Ethylene Diamine Tetra(Methylene Phosphonic Acid)Pentasodium Salt EDTMPA·Na5
Aliases: Ethylenediamine tetramethylene phosphonate sodium, Ethylenediamine tetramethylenephosphonate sodium
CAS No. 7651-99-2
Molecular formula C6H15O12N2P4Na5
Relative molecular mass:546.13
Structural formula
Ⅰ. Performance and use
EDTMP·Na5 is a neutral product, and EDTMP·Na5 is a nitrogen-containing polyphosphonate, a cathodic corrosion inhibitor. Miscible with water, non-toxic and pollution-free, good chemical stability and temperature resistance, at 200℃ still has a good scale inhibition effect. It can dissociate into 8 positive and negative ions in aqueous solution, so it can chelate with multiple metal ions to form multiple monomer structure macromolecular reticular complex, which is loosely dispersed in water, and causes the normal crystal destruction of calcium scale. EDTMP sodium salt has good scale inhibition effect on calcium sulfate and barium sulfate scale.
EDTMP·Na5 is used for corrosion inhibitor and scale inhibitor of circulating water and boiler water, cyanide-free plating complexing agent, printing and dyeing industry soft water agent, power plant cooling water treatment, etc.
The solid product of EDTMP·Na5 has a slight moisture absorption, making it easy to transport and use in cold conditions.
Ⅱ. Technical indicators
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Item
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Indicators
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Appearance
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Amber transparent liquid
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Active components(EDTMP)/%
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24.0～26.0
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Active components(EDTMP·Na5 )/%
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30.0～32.6
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Chloride (Cl-)
%
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≤2.0
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pH(Concentrate)
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6.0～8.0
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Density（20℃）/g·cm-3
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≥1.25
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Fe content(Fe) /mg·L-1
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≤10.0
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Ⅲ. Packaging and storage
EDTMP·Na5 liquid shall be packed in plastic drums of 25kg or 250kg each, and EDTMP·Na5 solid shall be packed in polythene lined plastic bags, each bag net weight of 20Kg or as determined by the user. Store indoors in cool, dry place, moistureproof. The solid storage period is ten months and the liquid storage period is ten months.
Ⅳ. Safety protection
EDTMP·Na5 is neutral. Pay attention to labor protection during operation. Avoid contact with skin and eyes.
