EDTMPS

Synonym: Dequest 2040

Molecular Formula: C6H12O12N2P4Na8 Molecular weight: 612.13

Structural Formula:

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.

EDTMPS shows excellent scale inhibition ability under temperature 200 ℃ . It dissociates 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. It has better antiscale effects to calcium

Items                                                                                   Index

Appearance                                                 Clear yellow to umber transparent liquid

Active component (EDTMPS) %                                     28.0 min

Organic phosphonic acid (asPO43- ) %                         10.0 min

Phosphorous acid (as PO33- ) %                                    5.0 max

Phosphoric acid (asPO43- ) %                                        1.0 max

pH (1% water solution)                                                     9.5-10.5

Density (20℃) g/cm3                                                        1.25 min

Chloride (Cl- ) %                                                                3.0 max

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 ETDMP:HPMA=1:3, it can be used for low pressure boiler. It can also be built with BTA,

PAAS and zinc salt.

200L plastic drum, IBC (1000L), customers’ requirement.

Storage for ten months in shady room and dry place.