Sodium Tripolyphosphate (STPP)
Synonyms: triphosphoric acid pentasodium salt, pentasodium
triphosphate, tripolyphosphate pentasodium, sodium triphosphate,
STPP, armofos, empiphos stp-D, freez-gard FP 19, polygon,
rhodiaphos H5, thermphos, tripoly
Molecular formula: Na5P3O10
Specifications:
INDEX
SPECIFICATION
RESULT
ASSAY (NA5P3O10)
94% MIN
94.2% MIN
P2O5
57% MIN
57.61% MIN
FE
0.007%
0.007%
WATER INSOLUBLE MATTER
0.1% MAX
0.1% MAX
ARSENIC(AS)
0.0005% MAX
0.0004% MAX
PH(1% WATER SOLUTION)
9.2-10.0
9.5
WHITENESS
90
92
IGNITION LOSS
1.0
1.0
DENSITY(G/CM3)
0.35-0.9
0.8
PHASE L
10-30
26.3