Product: Sodium Tripolyphosphate (STPP)Formula: Na5P3O10Molecular
Weight: 367.86H. S. CODE: 28353100CAS. NO.: 7758-29-4Capacity:
30000 mt/yearStandard: GB9983-88White powder; Melting point 622 °
C; Easily soluble in water; It has got salient chelating capacity
to metal ions of Ca and Mg etc. And can soften hard water to make
suspension into solution, alkalinity, without causticity. It is a
surfactant, and has got outstanding emulsification to lubricants
and fat. It has different bulk density, i. E. Low density
0.35-0.5g/cm 3, medium density 0.51-0.65g/cm3 and high density
0.66-0.9g/cm 3. This product has two crystalline forms, namely
phase I (high temperature phase) and phase II (low temperature
phase). The chemical properties of the two phases are the same, and
the difference between them lies in the thermostability,
hygroscopicity, solubility and hydration heat when
dissolving.Indexes Industrial Grade Food Grade Assay
Na5P3O10 % ≥ 94.0 94.0 P2 O 5 %
≥ 57.0 57.0 Water Insoluble Matter %
≤ 0.10 0.05 Iron(Fe) %
≤ 0.01 0.015 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 Ignition
loss 1.0 / density
(g/cm3) 0.35-0.9 0.35-0.9
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