| CAS No.: | 7758-29-4 |
|---|---|
| Formula: | Na5p3o10 |
| EINECS: | 231-838-7 |
|
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Molecular Formular: Na5P3O10
CAS No.: 7758-29-4
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Packing: 25kg pp or paper bag
Appearance: White powder or granular; Easily soluble in water
STPP is white powder, apparent density:0.35-0.90g/ml, melting point: 622°C, easily dissolving
in water; water solution is alkaline(PH value of 1% solution is 9.7); can hydrolyze into phosphate
in water, has good ability in complexing metal ions,; can be used to soften water; has some
surfactant properties.
| ITEM | Tech. Grade | Food Grade |
| Na5P3O10 (%): | 94Min | 94 |
| P2O5 (%): | 57Min | 57 |
| Insolubles in water (%): | 0.15Max | 0.05Max |
| Fe (%): | 0.007Max | N |
| Ph (1% solution): | 9.2-10 | 9.5-10 |
| Heavy Metal (As Pb) (%): | N | 0.01Max |
| (As) (%): | N | 0.0003Max |
| Fluoride(F) (%): | N | 0.003Max |
| Whiteness(%): | 90Min | 90Min |
| Density (g/cm3) | 0.35-0.9 | 0.35-0.9 |
| Itype content (%) | 10-30 | 10-30 |
1)In Detergents
The majority of STPP is consumed as a component of commercial detergents.
It serves as a "builder," industrial jargon for a water softener. In hard water
(water that contains high concentrations of Mg2+ and Ca2+), detergents are
deactivated. Being a highly chargedchelating agent, TPP5- binds to dications
tightly and prevents them from interfering with the sulfonate detergent.
2)Food Applications
STPP is a preservative for seafood, meats, poultry, and animal feeds.It is common
in food production as E number E451. In foods, STPP is used as an emulsifier and
to retain moisture. Many governments regulate the quantities allowed in foods,
as it can substantially increase the sale weight of seafood in particular. The UnitedStates Food and Drug Administration lists STPP as "generally recognized as safe.".
3)Other Uses
Other uses (hundreds of thousands of tons/year) include "ceramics, leather
tanning(as masking agent and synthetic tanning agent - SYNTAN), anticaking,
setting retarders, flame retardants, paper, anticorrosion pigments, textiles,
rubber manufacture, fermentation, antifreeze.
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