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HEDP.4Na

Product Details

Sodium Salt of 1-Hydroxyethylene -1, 1,-Diphosphonic Acid

HEDP.4Na

(Passed REACH Pre-registration)

CAS Number: 3794-83-0(4-Na), 29329-71-3(x-Na)

Molecular Formula: C2H4O7P2 Na4

Molecular Weight: 294

Application Notes:

HEDP.4Na is the sodium salt of HEDP, it 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.

The solid HEDP.4Na 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, it has  good scale and corrosion inhibition effect under 250°C.

Recommended Uses:

HEDP.4Na 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..  In light woven industry, HEDP.4Na is used as detergent for metal and nonmetal.  In dyeing industry, HEDP.Na4 is used as peroxide stabilizer and dye-fixing  agent; In non-cyanide electroplating, HEDP.4Na is used as chelating agent.

Product Specification:

Items

                                        Index

Appearance

Water white to pale yellow liquid

White crystalline powder

Active Acid (as HEDP %)

20.3 - 21.7

57.0 - 62.0

Active Salt (as HEDP.Na4 %)

29.0 - 31.0

81.3 - 88.5

Phosphorous acid as PO33- (%)

1.5 max

1.5 max

Iron, as Fe (ppm)

20.0 max

20.0 max

Specific Gravity at 20/20°C

1.280 min

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pH @ 25°C

10.0 - 12.0(neat solution)

11.0 - 12.0(1% water solution)

Package and Storage:

Liquid: normally in 200L HDPE drum and 1000L IBC.

Solid: 25kg inner liner polyethylene (PE) bag.

Storage for 12 months in room shady and dry place.

Safety Protection:

Weak acidity, avoid contact with eye and skin, once  contacted, flush with water.

 

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