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Your present location:Products center >> Organophosphoric Salts >> HEDP•Na4(Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid) >> HEDP•Na4(Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid)

 

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)    
Molecular Formula:C2H4O7P2Na      Molecular weight: 294


Synonyms: Dequest 2016, 2016DG, Tetrasodium Etidronate
Structural Formula:



Properties:
        HEDP•Na4 is the sodium salt of HEDP and 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.
        HEDP•Na4 solid form is 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 stable complex with Fe, Cu and Zn ions. It can dissolve the oxides on metal surface and 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.
        HEDP•Na4 is used as detergent for metal and nonmetal In light woven industry while in dyeing industry, it is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP•Na4 is used as chelating agent.

 


Specification:

Items Index
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
Color APHA   50.0 max

 


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.

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