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Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium (EDTMPS)

 

CAS No.  1429-50-1 
Molecular Formula:   C6H12O12N2P4Na8         

Molecular weight: 612.13


Properties:


EDTMPS is nitrogenous organic polyphosphonic acid, a part of 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 none pollution to 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.EDTMPS shows better antiscale effects to calcium sulfate and barium sulfate. 


Specification:

 

 
Items

index

 

Appearance

Clear yellow to umber transparent liquid

 

Active component (EDTMPS)%

28.0min

 

Organic phosphonic acid (asPO43- )%

10.0min

 

Phosphorous acid (as PO33-)%

5.0max

 

Phosphoric acid (asPO43- )%

1.0max

 

pH (1% water solution)

9.5-10.5

 

Density (20℃) g/cm3

1.25min

 

Chloride (as Cl-)%

3.0max

 

Usage:


EDTMPS can be used as corrosion inhibitor in circulating cool water system and boiler water. It is a chelating agent in non-cyanogen electroplating industry and a water-softening agent in printing & dyeing industry. When used alone, 2~10mg/L is preferred. When built with HPMA by ratio EDTMP:HPMA=1:3, it can be used for low pressure boiler. It can also be built with BTA, PAAS and zinc salt.

 

Package

 

Normally In 250kg net Plastic Drum, IBC drum can also be used as required. Storage for ten months in room shady and dry place.