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Products
Product name: Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium
CAS: 1429-50-1
Alias: [ethylenebis[nitrilobis(methylene)]]tetrakisphosphonic acid, sodium salt
Dequest:2040
Molecular formula: C6H12O12N2P4Na8
Molecular Weight: 612.13
Structure
I. Product performance
This product is cathodic corrosion inhibitor with 3-5 times corrosion inhibition rate higher than inorganic polyphosphate. Immiscible with water, non-toxic, no pollution. Has stable chemical property and thermal resistance. It has good antiscale effect on calcium sulfate and barium sulfate.
II. Spec. In accordance with HG/T 3538-2003
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Item
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Index
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Appearance
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Yellow-brown transparent viscous liquid
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Active component (EDTMPS) % ≥
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30.0
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Organic phosphonic (PO43- )% ≥
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15.0
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Phosphite (PO33-)% ≤
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2.0
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Phosphoric acid (PO43-) % ≤
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1.0
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pH-value (1% aqueous solution)
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9.5～10.5
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Density 20℃ (g/cm3) ≥
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1.25
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III. Application scope and using method
Corrosion and scale inhibitor for circulating water and boiler water, complexing agent for non-cyanide electroplating, chelating agent for textile printing and dyeing industry and H2O2-bleaching stabilizer. Dosage in circulating cooling water is 2-10mg/L. When mixed with HPMA for 1:3, it can be used in low pressure boiler water treatment. This product can also be used with BTA, PAAS and zinc salts, etc.
IV. Packing & storage
Plastic drum, 25kg/drum or according to customer requirements. Stored in dry and cool room. Shelf life is 10 months.