Pentasodium Salt of Ethylene Diamine Tetra(Methylene Phosphonic Acid)

(EDTMP•Na5)

CAS No. 7651-99-2

Molecular Formula: C6H15O12N2P4Na5

Molecular weight: 546.13

Structural Formula:

Properties:

EDTMP•Na5 is a neutral product. It is nitrogenous organic polyphosphonic acid, which is a part of cathodic

corrosion inhibitor. EDTMP•Na5 can be fully dissolved in water, innocuous and none pollution to environment,

has good chemical stability and thermal tolerance. EDTMP• Na5 has good scale inhibition property under

temperature 200℃.

EDTMP•Na5 can dissociate into 8 positive-negative ions, thus can chelate with more than two metal ions to

form more than two polymer reticulation complex, the complex can be quickly dissolved in water to destroy the

normal crystallization of calcium scale. EDTMP•Na5 shows better scale inhibition effectsto calcium sulfate and

barium sulfate.

EDTMP • Na5 can be used as scale and corrosion inhibitor for circulating water and boiler water system,

chelating agent in non-cyanide electroplating, water-softening agent in dyeing industry, etc.

EDTMP•Na5 solid form is slightly easy to deliquescence, convenient in transportation and suitable for usaeg in

winter and freezing districts.

Specification:

Items                                                                                                                                  Index

Appearance                                                                  Amber transparent liquid                         White Powder

Active content (as EDTMPA)%                                              24.0-26.0                                             65.0 min.

Active content (as EDTMP•Na5)%                                       30.0-32.6                                             81.4 min.

Chloride(Cl-)%                                                                          2.0 max                                               2.0 max

Density (20℃) g/cm3                                                            1.25 min                                                    /

Fe, mg/L                                                                                   20.0 max                                              20 max

PH (1% water solution)                                                         6.0～8.0                                               6.0-8.0

Package and Storage:

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

Storage for ten months in shady room and dry place.