HEDP Na4 is also called HEDP Tetrasodium Salt. It is the tetrasodium salt of HEDP acid. Shandong IRO Water Treatment Co., Ltd mainly supplies two states (liquid & solid) products of HEDP Na4. For more details, please scroll down the mouse.
CAS No. 3794-83-0
Molecular Formula: C2H8O7P2
Molecular Weight: 293.96
Hydroxyethylidene Bisphosphonic Acid Tetrasodium Salt, IR-HEDP Na4, HEDP 4Na, Tetra sodium of 1-Hydroxyethylidene-1 1-Diphosphonic Acid
HEDP Na4, HEDP Tetrasodium Salt
HEDP Na4 is an organic phosphonic acid salt. This product is a sodium salt of excellent performance in inhibiting the formation of calcium carbonate and calcium sulphate. It is also an excellent chelating agent. HEDP Na4 can form the stable complex with Fe, Cu and Zn ions.
The solid HEDP Na4 is a white powder. It is soluble in water. This HEDP tetrasodium salt easily deliquescence. So it is suitable for use in winter and freezing districts. HEDP Na4 can dissolve the oxides on the metal surface. It has good scale and corrosion inhibition effect under 250℃.
This tetrasodium of HEDP is used as a stabilizer in cosmetic-dye industry. It also prevents swelling problems of the packages. HEDP Na4 provides chlorine resistance in swimming pools and removes stains from the centre (usage level 1 – 15 ppm active substance).
|Appearance||colourless to yellowish transparent liquid||white powder|
|Active content (HEDP) %||20.3 – 21.7||≥ 56.0|
|Active content (HEDP Na4) %||29.0 – 31.0||≥ 79.9|
|Phosphoric acid (as PO43- ) %||18.4 – 20.4||≥ 52.0|
|Chloride (as Cl–) ppm||≤100.0||≤50.0|
|pH (1% solution)||10.0 – 12.0||11.0 – 12.0|
|Density (20℃)g/cm3||1.26 – 1.36||—|
|Fe，mg/L||≤ 20.0||≤ 35.0|
|Colour APHA (Hazen)||≤ 150.0||—|
|Moisture %||—||≤ 15.0|
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