| ITEMS | STANDARD |
| Appearance | White crystals or crystalline powder |
| Assay | 99.0 - 100.5% |
| Specific Rotation | -0.10 o --- +0.10 o |
| Residue on ignition | 0.10% max |
| Water-insoluble substance | 0.1% max |
| Fumaric Acid | 1.0% max |
| Maleic Acid | 0.05% max |
| Heavy metals(as Pb) | 10 ppm max |
| Arsenic(As) | 4 ppm max |