We supply STPP/stpp: tech grade STPP/stpp and food grade STPP/stpp
STPP/stpp:
Parameter
Grade
Standard: GB/T9984-2008/QB1034-1991
Technical
Food
Assay Na5P3O10 % ≥
94.0
95.0
P2 O 5 % ≥
57.0
Water Insoluble Matter % ≤
0.15
0.05
Iron(Fe) % ≤
0.015
PH value (1% water solution)
9.2-10.0
9.4-10.0
Heavy Metal (as Pb) % ≤
-
0.001
Arsenic (As) % ≤
0.0003
Fluoride (F) % ≤
0.003
Chloride(Cl) % ≤
0.025
Sulphate(SO4)% ≤
0.4
Whiteness % ≥
90.0
Density (g/cm3)
0.35-0.95
0.55-0.90
Phase I
10-30
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