Food Grade Phosphate Manufacturer--Mingzhi Phosphate Chemical Co., Ltd

<< Home << Products

Sodium Tripolyphosphate STPP

Sodium Tripolyphosphate

Sodium Tri-Polyphosphate(STPP)

Sodium tripolyphosphate

Molecular Formula:Na5P3O10
Product Code:7758-29-4
Storage Conditions: QB 1034-1991
Sodium tripolyphosphate (STP, sometimes STPP or sodium triphosphate or TPP) is an inorganic compound with formula of Na5P3O10. Sodium triphosphate is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of triphosphoric acid.
Sodium tripolyphosphate is produced by heating a stoichiometric mixture of disodium phosphate, Na2HPO4, and monosodium phosphate, NaH2PO4, under carefully controlled conditions.

Sodium Tripolyphosphate STPP Specifications:



Sodium tripolyphosphate 95%



White Powder or granules

Sodium Tripolyphosphate


min 95



min 57.0

Fluoride (as F)


max 30

Arsenic (As)


max 3

Heavy Metal (as Pb)


max 10

Chloride (as Cl)


max 250

Sulfate (as SO42-)


max 0.4

Water Insoluble


max  0.05

PH (1% aqueous solution)


9.5 -10.0



min  85

Sodium Tripolyphosphate Food Grade Usage:

The uses of sodium tripolyphosphate also include using it as a preservative.

Sodium Tripolyphosphate STPP can be used to preserve foods such as red meats, poultry, and seafood, helping them to retain their tenderness and moisture. Pet food and animal feed have been known to be treated with sodium triphosphate, serving the same general purpose as it does in human food.

STPP sodium tripolyphosphate also has been used in helping to preserve the quality of drinks such as milk and fruit juices.

Packing: Plastic knit bag or kraft bag, net weight 25kg or 50 kg.

Storage:Store at a cool, dry and well ventilated place. The package must be moistureproof and well sealed. Handle with care. During transportation, please avoid rains and strong sunshine. In case of fire, please use water,sandy soil or all kinds of fire extinguishers to quench it.