasodium salt, Dequest 2016, Tetra-sodium hydroxyethyl diphosphonate.
Note:
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