| ITEMS | STANDARD |
| Appearance | White crystals or crystalline powder |
| Assay | 99.0% min |
| Specific Rotation | -1.6 o --- -2.6 o |
| Residue on ignition | 0.05% max |
| Chloride | 0.004% max |
| Sulphate | 0.02% max |
| State of solution | clarification |
| Readily oxidizable substance | Qualified |
| Fumaric Acid | 1.0% max |
| Maleic Acid | 0.05% max |
| Heavy metals(as Pb) | 20 ppm max |
| Arsenic(As) | 2 ppm max |