CAS number： 86386-73-4
Molecular formula： C13H12F2N6O
molecular weight： 306.27
Chemical structure：
| SR.NO | TEST | SPECIFICATION | RESULTS |
| 1. | Description | A white or almost white crystalline powder | White crystalline powder |
| 2. | Identification | ||
| By IR | IR absorption spectrum of the test sample should be concordant with IR spectrum obtained from working standard | Complies | |
| By UV | The UV absorption spectra obtained from 200 ug/ml test solution andworking standard solution should exhibit maxima at same wavelength | Complies | |
| 3. | Clarity and colour of solution | 5% w/v solution in Methanol should be clear and colourless | complies |
| 4. | Related substance by HPLC | ||
| Impurity A | NMT 0.20% | 0.01% | |
| Impurity about RRT 0.6 | NMT 1.0% | 0.14% | |
| Impurity B | NMT 0.1% | Not detected | |
| Impurity C | NMT 0.2% | Not detected | |
| Any other individual impurity | NMT 0.1% | 0.04% | |
| Total unknown impurities | NMT 0.3% | 0.09% | |
| Total impurities | NMT 1.50% | 0.25% | |
| 5. | Iron | NMT 20 PPM | Less than 20 PPM |
| 6. | Residue on ignition | NMT 0.1% W/W | 0.02% W/W |
| 7. | Loss on Drying | NMT 0.5% W/W | 0.27% W/W |
| 8. | Assay (on dried basis) | NLT 98.0% and NMT 102.0% | 99.65% |
