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.
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
Classification | Phosphate |
Type | Sodium Tripolyphosphate |
Grade Standard | Industrial Grade |
CAS No. | 7758-29-4 |
Other Names | STTP |
MF | Na5P3O10 |
EINECS No. | 231-838-7 |
Appearance | White powder or granular |
Application | Mainly used as the detergent builder, and for the use of petroleum, mining, wat Er-treating industries and so on. |
Brand Name | Wisdom Chemical |
Relative molecular mass | 367.86 |
Density: | 0.35~0.90g/cm3 |
Mesh number | 200 |
Melting point | 622℃ |
Executive standard | GB9983-2004 |
ITEM SPECIFICATIONS
Item | Industrial Grade | ||
Excellent class | First class | Second 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 size | Through 1.00mm mesh sieve≥95% | ||
Phase I and bulk density : According to customer's demand |
WARRANTY
Warranty:One year
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Jul. 29, 2019
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Jul. 29, 2019