| ≥1 piece |
|
Test items
|
Specifications
|
|
Identification
|
Infrared absorption
|
|
Appearance
|
White crystals or crystalline powder
|
|
Specific rotation
|
+26.7~+29.0C
|
|
PH
|
5.5~7.0
|
|
Loss on drying
|
0.30% max
|
|
Residue on ignition
|
0.10% max
|
|
Chloride
|
0.05% max
|
|
Sulfate
|
0.03% max
|
|
Iron
|
30ppm max
|
|
Heavy metals
|
10ppm max
|
|
Arsenic
|
1.5ppm max
|
|
Organic volatile impurities
|
Meet requirement
|
|
Assay
|
98.5%~101.5%
|