Disodium salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid（HEDP Na2）
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CAS NO. |
7414-83-7 |
|
Dequest |
2016BD |
|
Molecular Formula: |
C2H6O7P2Na2 |
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Molecular weight: |
250 |
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Structural Formula: |
 |
Properties:
HEDP Na2 is an organophosphorus acid corrosion inhibitor, and it can chelate with Fe, Cu, and Zn ions, it can dissolve the oxidized materials, it has right scale and corrosion inhibition effects even under 250℃, it 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 chlorine oxidation tolerance are better than that of other organophosphate-on acids. HEDP Na2 can form six-ring chelating compounds with metal ions in the water system, Ca2+ in particular. HEDP Na2 has good scale inhibition effects and apparent dissolution threshold effects. When used with other Water Treatment Chemicals, the synergistic results are better.
Specification:
|
items |
index |
|
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Appearance |
Colorless to yellowish transparent liquid |
White powder |
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Active content（HEDP）% ≥ |
16.5 |
74.0-79.0 |
|
Active content (HEDP Na2)% ≥ |
20.0 |
89.8 |
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density (20℃)g/cm3 |
1.12-1.22 |
-- |
|
Fe3+ μg/g ≤ |
-- |
35 |
|
Phosphorous acid (asPO33-)% ≤ |
-- |
2 |
|
Moisture，% |
-- |
3-6 |
|
PH (1% water solution) |
4.0-6.0 |
4.0-6.0 |
Application scope and method of use：
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 the light woven industry, HEDP Na2 is used as detergent for metal and nonmetal. In the dyeing industry, The dyes the industry fixing agent. In non-cyanide, electroplating is used as a chelating agent.
Package and Storage:
HEDP Na2 plastic drum，30kg or 250kg，or confirmed by clients Storage for ten months in shady room and dry place.
Safety Protection:
HEDP Na2 Weak acidity, Avoid contact with eye and skin. Once contacted, flush with water.
