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Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium (EDTMPS)
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CAS No. |
1429-50-1 |
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Molecular Formula: |
C6H12O12N2P4Na8 |
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Molecular weight: |
612.13 |
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Structural Formula: |
 |
Properties:
Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium is nitrogenous organic polyphosphoric acid, a part of a cathodic corrosion inhibitor. Its corrosion inhibition is 3~5 times better than that of inorganic polyphosphate. It can be fully dissolved in water, innocuous and no pollution to the environment has good chemical stability and thermal tolerance. It shows excellent scale inhibition ability under temperature 200℃. It can dissociate into 8 positive-negative ions, thus can chelate with many metal ions to form polymer reticulation complex, to destroy the normal crystallization of calcium scale. Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium shows better antiscale effects on calcium sulfate and barium sulfate.
Specification:
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items |
index |
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Appearance |
Clear yellow to umber transparent liquid |
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Active component (EDTMPS)% |
28.0min |
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Organic phosphonic acid (asPO43-)% |
10.0min |
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Phosphorous acid (as PO33-)% |
5.0max |
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Phosphoric acid (asPO43-)% |
1.0max |
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pH (1% water solution) |
9.5-10.5 |
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Density (20℃) g/cm3 |
1.25min |
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Chloride (Cl-) % |
3.0max |
Usage:
Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium can be used as a corrosion inhibitor in circulating cool water system and boiler water. It is a chelating agent in the non-cyanogen electroplating industry and a water-softening agent in the printing & dyeing industry. When used alone, 2~10mg/L is preferred. When built with HPMA by ratio Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium: HPMA=1:3, it can be used for the low-pressure boiler. It can also be built with BTA, PAAS, and zinc salt.
Package and Storage:
200L plastic drum,IBC(1000L),customers’ requirement. Storage for ten months in a shady room and dry place.
