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Ethylenebis(nitrilodimethylene)tetraphosphonic acid ( EDTMPS) CAS 1429-50-1

Ethylenebis(nitrilodimethylene)tetraphosphonic acid ( EDTMPS) CAS 1429-50-1
Ethylenebis(nitrilodimethylene)tetraphosphonic acid ( EDTMPS) CAS 1429-50-1
EDTMPS Quick Details:

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.

  • Product Name :Ethylenebis(nitrilodimethylene)tetraphosphonic acid
  • CAS :1429-50-1
  • MF :C6H20N2O12P4
  • MW : 436.12
  • EINECS :215-851-5
EDTMPS Specification:
items index
Appearance Clear yellow to umber transparent liquid
Active component (EDTMPS)% 30.0min
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
EDTMPS Application:

As an organic polyphosphonic acid, EDTMPS has excellent chelating properties, so it is widely used as a corrosion inhibitor and scale inhibitor in circulating cooling water systems. It can be compounded with polycarboxylic acid, tungstate, etc. EDTMPS is also an excellent stabilizer for hydrogen peroxide. It is also widely used in electroplating industry, low-pressure boiler internal treatment, metal cleaning and other industries.


When EDTMP(S) is added separately in circulating cooling water, the general dosage is 2~10mg/L. It can be combined with HPMA at a ratio of 1:3 and used for water treatment in low-pressure boilers. This product can also be used with BTA , PAAS, zinc salt, etc. EDTMP(S) is used as a scale inhibitor, and the general concentration is greater than 10mg/L; as a corrosion inhibitor, the general concentration is greater than 30mg/L. When combined with polycarboxylic acid water treatment chemicals, the general concentration is less than 5mg/L.

EDTMPS Package:

Normally In 250kg net Plastic Drum, IBC drum can also be used as required

EDTMPS Storage:

Storage for ten months in room shady and dry place.


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