SPECIFICATION
| Appearance | White or almost white, crystalline powder or colorless crystals. |
| Appearance of solution | Clear and not more colored than reference solution Y7 |
| PH | 6.0-7.5 |
| Heavy metals | ≤10ppm |
| Chloride | ≤300ppm |
| Loss on drying | ≤1.0% |
| Residue on ignition | ≤0.1% |
| Residual solvents | Methanol ≤ 0.3%Ethanol ≤0.5% |
| Chromatographic purity | ≤1.0% |
| Related substances | Any impurity ≤ 1.0%;Total impurity ≤ 1.5% |
| Assay | 98.0%-101.0% |
MOLECULAR STRUCTURE：
Molecular Formula:C12H17N5O4S
