| CAS No. | 3794-83-0 | EINECE NO. | 223-267-7 |
| Molecular Formula | C2H4O7P2Na4 | Molecular Weight | 294 |
HEDP.Na4 is the tera sodium salt of HEDP (Tetrasodium (1-hydroxyethylidene) biphosphonate). HEDP.Na4 has excellent scale inhibition for calcium carbonate (CaCO3) and chlorine stability.
HEDP•Na4 solid form soluble in water, easily deliquescence, suitable for use in winter and freezing districts. It is a kind of organophorphonic acid scale and corrosion inhibitor, can form stable complex with Fe, Cu and Zn ions. HEDP.Na4 solid can dissolve the oxides on metal surface, it has good scale and corrosion inhibition effect under 250℃.
| Itas | Index | ||
|---|---|---|---|
| Appearance | White powder | Colorless to yellowish transparent liquid | |
| Active content (HEDP), % | 56.0 min | 60.0 min | 20.3-21.7 |
| Active content (HEDP•Na4), % | 80.0 min | 85.0 min | 29.0-31.0 |
| Fe, mg/L | 35.0 max | 35.0 max | 20.0 max |
| Moisture, % | 15.0 max | 10.0 max | -- |
| Density (20℃), g/cm3 | -- | -- | 1.26-1.36 |
| pH (1% water solution) | 10.0-12.0 | 10.0-12.0 | 10.0-12.0 |
HEDP•Na4 is widely used as scale and corrosion inhibitor in circulating water system, medium and low pressure boiler, oil field water pipelines,Household and I&I (industrial & institutional) cleaners, detergents.
In light woven industry, HEDP.Na4 is used as detergent for metal and nonmetal.
In dyeing industry, HEDP.Na4 is used as peroxide stabilizer and dye-fixing agent;
In non-cyanide electroplating, HEDP.Na4 is used as chelating agent.
| CaCO3 inhibition | CaSO4 inhibition | Ca3(PO4)2 inhibition | BaSO4 inhibition | CaF2 inhibition |
|---|---|---|---|---|
| Excellent | Poor | Very Good | Good | Good |
| Calcium Tolerance | Iron Control | Sequestration | Steel corrosion inhibition | |
| Poor | Yes | Good | Very Good |
| HEDP.Na4 Solid | HEDP.Na4 Liquid | ||||
|---|---|---|---|---|---|
| 25kg Bag | Bulk Bag | 25L Drum | 200L Drum | 1000L IBC | ISO Tank |
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| Once contacted with eye and skin, flush with plenty of clean water. | |||||
| Hazard Information | Safety Precaution |
|---|---|
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Not regulated |
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| Once contacted with eye and skin, flush with plenty of clean water | |
