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联系人 Mr. Wright
10 Princess Street, East London, Eastern Cape
STPP or sodium triphosphate is an inorganic compound with formula Na5P3O*0. STPP,Sodium Tripolyphosphate is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of triphosphoric acid. Sodium tripolyphosphate is produced by heating a stoichiometric mixture of disodium phosphate, Na2HPO4, and monosodium phosphate, NaH2PO4, under carefully controlled conditions. Sodium tripolyphosphate stpp
Specification OF FOODCHEM *4% Sodium Tripolyphosphate STPP Industrial Grade
STPP,Sodium Tripolyphosphate Food Grade
| ITEM | STANDARD |
| ASSAY (%) (Na5P3O*0) | *5 MIN |
| APPEARANCE | WHITE GRANULAR |
| P2O5 (%) | *7.0 MIN |
| FLUORIDE (PPM) | *0MAX |
| CADMIUM (PPM) | 1 MAX |
| LEAD (PPM) | 4 MAX |
| MERCURY (PPM) | 1 MAX |
| ARSENIC (PPM) | 3 MAX |
| HEAVY MENTAL (AS PB) (PPM) | *0 MAX |
| CHLORIDES (AS CL) (%) | 0.**5 MAX |
| SULPHATES (SO**-) (%) | 0.4 MAX |
| SUBSTANCES NOT DISSOLVED IN WATER (%) | 0.*5 MAX |
| PH VALUE (%) | 9.5 - *0.0 |
| LOSS ON DRYING | 0.7% MAX |
| HEXAHYDRATE | *3.5% MAX |
| WATER-INSOLUBLE SUBSTANCES | 0.1% MAX |
| HIGHER POLYPHOSPHATES | 1% MAX |
STPP,Sodium Tripolyphosphate Tech Grade
| Items | Standards | ||
| Assay (%) (Na5P3O*0) | *4%MIN | ||
| Appearance | WHITE GRANULAR | ||
| P2O5 (%) | *7.0 MIN | ||
| Bulk density | 0.4~0.6 | ||
| Iron | 0.*5%MAX | ||
| Temperature rise | 8~*0 | ||
| Polyphosphate | 0.5 MAX | ||
| PH value(%) | 9.2 - *0.0 | ||
| Ignition loss | 1.0% MAX | ||
| *0mesh through | ≥*0% |
