Item
|
Standard
|
Appearance
|
Colorless or white crystals or powder, odorless and tastes sour.
|
Assay (%)
|
99.5-100.5
|
Light Transmittance (%)
|
≥ 95.0
|
Moisture (%)
|
7.5-9.0
|
Readily Carbonisablle Substance
|
≤ 1.0
|
Sulphated Ash (%)
|
≤ 0.05
|
Chloride (%)
|
≤ 0.005
|
Sulphate (%)
|
≤ 0.015
|
Oxalate (%)
|
≤ 0.01
|
Calcium (%)
|
≤ 0.02
|
Iron (mg/kg)
|
≤ 5
|
Arsenic (mg/kg)
|
≤ 1
|
Lead
|
≤0.5
|
Water Insoluble Substances
|
Filtration time not more than 1 min;
Filter membrane basically doesn't change color; Visual mottled particles not more than 3. |
Packing
|
25kg/bag
|