Chemical name: Sodium tripolyphosphate; Pentasodium triphosphate; STPP
CAS Number: 7758-29-4
EINECS Number: 231-838-7
Molecular formula:Na5P3O10OÂ 3Â )Â 6
Molecular weight:367.86
Product Standard:Â GB/EP/USP/FCC
Packaging:
25kg paper-plastic composite bag lined with PE film.
Storage Condition: Kept in a light-proof,well-closed, dry and cool place.
Shelf life: 2Â years.
Sodium Tripolyphosphate STPP
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Sodium tripolyphosphate STPP is an inorganic compound, also known as pentasodium triphosphate or sodium triphosphate. It appears as a white crystalline powder. STPP is soluble in water, forming alkaline solutions, and also soluble in acids but insoluble in organic solvents. In food processing, STPP is used as an acidity regulator, chelating agent, and preservative. In industrial applications, STPP is utilized as a water treatment chemical, detergent, cleaner, and flame retardant.
| Item | Index | Result |
| Main Content (as Na5P3O10) | ≥95.0% | 95% |
| Phosphoric anhydride | ≥57.0% | 57% |
| Water-insoluble | ≤0.05% | 0.02% |
| Fe (as Fe) | ≤0.01% | 0.001% |
| PH value | 9.4-10.0 | 9.4-10.0 |
| Heavy metal (as Pb) | ≤0.001% | 0.0008% |
| Arsenic (as As) | ≤0.0003% | 0.0003% |
| Fluoride (as F) | ≤0.003% | 0.001% |
| Granularity ordinary powder
16-mesh screening volume 35-mesh screening volume 100-mesh screening volume Fine powder 100 mesh screening volume |
≥95.0% ≥90.0% ≥40.0% ≥90.0%
|
95.0% 90.0% 40.0% 90.0%
|
| whiteness | ≥90.0% | 90.0% |
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