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Sodium pyrophosphate (TSPP)

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category：Industrial application
Properties: white powder, easily soluble in water, insoluble in alcohol, relative density 2.45, melting point 890 ℃, aqueous solution is weakly alkaline, easy to deliquescence in air, aqueous solution is stable at 70 ℃, hydrolyzed to disodium hydrogen phosphate when boiled .
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Sodium pyrophosphate (TSPP)

TetraSodiumPyrophosphate

Chemical formula: Na4P2O7

Molecular weight: 265.9

CASNO: 7722-88-5

Executive standard: HG/T2968-1988 (industrial grade), GB8848-88 (food grade)

Properties: white powder, easily soluble in water, insoluble in alcohol, relative density 2.45, melting point 890 ℃, aqueous solution is weakly alkaline, easy to deliquescence in air, aqueous solution is stable at 70 ℃, hydrolyzed to disodium hydrogen phosphate when boiled .

Uses: used in washing auxiliaries, paper bleaching, electroplating industry.

Packing: inner plastic outer woven, net weight 25Kg, 50Kg, 1000Kg per bag, stored in a ventilated and dry place.

[Table unit: %]

Serial number  Indicator name    National standard  Internal control index 
1  Appearance    White powder 
2  Main content (calculated by Na4P2O7)  ≥  97.5  98 
3  Phosphorus pentoxide (as P2O5)  ≥  /  51.5 
4  Orthophosphate    Qualified  Qualified 
5  PH value (1% aqueous solution)    9.9-10.7 
6  Water insoluble matter  ≤  0.2  0.1 
7  Fineness (through 60 mesh sieve)    /  95 
8  Fluoride (in F)  ≤  /  0.002 
9  Heavy metals (in Pb)  ≤  /  0.001 
10  Arsenic (in As)  ≤  /  0.003 
11  Lead  ≤  /  0.0004 
12  Ignition weightlessness  ≤  / 0.5
Keyword:
aqueous
solution
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Ammonium Dihydrogen Phosphate (MAP)
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Potassium Pyrophosphate (TKPP)

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