STPP
Chemical name:Sodium tripolyphosphate
Chemical formula: Na5P3O10
Molecular weight: 367.86
1. Properties:
White powder, surface density: 0.35-0.9g/cm3, melting point:622°C, free soluble in water, aqueous solution appears acid. It is a kind of inorganic surface active agent.
2. Specifications:
No. | Item | Top quality | First quality |
1 | Main content(base on Na5P3O10),% | 94MIN | 90 |
2 | Phosphorus pentoxide,% | 57MIN | 56.5 |
3 | Insoluble substance in water,% | 0.04MAX | 0.08 |
4 | Iron content,% | 0.006MAX | 0.007 |
5 | Whiteness,% | 92MIN | 90 |
6 | Granularity 1mm test sieve,% | 5 | 5 |
7 | Drying loss,% | 0.5MAX | 0.5 |
8 | PH value(1% aqueous solution) | 9.2--10.0 | 9.2--10 |
3. Usage: Used as main auxiliary of synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent, dye auxiliary agent, and dispersant of suspension such as paint, kaolin, magnesium oxide, calcium carbonate drilling mud, preservative agent for paper making, organic synthesis catalyzer, and used in epuration of petroleum product, gum latex storage, as dispersant, solvent in metal industry and pharmaceutical industry, also widely used in gum synthesis,
4. Packaging and transportation:
25kg-50kg woven bag lined with plastic, stored in dry and draughty place