| CAS No.: | 7758-29-4 |
|---|---|
| Formula: | Na5p3o10 |
| EINECS: | 231-838-7 |
|
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Sodium tripolyphosphate is a white powder crystal with good fluidity. The density of type 1 is 2.62g/cm³, and the density of type 2 is 2.57g/cm³. Melting point 622ºC. It is easily soluble in water, and its aqueous solution is alkaline.
Solubility: soluble in water, 20g/100mL (20ºC)
Sodium triphosphate (STPP or sodium tripolyphosphate) is an inorganic compound with formula Na5P3O10. 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 widespreaduse.
| Index | Standard |
| Purity(Na5P3O10) by wt % | 94.0 min |
| P2O5 by wt % | 56.5 min |
| Pyrophosphate (Na4P2O7) by wt % | 4.0 max |
| Orthophosphate and Metaphosphate by wt % | 2.0 max |
| Iron content (as Fe) by wt % | 0.01 max |
| Water Insoluble by wt % | 0.10 max |
| Bulk Density by g/ml | 0.9~1.15 |
| Phase I by wt % | 15~40 |
| Whiteness % | 85 min |
| PH value (1% solution) | 9.2~10.3 |
| Particle Size (100mesh pass by wt %) | 95 min |
Sodium tripolyphosphate has chelating, suspending, dispersing, gel dissolving, emulsifying, pH buffering and other functions. It can be used as auxiliary agent of synthetic detergent, industrial water softener, leather pre-tanning agent, dyeing assistant, organic synthesis catalyst, dispersing agent of medical industry and food additive.At present, its largest use is still as a powder synthetic detergent additives and Ceramic Degumming Agent.
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