Parameter

Grade

Standard: GB/T9984-2008/QB1034-1991

Technical

Food

Assay Na5P3O10 % ≥

94.0

95.0

P2 O 5 % ≥

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

9.4-10.0

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

90.0

Density (g/cm3)

0.35-0.95

0.55-0.90

Phase I

10-30

10-30