CAS number: 127-79-7
Molecular formula: C11H12N4O2S
molecular weight: 264.3036
Chemical structure:
Product name: | Sulphamerazine base | |
Expiry Date: | Four years | |
Inspection Standard: | USP23 | |
Analysis content | Specifications | Analysis Results |
Identification | A: The infrared absorption spectrum; | Meets A and B examine |
B: The cupric sulfate reaction test. | ||
Melting point | 234-239℃ | 234.2-235.2℃ |
Description | White, yellowish-white or pinkish white, crystals or powder. | Meets. |
Appearance of solution | Clear and not more deeply colored than reference solution Y4,BY4 or GY4. | Clear, <BY4 |
Acidity | ≤0.5ml | <0.5ml |
Related substances | Meets(≤0.5%) | Meets<0.5% |
Heavy metals | ≤0.002% | <0.002% |
Loss on drying | ≤0.5% | 0.1% |
Residue on ignition | ≤0.1% | 0.04% |
Selenium | ≤0.003% | <0.003% |
Assay(%) | 99.0%--100.5%(The dried substance) | 99.9%(The dried substance) |
Conclusion : Meets USP23 specification |