|
Index name
|
Industrial grade
|
Food Grade
|
|
Main content (based on P2O5) %≥
|
68.0
|
68.0
|
|
Inactive phosphate(based on P2O5) %≥
|
7.5
|
7.5
|
|
PH value(1% aqueous solution)
|
5.8-7.3
|
5.8-6.5
|
|
Iron (Fe) %≤
|
0.05
|
0.05
|
|
Solubility
|
Qualified
|
Qualified
|
|
Arsenic(based on As) %≤
|
|
0.0003
|
|
Fluoride(based on F) %≤
|
|
0.003
|
|
Heavy metal(based on Pb) %≤
|
|
0.001
|
|
Water insoluble %≤
|
0.05
|
0.06
|
