Indexes	Industrial Grade	Food Grade
Na5P3O10%≥	94.0	94.0
P2 O 5  %≥	57.0	57.0
Water Insoluble Matter%≤	0.15	0.04
Iron(Fe) %≤	0.015	0.006
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 %≥	92	92
density (g/cm3)	0.35-0.9	0.35-0.9
Phase I	10-30	10-30