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. It can form a stable complex with Fe, Cu, and Zn ions, dissolve the oxides on a metal surface, and has a good scale and corrosion inhibition effect under 250℃.
|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.||—|
HEDP·Na4 is widely used in circulating cool water systems, medium and low-pressure boilers, and oil field water pipelines as a 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.
Liquid: 200L plastic drum, IBC(1000L), customers’ requirement.
Solid: 25kg/bag, customers’ requirement. Storage for ten months in a shady room and dry place.
Weak acidity, avoid contact with the eyes and the skin. Once contacted, flush with water.
HEDP tetrasodium salt, Dequest 2016, Tetra-sodium hydroxyethyl diphosphonate.
Contact us if you want to get the latest HEDP·Na4 price and download HEDP·Na4 SDS/MSDS.