Sodium Tri Polyphosphate

SODIUM TRI POLYPHOSPHATE

Formulation :

3H3PO4 + 5NaOH = Na5P3O10 + 7H2O
6H3PO4 + 5Na2CO3 = 2Na5P3O10 + 5CO2 + 9H20

Information on SODIUM TRI POLYPHOSPHATE

Sodium triphosphate is the sodium salt of the polyphosphate, which is the conjugate base of tri-phosphoric acid. STPP is a colorless salt, which exists as anhydrous and also as hexahydrate. Its wide spread use is well known in detergent industries. The most common method of preparation is by reacting Mono Sodium and Disodium Phosphates.

Specifications :

Product NameSodium Tri polyphosphate (STPP) Anhydrous
IUPAC NamePentasodium tri-phosphate
Molecular FormulaNa5P3O10
Molecular Weight368
Molecular Structure
AppearanceWhite fine Powder
PH Range (1% w/v)9.3 to 10.1
Poly % (minimum)90.00
P2O5 content % (minimum)56.00
‘Na’ Content % (minimum)30.00
Iron as ‘Fe’ content %0.02
Chloride as ‘Cl’ content %0.2
Sulfate as ‘SO4’ content %0.03
Packing20 Kg, 25 Kg, 40 Kg, 50 Kg,  HDPE Bags / Drums. Or As per customer’s request

Uses / Application of SODIUM TRI POLYPHOSPHATE

  • Sodium Tri polyphosphate forms a key component of commercial detergents and is used widely for that purpose
  • STPP serves as a food preservative, used to preserve meat, poultry, animal feeds and seafood
  • STPP is used in ceramics to increase viscosity of the glazes
  • Other uses of STPP are leather tanning, in flame retardants, paper, anticorrosion pigments, textile, rubber manufacture, etc