| CAS No. | 7414-83-7 | EINECE NO. | 700-903-6 |
| Molecular Formula | C2H6O7P2Na2 | Molecular Weight | 250 |
HEDP.Na2 is based on the dissodium salt form of HEDP (1-Hydroxy Ethylidene-1,1-Diphosphonic Acid).
HEDP.Na2 is an excellent organophosphonic acid corrosion inhibitor.
HEDP.Na2 can chelate with Fe, Cu, and Zn ions. HEDP.Na2 can dissolve the oxidized materials.
HEDP.Na2 has good scale and corrosion inhibition effects even under 250℃.
HEDP.Na2 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.
| Itas | Index | |
|---|---|---|
| Appearance | Colorless to light yellow transparent liquid | White powder |
| Active component(HEDP), % | 16.5 min | 74.0-79.0 |
| Active content(HEDP•Na2), % | 20.0 min | 89.8 min |
| Density (20℃), g/cm3 | 1.12-1.22 | -- |
| Fe, mg/L | -- | 20 max |
| Phosphorous acid (PO33-), % | -- | 3 max |
| Moisture, % | -- | 3.0-6.0 |
| PH (1% water solution) | 4.0-6.0 | 4.0-6.0 |
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.
ATMP.Na4 is mostly used with organophosphoric acid, polycarboxylic acid and salt to form all organic water treatment formulation for various circulating cooling water systems with different water quality conditions. Neutralized form and has excellent CaCO3 scale inhibitor in oilfield applications. Compatible with other additives.
| 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.Na2 Solid | HEDP.Na2 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 | |
