1 | Appearance/Description | White crystalline powder,Melts at 131°C | White or practically white or almost white, crystalline powder or granules. Melts at about 130°C. |
2 | Solubility | Complies | Very soluble in water; freely soluble in alcohol and Sparingly soluble in acetone. |
3 | Identification (By IR) | Complies | IR spectra of the sample should be concomitant with IR spectra of the standard. |
4 | Identification (By Melting point) | 131.0°C | 128.0°C - 132.0°C |
5 | Appearance of solution | Complies | Clear and colourless. |
6 | Assay | 99.8% | 99.0% - 100.5% of C4H6O5. |
7 | Assay (anhydrous substance) | 99.9% | 99.0% to 101.0% |
8 | Optical Rotation | +0.00° | -0.10° to + 0.10° |
9 | Water insoluble substances | 0.007% | NMT 0.1% |
10 | Residue on ignition /Sulfated ash | 0.04% | NMT 0.1% |
11 | Related substances: Impurity A (Fumaric acid) | 0.9% | NMT 1.0 % |
12 | Related substances: Impurity B (Maleic acid) | 0.02% | NMT 0.05% |
13 | Related substances: Any other impurity | 0.02% | NMT 0.1% |
14 | Related substances: Total of other impurities | 0.03% | NMT 0.5% |
15 | Water | 0.08% | NMT 2.0% |
16 | Particle size | Complies | 100 % passes through 40mesh, NLT 55% retain on 60 mesh, NMT 85% retain on 80 mesh,and NLT 98% retain on 140mesh. |