Specification
Items
|
Specification
|
Results
|
Appearance
|
white or almost white,
crystalline powder. |
meets the requirements
|
Assay
(
C
12
H
22
O
14
Zn
,
on the anhydrous
basis
)
|
97.0%-102.0%
|
100.48%
|
Chloride
(Cl
-
)
|
≤0.05%
|
<
0.05%
|
Sulfate
(SO
4 2-
)
|
≤0.05% | < 0.05% |
Reducing substances
(
C
6
H
12
O
6
)
|
≤1.0%
|
0.06%
|
loss on drying
|
≤11.6%
|
8.73%
|
Arsenic
(As)
|
≤3mg/kg
|
<
3mg/kg
|
PH
(10.0g/Lsolution)
|
5.5-7.5
|
5.9
|
Cadmium
(Cd )
|
≤2mg/kg
|
0.22mg/kg
|
Arsenic
(Pb)
|
≤3mg/kg
|
0.94mg/kg
|