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Sodium tripolyphosphate (STTP) is an inorganic compound with formula Na5P3O10. Sodium triphosphate is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of tri Phosphoric Acid .Sodium tripolyphosphate is produced by heating a stoichiometric mixture of Disodium Phosphate , Na2HPO4, and MONOSODIUM PHOSPHATE , NaH2PO4, under carefully controlled conditions.
ITEMS | STANDARD |
ASSAY (%) (Na5P3O10) | 95 MIN |
APPEARANCE | WHITE GRANULAR |
P2O5 (%) | 57.0 MIN |
FLUORIDE (PPM) | 10MAX |
CADMIUM (PPM) | 1 MAX |
LEAD (PPM) | 4 MAX |
MERCURY (PPM) | 1 MAX |
ARSENIC (PPM) | 3 MAX |
HEAVY METAL (AS PB) (PPM) | 10 MAX |
CHLORIDES (AS CL) (%) | 0.025 MAX |
SULPHATES (SO42-) (%) | 0.4 MAX |
SUBSTANCES NOT DISSOLVED IN WATER (%) | 0.05 MAX |
PH VALUE (%) |
9.5 - 10.0 |