Sodium Tripolyphosphate (STPP)

Specification
Indexes Industrial Grade Food Grade
Assay Na5P3O10 % ≥ 94.0 94.0
P2O5 % ≥ 57.0 57.0
Water Insoluble Matter %≤ 0.15 0.05
Iron(Fe) %≤ 0.01 0.01
PH value (1% water solution) 9.2-10.0 9.5-10.0
Heavy Metal (as Pb) %≤ ----- 0.001
Arsenic (As) %≤ ----- 0.0003
Fluoride (F) %≤ ----- 0.003
Particle Size
Through 16 mesh sieve %≥ 95 95
Through 35 mesh sieve %≥ 90 90
Trough 100 mesh sieve %≥ 40 40
Whiteness %≥ 90 90