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Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
HEDP•Na4
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CAS No.: 29329-71-3 (x-Na), 3794-83-0 (4-Na)
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Molecular Formula: C2H4O7P2Na4
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Synonyms: Tetrasodium Etidronate |
Molecular Weight: 294 |
Properties:
HEDP•Na4 is an good scale inhibitor for calcium carbonate, it can be used in low pressure boiler water system, circulating water system, industrial and municipal cleaning water system and swimming pool.
The solid HEDP•Na4 is a kind of organophorphonic acid scale and corrosion inhibitor, can form stable complex with Fe, Cu and Zn ions, it can dissolve the oxides on metal surface, it has good scale and corrosion inhibition effect under 250℃.
HEDP•Na4 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•Na4 is used as detergent for metal and nonmetal while as peroxide stabilizer and dye-fixing agent in dyeing industry; In non-cyanide electroplating, HEDP•Na4 is used as chelating agent.
Specification:
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Items |
Index |
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Appearance |
White powder |
Colorless to yellowish transparent liquid |
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Active content (HEDP)% |
56.0 min |
20.3-21.7 |
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Active content (HEDP•Na4)% |
79.9 min |
29.0-31.0 |
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Total phosphoric acid (as PO43-) % |
52.0 min |
18.4-20.4 |
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Fe mg/L |
35.0 max |
20.0 max |
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Moisture % |
15 max |
-- |
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Density (20℃)g/cm3 |
-- |
1.26-1.36 |
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pH (1% water solution) |
11.0-12.0 |
10.0-12.0 |
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Phosphorous acid % |
--- |
1.0 max |
Package:
Liquid: 200L plastic drum, IBC(1000L), as per requirement.
Solid: 25kg/bag, as per requirement.