CAS number： 56271-94-4
Molecular formula： C15H15N3O7S
molecular weight：
Chemical structure：
| Item | Spec. | Result |
| Appearance: | White crystalline powder | White crystalline powder |
| Water : | ≤1.5% | 0.80% |
| Related substance | Lacton no: more than 1.0% | 0.55% |
| most impurities not more than 0.7% | 0.37% | |
| The total impurities not more than 2.5% | 1.00% |
