white powder/granule STPP Sodium Tripolyphosphate

Sodium Tripolyphosphate STPP for soap 1. soften hard water 2. salient chelating capacity 3. outstanding emulsification

Sodium Tripolyphosphate (STPP)

Molecular formula: Na5P3O10;Molecular weight: 367.86CAS No.: 7758-29-4;

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

 

Properties: 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, solubility and hydration heat when dissolving .

 

Technical Specifications: 

Phase I

No	Specification	Tech grade
1	Main content              %≥	94
2	P2O5                          %≥	57
3	Water insoluble         %≤	0.1
4	Iron, as Fe                 %≤	0.015
5	PH of 1% water solution	9.2-10.0
6	Low density	0.35-0.5g/cm3
	Medium density	0.51-0.65g/cm3
	High density	0.66-0.9 g/cm3

 

Through 16 mesh sieve  95%

Through 35 mesh sieve  90%

Through 100 mesh sieve  40%

 

Application: 1) as one of the main auxiliaries for synthetic detergent, synergist for soap; water softener. 2)Tanning agent for leather making, auxiliary for dyeing; 3)As an effective dispersion agent for suspensions of coatings, kaolin, magnesium oxide, calcium carbonate and drilling mud etc.; 4) For ceramics manufacture.

 

Packaging: 50kg or 25Kg  plastic woven bag net weight;or according to customized packing

 

white powder/granule STPP Sodium Tripolyphosphate