| ≥1 piece |
|
Items
|
Specifications
|
|
Characteristics
|
White or almost white, crystalline powder
|
|
Identification
|
Positive reaction
|
|
Melting Point
|
About 190a??
|
|
PH
|
2.1-2.6
|
|
Clarity of solution
|
Clear
|
|
Color of solution
|
≤BY 7
|
|
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%
|