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) % ≤

0.015

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

Whiteness % ≥

90

90

Ignition loss

1.0

/

density (g/cm3)

0.35-0.9

0.35-0.9

Phase I

10-30

10-30