Name:Trimethoprim
CAS:738-70-5
MF:C10H12O2
MW:164.2
Assay: 98.5%-101.0%(BP);99.0-101.0%(CP)
The detailed specifications are as below:
| Itemoftesting | InspectionStandard | Result | |
| Characters | Whiteoryellowish-whitepowder | Conforms | |
| Identification | A:InfraredAbsorption | IRConformstostandard | Complies |
| B:UltravioletAbsorption | Absorptivities,Calculatedonthedriedbasis,differbyNMT3.0%. | Complies | |
| MeltingRangeorTemperature | 199-203°C | 201.0-201.2°C | |
| Lossondrying | Max0.5% | 0.21% | |
| Residualonignition | Max0.1% | Notdetected | |
| Chromatographiepurity(HPLC) | |||
| Individualimpurity | Max0.1% | 0.04% | |
| Totalimpurity | Max0.2% | 0.08% | |
| Assay(ondrybasis) | 98.5~101.0% | 99.9% | |
| Conclusion | ThecommoditymeetsthestandardofUSP35 | ||