|
Items |
Specifications |
|
Characteristics |
White or almost white, crystalline powder |
|
Identification |
Positive reaction |
|
Melting Point |
About 190℃ |
|
PH |
2.1-2.6 |
|
Clarity of solution |
Clear |
|
Color of solution |
≤BY7 |
|
Copper |
≤5ppm |
|
Heavy metals |
≤10ppm |
|
Mercury |
<0.1mg/kg |
|
Lead |
<3mg/kg |
|
Arsenic |
≤3ppm |
|
Cadmium(Cd) |
<1mg/kg |
|
Oxalic Acid |
≤0.2% |
|
Iron |
≤2ppm |
|
Loss of drying |
≤0.4% |
|
Sulphate ash (residue on ignition) |
≤0.1% |
|
Specific optical rotation |
+20.5°- +21.5° |
|
Mesh |
40-80 Mesh |
|
Assay |
99.0%-100.5% |
