|
TESTING ITEM
|
Grade I
|
Grade II
|
Solution
|
|
Assay ％， ≥
|
99 ％
|
98.5 ％
|
70 ％
|
|
Chloride (Cl-) ％， ≤
|
0.005
|
0.01
|
0.01
|
|
Iron (Fe) ％， ≤
|
0.002
|
0.005
|
0.02
|
|
Sulphate (SO4) ％， ≤
|
0.006
|
0.008
|
0.008
|
|
Phosphate (PO4) ％， ≤
|
0.1
|
0.2
|
1
|
|
Smell
|
odorless
|
odorless
|
odorless
|
|
Appearance
|
White Crystal
|
White Crystal
|
Light yellow Liquid
|
|
