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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.
