Sodium Tripolyphosphate 94% (STPP)

 Sodium triphosphate also sodium tripolyphosphate is an inorganic compound . 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. Environmental problems associated with eutrophication are attributed to its widespread use.

Byname:Pent-sodium Phosphate  

CAS No.:7758-29-4    

EINECS No.:231-838-7

HS code:2835310000
Molecular formula:Na₅P₃O₁₀
Molecular Weight:367.86
Standard executed :GB/T9983-2004
Capacity:30000 t/a

 Property

 

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 .

Specification:

TESTING CONTENTS ANALYSIS
NO.	Item	Index
1	Appearance	White granulate
2	Assay Na5P3O10  % ≥	94%
3	P2O5  % ≥	56
4	Water Insoluble Matter  % ≤	0.10
5.	Iron(Fe) % ≤	0.01
6	pH value (1% water solution)	9.2-10.0

 

Used as one of the main auxiliaries for synthetic detergent, synergist for soap; water softener, tanning agent for leather making,
auxiliary for dyeing; As an effective dispersion agent for suspensions of coatings, kaolin, magnesium oxide, calcium carbonate and
drilling mud etc.; As an oil contamination resistance agent in paper production.

 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.
Packing and storage:

Packing: In 25KG woven bag. 14MTS/20"FCL with pallet

Storage: It must be prevented from moisture and water. Don't pile up in the open air.