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EDTMPS

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EDTMPS is a nitrogen-containing organic polybasic phosphonic acid, and belongs to cathodic corrosion inhibitors. Compared with inorganic polyphosphate, its corrosion rate is 3~5 times better than them.

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  • EDTMPS
  • ThFine
  • CAS No. 22036-77-7
  • Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium Salt 

Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium Salt 

(EDTMPS)

 


CAS No.: 22036-77-7                                               EINECS NO.: 244-742-5

Molecular Formula: C6H12O12N2P4Na8                        Molecular Weight: 612.13

Structural Formula:

 

EDTMPS.gif


Properties: 

EDTMPS is a nitrogen-containing organic polybasic phosphonic acid, and belongs to cathodic corrosion inhibitors. Compared with inorganic polyphosphate, its corrosion rate is 3~5 times better than them. EDTMPS can be fully dissolved in water, innocuous and has none pollution to environment, with good chemical stability and thermal tolerance. EDTMPS shows excellent scale inhibition ability under temperature 200℃. EDTMPS can dissociate into 8 positive-negative ions in aqueous solution, thus can chelate with many metal ions to form a plurality of single-structure macromolecular reticulation complex, loosely dispersed in water, and destroy the normal crystallization of calcium scale. EDTMPS shows better inhibition effects to the scale of calcium sulfate and barium sulfate. 


Applications:

EDTMPS can be used as corrosion and scale inhibitor in circulating cool water system and boiler water, as complexing agent in non-cyanogen electroplating industry, as chelating agent and oxygen bleaching stabilizer in textile printing and dyeing industry.


Specification:

Items

Index

Appearance

Yellow to umber transparent liquid

Active component (as EDTMPS)%

30.0 min

Organic phosphonic acid (as PO43- )%

10.0 min

Phosphorous acid (as PO33-)%

3.0 max

Phosphoric acid (as PO43- )%

1.0 max

pH (1% water solution)

9.5-10.5

Density (20℃) g/cm3

1.25 min

Chloride (Cl-) %

2.0 max


Usage:

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. EDTMPS can also be built with BTAPAAS and zinc salt.


Package and Storage:

Normally in 200L HDPE drum, 1000L IBC, or customers’ requirement.

Storage for ten months in shady room and dry place.

Package


Safety Protection:

Avoid contact with eye and skin, once contacted, flush with water.


Synonyms:

EDTMPSEDTMPEDTMPAEDTPO;

Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium Salt;  

Ethylenediamine tetra(methylenephosphonic acid);



Phosphonates Antiscalants, Corrosion Inhibitors and Chelating Agents

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