HEDP·Na4 is the tetrasodium salt of HEDP. This HEDP tetrasodium salt is a good scale inhibitor for calcium carbonate. Therefore, it can be used in a low-pressure boiler water system, circulating water system, industrial and municipal cleaning water system, and swimming pool.
The solid HEDP·Na4 is a white powder. It can be soluble in water and easily deliquescence. HEDP tetra-sodium is suitable for use in winter and freezing districts. It is a kind of organophorphonic acid scale and corrosion inhibitor. It is a kind of organophorphonic acid scale and corrosion inhibitor. HEDP tetrasodium salt can form a stable complex with Fe, Cu, and Zn ions. HEDP·Na4 can dissolve the oxides on the metal surface. It has a good scale and corrosion inhibition effect under 250℃.
HEDP·Na4 is widely used in circulating cool water systems, medium and low-pressure boilers, and oil field water pipelines. In addition, as the scale and corrosion inhibitor, HEDP tetrasodium is used in fields such as electric power, the chemical industry, metallurgy, fertilizer, etc.
In the woven industry, this HEDP phosphonate is used as a detergent for metal and nonmetal. HEDP tetrasodium salt is used as a peroxide stabilizer and dye-fixing agent in the dyeing industry. In non-cyanide electroplating, HEDP tetrasodium is used as a chelating agent.
|Appearance||White powder||Colorless to yellowish transparent liquid|
|Active content (HEDP), %||56.0 Min.||20.3~21.7|
|Active content (HEDP Na4), %||79.9 Min.||29.0~31.0|
|Total phosphoric acid (as PO43-), %||52.0 Min.||18.4~20.4|
|Fe, mg/L||35.0 Max.||20.0 Max.|
|Moisture, %||15 Max.||—|
|Density (20℃), g/cm3||—||1.26~1.36|
|pH||11.0-12.0, (1% water solution)||10.0-12.0, (as it)|
|Phosphorous acid, %||—||1.0 Max.|
|Colour APHA||—||50.0 Max.|
Liquid: 200L plastic drum, IBC (1000L), customers’ requirements.
Solid: 25 kg/bag, customers’ requirement. Storage for ten months in a shady room and dry place.
Weak acidity, avoid contact with eyes and skin. Once contacted, flush with water.