| ≥1 piece |
|
NO
|
Items
|
Index
|
|
1
|
Appearance
|
White powder
|
|
2
|
Assay(as Na2H2P2O7)%≥
|
95.0
|
|
3
|
PH Value
|
3.5-4.5
|
|
4
|
Water Insoluble matter %≤
|
1.0
|
|
5
|
Fluoride (as F) % ≤
|
0.005
|
|
6
|
Heavy Metals (as Pb) % ≤
|
0.001
|
|
7
|
Arsenic (As)% ≤
|
0.0003
|