Description Standard | Q/FCCW 006-2004 |
Appearance | White or light-brown Crystal or powder |
Assay(dry basis) | ≥98.5% |
Specific rotation[α]D20 | -26.00—-29.00 |
Loss on drying | ≤1.0% |
Residue on ignition | ≤0.3% |
Ammonium(NH4+) | ≤0.04% |
Heavy metals(as Pb) | ≤20mg/kg |
Arsenic(As) | ≤2mg/kg |
PH | 5.0-6.5 |