CAS No:13311-84-7
Shelf life:3 years
The detailed specifications are as below:
| Items | Standard |
| Appearance | Pale yellow crystalline powder |
| Identification | A：The infrared absorption spectrum is concordant with the reference spectrum |
| B：The retention time of the major peak in the chromatogram of the assay preparation corresponds to that in the chromatogram of the standard preparation,as obtained in the assay. | |
| Loss on drying | Not more than 0.5% |
| Residue on ignition | Not more than 0.1% |
| Related substances | 4-Nitro-3-trifluoro-methylacetanilide:≤ 0.2% |
| 4-Nitro-3-trifluoro-methylaniline:≤0.15% | |
| 3-trifluoromethylaniline:≤0.2% | |
| 4-Nitro-3-trifluoromethylpropionanilide:≤0.3% | |
| 3-trifluoromethylisoburyranilide:≤ 0.2% | |
| o-Flutamide:≤ 0.2% | |
| Unknown :≤ 0.05% | |
| Total impurities:≤0.4% | |
| Residual solvents | Ethanol:not more than 0.5% |
| Toluene:not more than 0.089% | |
| Heavy Metals | Not more than 0.0010% |
| Assay | 98.0-101.0% of C11H11F3N2O3(calculated on the dried basis) |