Re:Sodium Tripolyphosphate(STPP) Industrial Grade 
Specification:
 Na5P3O10:   94.0%Min
P2 O 5:   57.0%Min
Water Insoluble Matter: 15%Max
Iron(Fe): 0.015%Max
PH value (1% water solution):  9.2-10.0
Whiteness:  92%Min
Ignition loss:  1.0   
density (g/cm3):  0.35-0.9
Phase I:  10-30
Packing: 25kg/bag, 20MT/20’FCL

Re:Sodium Tripolyphosphate(STPP) Food Grade
Specification:
 Na5P3O10  94.0%Min
P2 O 5   57.0%Min
Water Insoluble Matter   0.04%Max
Iron(Fe)  0.006%Max
PH value (1% water solution)  9.5-10.0
Heavy Metal (as Pb)  0.001%Max
Arsenic (As)   0.0003%Max
Fluoride (F)  0.003%Max
Whiteness  92%Min
density (g/cm3)  0.35-0.9
Phase I  10-30
Packing: 25kg/bag, 20MT/20FCL