| Testing Items | Specifications | Results |
| Appearance | White powder | Conforms |
| Identification | Meet the requirement | Conforms |
| Nitrates | ≤0.50% | 0.04% |
| Related substances | Isosorbide ≤0.20% | 0.02% |
| Isosorbide 2-nitrate ≤0.25% | 0.023% | |
| Isosorbide dinitrate ≤0.25% | 0.042% | |
| Any other single impurity ≤0.10% | 0.0003% | |
| Total impurities ≤0.50% | 0.07% | |
| Heavy metals | ≤10ppm | <10ppm |
| Assay | 66.5%~73.5% | 68.6% |
| Conclusion: The Product Conforms to CP/USP. |
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