1 | Description | White, odorless crystals | White, odorless crystals |
2 | Solubility | Passes | Soluble in water, in alcohol, and in glycerine; freely soluble in boiling water. |
3 | Identification (By IR) | Passes | The infrared spectrum should be concordant with that of succinic acid standard. It exhibits absorption at the wave numbers of about 1690 cm 1, 1424 cm 1, 1314 cm 1, 1206 cm 1, and 920 cm 1 |
4 | Identification (By HPLC) | Passes | The retention time of the major peak of the sample solution corresponds to that of the standard solution, as obtained in the assay |
5 | Water insoluble matter | 0.008% | NMT 0.01% |
6 | Melting range | 186.0°C -189.0°C | 185.0°C – 190.0°C |
7 | Chloride (Cl) | Less than 0.001% | NMT 0.001% |
8 | Phosphate (PO4) | Less than 0.001% | NMT 0.001% |
9 | Sulfate (SO4) | Less than 0.003% | NMT 0.003% |
10 | Heavy metals (as Pb) | Not detected | NMT 0.0005% |
11 | Nitrogen compounds (as N) | Less than 0.001% | NMT 0.001% |
12 | Iron (Fe) | Less than 5ppm | NMT 5ppm |
13 | Arsenic (As) | Less than 0.00015% | NMT 0.00015% |
14 | Substances reducing permanganate | Complies | The color of solution does not disappear within 3 min |
15 | Sulfated ash | 0.008% | NMT 0.02% |
16 | Assay (Alkalimetric) | 99.4% | 99.0% - 100.5% |
17 | Assay(HPLC) | 99.6% | 99.0% - 100.5% |