HEDP·Na4, Hydroxy Ethylidene Diphosphonic Tetrasodium

Property:

HEDP·Na4 is the tetrasodium salt of hydroxy ethylidene diphosphonic acid. This HEDP tetrasodium is a good scale inhibitor for calcium carbonate. HEDP·Na4 can be used in low-pressure boiler water systems, circulating water systems, industrial and municipal cleaning water systems, and swimming pools.

The solid HEDP·Na4 is a white powder, soluble in water, easily deliquescence, suitable for use in winter and freezing districts. It is a kind of organophorphonic acid scale and corrosion inhibitor, can form a stable complex with Fe, Cu, and Zn ions, it can dissolve the oxides on a metal surface, it has good scale and corrosion inhibition effect under 250℃.

CAS No.:

3794-83-0

Molecular Formula:

C2H4O7P2Na4

Molecular Weight:

294

Structure Formula:

HEDP·Na4 structure formula

Specifications:

Item 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.
pH (1% water solution) 10.0-12.0 (as it) 11.0-12.0
Density (20℃), g/cm3 1.26-1.36
Phosphoric acid (PO43-), % 18.4-20.4 52.0 Min.
Fe, mg/L 20.0 Max. 35 Max.
Moisture, % 15 Max.
Phosphorous Acid, % 1.0 Max.
Colour, APHA 50.0 Max.

Uses:

HEDP·Na4 is widely used in circulating cool water systems, 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 the light woven industry, HEDP tetrasodium is used as a detergent for metal and nonmetal. In the dyeing industry, HEDP·Na4 is used as a peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP tetrasodium is used as a chelating agent.

Packing 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.

Synonyms:

HEDP tetrasodium salt, Dequest 2016, Tetra-sodium hydroxyethyl diphosphonate.

Note:

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