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.
