| ≥1 piece |
|
Test items
|
Specifications
|
|
Appearance
|
White to pal e brown crystalls or crystal powder
|
|
Assay( C4H9NO3 )
|
98.8% min
|
|
Specific rotation [a] D 20
|
-26.0°to -29.0°
|
|
Loss on drying
|
0.38% max
|
|
Residue on ignition
|
0.5% max
|
|
Heavy metals (Pb)
|
20mg/kg max
|
|
Arsenic
|
2mg/kg max
|
|
pH
|
5.3~6.7
|