| ≥1 piece |
|
No
|
Specification
|
Industrial grade
|
Food grade
|
|
1
|
Main content %≥
|
94.0
|
94.0
|
|
2
|
P 2 O 5 %≥
|
57.0
|
57.0
|
|
3
|
Water insoluble %≤
|
0.1
|
0.05
|
|
4
|
Iron, as Fe %≤
|
0.015
|
0.01
|
|
5
|
pH of 1% water solution
|
9.2-10.0
|
9.5-10.0
|
|
6
|
Heavy metal, as Pb %≤
|
-
|
0.001
|
|
7
|
Arsenic, as As %≤
|
-
|
0.0003
|
|
8
|
Fluoride ,as F %≤
|
-
|
0.003
|
|
9
|
Chloride, as Cl %≤
|
-
|
0.025
|