| Itemoftesting | Specification | Result |
| Appearance | Dark-redcrystallinepowderorcrystals | conforms |
| Ratioofopticaldensity | A361/A550nm | 3.15~3.40 | 3.28 |
| A361/A278nm | 1.70~1.88 | 1.86 |
| TLC | conforms | conforms |
| Chemical | positive | positive |
| HPLC | Theretentiontimeofmajorpeakofthesamplesolutioncorrespondstothatofthestandardsolution | Correspond |
| Relatedsubstances | |
| Totalimpurities,% | ≦3.0% | 1.6% |
| Singleimpurities | |
| 7β,8β-lactocyanocobalamin,% | ≦1.0% | 0.3% |
| 50-carboxycyanocobalamin,% | ≦0.5% | Notdetected |
| 34-methylcyanocobalamin,% | ≦2.0% | 0.5% |
| 32-carboxycyanocobalamin | ≦1.0% | Notdetected |
| 8-Epi-cyanocobalamin | ≦1.0% | Notdetected |
