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 effects to 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 |
| Active content (as EDTMPA)% | 24.0-26.0 |
| Active content (as EDTMP•Na5)% | 30.0-32.6 |
| Chloride (Cl-) % | 2.0 max |
| Density (20℃) g/cm3 | 1.25 min |
| Fe, mg/L | 20.0 max |
| PH (1% water solution) | 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.
Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,
1-Diphosphonic Acid (HEDP•Na4)
CAS No. 29329-71-3 (x-Na), 3794-83-0 (4-Na) Synonyms: Tetrasodium etidronate
Molecular Formula:C2H4O7P2Na4 Molecular weight: 294
Structural Formula:
Properties:
HEDP•Na4 is the sodium salt of HEDP, HEDP•Na4 is an good scale
inhibitor for calcium carbonate, it can be used in low pressure
boiler water system, circulating water system, industrial and
municipal cleaning water system and swimming pool.
The solid HEDP•Na4 is white powder, soluble in water, easily
deliquescence, suitable for use in winter and freezing districts.
It is a kind of organophosphoric acid scale and corrosion
inhibitor, can form stable complex with Fe, Cu and Zn ions, it can
dissolve the oxides on metal surface, it has good scale and
corrosion inhibition effect under 250℃.
HEDP•Na4 is widely used in circulating cool water system, medium
and low pressure boiler, oil field water pipelines as scale and
corrosion inhibitor in fields such as electric power, chemical
industry, metallurgy, fertilizer, etc.. In light woven industry,
HEDP•Na4 is used as detergent for metal and nonmetal. In dyeing
industry, HEDP•Na4 is used as peroxide stabilizer and dye-fixing
agent; In non-cyanide electroplating, HEDP•Na4 is used as chelating
agent.
Specification:
| Items | Index |
| Appearance | Colorless to yellowish transparent liquid | White powder |
| Active content (HEDP)% | 20.3-21.7 | 56.0 min |
| Active content (HEDP•Na4)% | 29.0-31.0 | 79.9 min |
Total phosphoric acid (as PO43-) % | 18.4-20.4 | 52.0 min |
| Fe, mg/L | 20.0 max | 35.0 max |
| Moisture,% | -- | 15.0 max |
| Density (20℃)g/cm3 | 1.26-1.36 | -- |
| PH (1% water solution) | 10.0-12.0 | 11.0-12.0 |
Package and Storage:
Liquid: 200L plastic drum, IBC(1000L), customers' requirement.
Solid: 25kg/bag, customers' requirement. Storage for ten months in
shady room and dry place.
Safety Protection:
Weak acidity, Avoid contact with eye and skin, once contacted,
flush with water.
