| ≥1 piece |
|
Characteristics |
White or almost white crystals crystalline powder |
|
Identification |
Positive Reaction |
|
Melting Point |
About 19 0 ℃ |
|
PH |
2.1-2.6 |
|
Clarity Of Solution |
Clear |
|
Colour Of Solution |
≤ BY7 |
|
Copper |
≤ 5ppm |
|
Heavy Metals |
≤ 10ppm |
|
Mercury |
<0.1mg/kg |
|
Lead |
<2mg/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° |
|
Organic Volatile Impurities |
Pass |
|
Assay |
99.0% ～ 100.5% |