Customization: | Available |
---|---|
CAS No.: | 7758-29-4 |
Formula: | Na5o10p3 |
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Sodium tripolyphosphate
Sodium tripolyphosphate is also known as pentasodium phosphate, sodium pyrometaphosphate, STPP, pentasodium tripolyphosphate. It is white powder or crystalline powder. Soluble in water, its aqueous solution is alkaline. Good fluidity, relative molecular mass 367.86, melting point 622ºC, bulk density 1000kg/m3, density 2.52g /cm3 (20ºC), vapor pressure < 0.1hPa (20 °C), refractive index 1.658, PH 9.0-10.0 (25ºC, 1% in H2O). Soluble in water, its aqueous solution is alkaline. Commonly used in food, as water retention agent, quality improver, pH regulator, metal chelating agent.
Analysis
|
Specification
|
Result
|
STPP content %
|
≥95
|
95.5
|
P2O5 content %
|
≥57
|
57.3
|
Water insoluble %
|
≤0.1
|
0.03
|
PH ( 1%)
|
9.5-10.0
|
9.6
|
Whiteness %
|
≥85
|
90
|
Fluoride (as F) ppm
|
50 max
|
<1
|
Arsenic (as As) ppm
|
3 max
|
<3
|
Heavy Metal(as Pb) ppm
|
10 max
|
<10
|
Chloride (as Cl) %
|
≤0.025
|
0.011
|
Sulfate (as SO42-) %
|
≤0.4
|
0.2
|
Result
|
|