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SODIUM TRIPOLYPHOSPHATE(STPP)
Chemical formula：Na5P3O10
Molecularweight：367.86
Standard executed：GB/T9984-2008(Industrial Grage)
GB25566-2010(Food Grade)
Properties:
White microdot powder with luster, melting point at 622℃, easily soluble in water, with remarkable chelating ability to some metal ions such as Ca2+, Mg2+, can soften hard water, change suspensioninto solution, alkalescent, without causticity.
Application:
lt has good complexing and dispersing properties, andis used in industry as synthetic detergent, dispergator in ceramic production, and synergist of soap. lt has strong emulsifying effect on lubricating oil and fat, can be usedto adjust the PH value of buffer soap solution, and can be used as dispersant in water softener, tanning agent, dyeing assistant, paint, kaolin, magnesium oxide and calcium phosphate. ln food industry it can be used as water retention agent, quality improver, thickening agent. lt is commonly used in canned food, frozen seafood, fruitdrinks and dairy products.
Packing and storage:
plastic-woven sack with polythene inner bag, net weight 25Kg, 50Kg or 1000Kg; keep away from water or moisture, do not pile up the open air.
Technical Specifications
|
NO. |
Specifications |
Industrial Grade |
Food Grade |
|||
|
1 |
Main contents |
MIN 94.0% |
MIN 94.0% |
|||
|
2 |
Phosphorus pentoside |
MIN 56.5% |
MIN 56.5% |
|||
|
3 |
Water insoluble |
MAX 0.15% |
MAX 0.05% |
|||
|
4 |
Iron, as Fe |
MAX 0.03% |
MAX 0.015% |
|||
|
5 |
PH value of 1% solution |
9.2-10.0 |
9.2-10.0 |
|||
|
6 |
Heavy metal, as Pb |
|
MAX 0.001% |
|||
|
7 |
Arsenic, as As |
|
MAX 0.0003% |
|||
|
8 |
Fluoride, as F |
|
MAX 0.003% |
|||
|
9 |
Particle Size |
Powder |
Through 100 mesh sieve |
MIN 40.0% |
MIN 40.0% |
|
|
Through 35 mesh sieve |
MIN 90.0% |
MIN 90.0% |
||||
|
Through 16 mesh sieve |
MIN 95.0% |
MIN 95.0% |
||||
|
Fine powder |
Through 100 mesh sieve |
MIN 90.0% |
MIN 90.0% |
|||
|
10 |
Whiteness |
MIN 85.0% |
MIN 85.0% |
|||
|
11 |
Pb |
|
MAX 0.0004% |
|||
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