No.	Specifications	Industrial  Grade	Food  Grade
1	Total  phosphate,   as  P2O5%≥	68.0	68.0
2	Inactive  phosphate,   as  P2O5%≤	7.5	7.5
3	Iron,   as  Fe  %≤	0.05	0.05
4	Ph  value  (1%  solution)  %≤	5.8-7.3	5.8-6.5
5	Solubility	Qualified	Qualified
6	Heavy  metals,   as  Pb    %≤		0.001
7	Arsenic,   as  As%≤		0.0003
8	Fluoride  as  F%≤		0.003
9	Water  insoluble  %≤	0.05	0.06