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Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP Na4)
|
CAS NO. |
3794-83-0 (4-Na), |
|
Dequest |
2016 |
|
29329-71-3 (x-Na) |
|
|
Dequest |
2016DG |
|
Synonyms: |
Tetrasodium etidronate |
|
Molecular Formula: |
C2H4O7P2Na4 |
|
Molecular weight: |
294 |
|
Structural Formula: |
 |
Properties and Use
Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is the sodium salt of HEDP，is a good scale inhibitor for calcium carbonate，it can be used in low-pressure boiler water systems, circulating water systems, industrial, and municipal cleaning water system and swimming pool.
The solid Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is white powder，soluble in water，easily deliquescence，Convenient Transport，sui table for use in winter and freezing districts. Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid belongs to the Organic phosphate salt acid scale. The corrosion inhibitor，can form a stable complex with Fe, Cu, and Zn ions. It can dissolve the oxides on the metal surface. It has a good scale and corrosion inhibition effect under 250℃.
Specification:
|
Items |
Index |
|
|
Appearance |
White powder |
Colorless to yellowish transparent liquid |
|
Active content (HEDP)% |
≥56.0 |
20.3-21.7 |
|
Active content (HEDP Na4)% |
≥79.9 |
29.0-31.0 |
|
Fe3+ μg/g ≤ |
35.0 |
20 |
|
Moisture，% ≤ |
15 |
-- |
|
Density (20℃)g/cm3 |
-- |
1.26-1.36 |
|
PH (1% water solution) |
11.0-12.0(1%aqueous solution) |
10.0-12.0(stoste) |
Application scope and method of use：
Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is widely used in circulating cool water system, medium, and low-pressure boiler, oil field water pipelines as scale and corrosion inhibitor in electric power, chemical industry, metallurgy, fertilizer, etc. In the light woven industry, Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is used as detergent for metal and nonmetal. In the dyeing industry, Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is used as a peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is used as a chela acting agent. Daily chemicals additive。
Package and Storage:
Liquid: plastic drum，30kg or 250kg, Solid: 25kg/bag,customers’ requirement. Storage for ten months in a shady room and dry place
Safety Protection:
Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid Weak acidity, Avoid contact with eye and skin; once contacted, flush with water.
