Sodium Tripolyphosphate 94% STPP-Food Grade

(1). Sodium Tripolyphosphate 94% STPP-Food Grade :



Byname: Pent-sodium Phosphate

Molecular formula: Na5P3O10

Molecular Weight: 367.86

Standard executed: GB25566-2010(food grade)

Capacity: 20,000 t/a



(2). Properties :


White powder; Melting point 622 °C ; Easily soluble in water; It has got salient chelating capacity to metal ions of Ca

and Mg etc. and can soften hard water to make suspension into solution, alkalinity, without causticity . It is a

surfactant, and has got outstanding emulsification to lubricants and fat. It has different bulk density, i.e. low density

0.35-0.5g/cm 3, medium density 0.51-0.65g/cm3 and high density 0.66-0.9g/cm 3.This product has two crystalline

forms, namely phase I (high temperature phase) and phase II (low temperature phase). The chemical properties of the

two phases are the same, and the difference between them lies in the thermostability, hygroscopicity, solubility and

hydration heat when dissolving.



(3). Technical Data :


 Indexes Food Grade
 Assay Na5P3O10 % ≥ 94.0
 P2 O 5 % ≥ 57.0
 Water Insoluble Matter % ≤ 0.05
 Iron(Fe) % ≤ 0.015
 PH value (1% water solution) 9.5-10.0
 Heavy Metal (as Pb) % ≤ 0.001
 Arsenic (As) % ≤ 0.0003
 Fluoride (F) % ≤ 0.003
 Whiteness % ≥ 90
 Ignition loss% ≤ 1.0
 Density (g/cm3) 0.35-0.95
 Phase I 10-30



(4). Application :


In foodstuff industry it is used as quality improver in the process of canned food, fruit juice drinks, foodstuffs from

milk or soybeans. It may tender the meat in canned ham and soften the skin of horse bean in canned horse bean. It

may also serves as a softener or densifier in foodstuff industry.



(5). Packing and storage :


In 25Kg or 50 Kg or 1000 Kg net WPP/PE bags. It must be prevented from moisture and water. Don't pile up in the

open air.


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