CAS number： 144-83-2
Molecular formula： C10H10N4O2S
molecular weight： 250.277
Chemical structure：
| Product name: | Sulphapyridine | |
| Expiry Date: | Three years | |
| Inspection Standard: | USP25 | |
| Items | Specifications | Results |
| Description | off-white or yellowish-white crystalline powder | off-white crystalline powder |
| Clarity and colour of solution | Clear not deeper than pale yellow | Clear not deeper than pale yellow |
| Identification | Conform Withmonograph A.B.C | Pass |
| Melting point | 190--193℃ | 190.4--191.2℃ |
| Heavy metals | ≤0.002% | Pass |
| Acidity | ≤0.2ml | 0.19ml |
| Loss on drying | ≤0.5% | 0.24% |
| Sulphated ash | ≤0.1% | 0.08% |
| Assay | 99.0---101.0% | 99.52% |
| Conclusion : PASS | ||
