CAS number： 155-91-9
Molecular formula： C12H14N4O4S
molecular weight： 310.329
Chemical structure：
| Product Name | SULPHADI METHOXI NE BASE | |
| Shelf Life | 4 years | |
| Item | Specification | Result |
| Description | White or creamy- whi t e Crystalline powder | White or creamy- white Crystalline powder |
| Solubility | Soluble in 2N sodium hydroxide; sparingly soluble in 2Nhydrochroric acid; slightly soluble in alcohol, in ether, in chloroform, and in hexane; practically insoluble in water | conforms |
| Identification | Positive | Positive |
| Acidity | 0.1M NaOH≤0.1ml/0.5g | Conforms |
| Clarity and color of solution | Clear ≤BY5 | Conforms |
| Melting point | 198-204℃ | 198.0-199.3℃ |
| Heavy metals | ≤20ppm | ＜20ppm |
| Related substances | Conforms to BP1988 | Conforms to BP1988 |
| Loss on drying | ≤0.5% | 0.29% |
| Sulfated ash | ≤0.1% | 0.07% |
| Assay | 99.0%-101.0% | 99.41% |
| Conclusion: The above product conforms to USP30. | ||
