STPP

One of our major products has a quite wide usage in daily life, A steady export volume each year.

Sodium Tripolyphosphate  

Synonym: Pentasodium Triphosphate; Pentasodium Tripolyphosphate; Sodium Phosphate Tripoly; Sodium Triphosphate; Sodium Tripolyphosphate; Stpp; Triphosphoric Acid, Pentasodium Salt

Formular: NA5O10P3   CAS NO.: 7758-29-4   H.S. No.: 2835.3100

   Packing:  in 25kg net plastic woven bag; 22mt/1x20’FCL

   Specifications:  

   Grade: Tech Grade

NA5P3O10	94% min
P2O5	57.0% min
Water insoluble matter	0.15% max
Iron (Fe)	0.01% max
Ph value (1% water solution)	9.2-10.0
Particle size through 16 mesh sieve through 35 mesh sieve trough 100 mesh sieve	95% 90% 40%
Whiteness	90 max

 

 Description: white powder; melting point 622°C; easily soluble in water; it has got salient chelating capacity to ions of ca and mg etc. And can soften hard water to make suspension solution become into clear solution; it has got weak alkalinity but no corrosiveness. 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/cm3, medium density 0.51-0.65g/cm3 and high density 0.66-0.9g/cm3. This product has two crystalline forms, namely type i (high temperature type) and type ii (low temperature type). The chemical properties of the two types are the same, and the difference between them lies in the thermostability, hygroscopicity, and solubility and hydration heat when dissolving.  

STPP