CAS:7758-29-4 Industrial grade sodium tripolyphosphate STPP Na5P3O10

Sodium tripolyphosphate (STPP),also Sodium triphosphate (STP), or tripolyphosphate (TPP), is an inorganic compound with formula Na5P3O10. It is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of triphosphoric acid. It is produced on a large scale as a component of many domestic and industrial products, especially detergents. 

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PRODUCT FEATURES

Sodium tripolyphosphate is produced by heating a stoichiometric mixture of disodium phosphate, Na2HPO4, and monosodium phosphate, NaH2PO4, under carefully controlled conditions.

  • 2 Na2HPO4 + NaH2PO4 → Na5P3O10 + 2 H2O

STPP is a colourless salt, which exists both in anhydrous form and as the hexahydrate. The anion can be described as the pentanionic chain [O3POP(O)2OPO3]5−. Many related di-, tri-, and polyphosphates are known including the cyclic triphosphate P3O93−. It binds strongly to metal cations as both a bidentate and tridentate chelating agent.

Parameter 

ClassificationPhosphate
TypeSodium Tripolyphosphate
Grade Standard Industrial Grade
CAS No.7758-29-4
Other NamesSTTP
MFNa5P3O10
EINECS No.231-838-7
AppearanceWhite powder or granular
ApplicationMainly used as the detergent builder, and for the use of petroleum, mining, wat Er-treating industries and so on.
Brand NameWisdom Chemical
Relative molecular mass367.86
Density:0.35~0.90g/cm3
Mesh number200
Melting point622℃
Executive standardGB9983-2004




ITEM SPECIFICATIONS

                Item           Industrial Grade
Excellent classFirst classSecond class
             (Na5P3010),w/%                  ≥

Main contents
   96   90   85
             (以P205计),w/%                 ≥

P205
    57  56.5   55
              W/%                               ≤

Water insoluble
   0.1  0.1   0.15
             W/%                               ≤

Iron ( as Fe )
   0.007  0.015  0.03
            %                                   ≥

Whiteness
    90   85   80
PH value (1%solution)                  92~10.0
Particle sizeThrough 1.00mm mesh           sieve≥95%
Phase I and bulk density : According to customer's
demand


WARRANTY

Warranty:One year