1 | Description | White crystalline powder. | White to off-white crystalline powder. |
2 | Identification (By chemical test) | Complies | A precipitate is formed in the blue solution within 1 min. |
3 | Identification (By IR) | Complies | The infrared absorption spectrum of the preparation of the test sample exhibits maxima only at the same wave numbers as that of a similar preparation of working standard/reference standard. |
4 | Water content (By KF titration, w/w) | 0.39% | Not more than 0.5% |
5 | Residue on ignition ( w/w) | 0.04% | Not more than 0.1% |
6 | Heavy metals | Less than 10ppm | Not more than 10ppm |
7 | Assay by HPLC (On anhydrous basis w/w) | 99.9% | Not less than 98.5% and Not more than 101.5% |
8 | Related Substance : Maleic Acid | 0.01% | Not more than 0.1% |
9 | Related substances: unspecified impurity | 0.05% | Not more than 0.1% |
10 | Related substances, total impurities | 0.06% | Not more than 0.5% |