1 | Appearance/Description | White, odorless, crystalline powder, slightly hygroscopic. | White, odorless, crystalline or granular powder or flakes, slightly hygroscopic. |
2 | Solubility | Complies | freely soluble in water. |
3 | Identification (Reaction (b) for Benzoate | Complies | A white sublimate should deposite on the inner wall of the tube. |
4 | Identification (Reaction (c) for Benzoate ) | 122.5°C | Melting point should be 120°C to 124°C after crystallization |
5 | Identification (Reaction (a) for Sodium) | Complies | A dense white precipitate should form |
6 | Identification (By IR) | Complies | IR spectra of the sample should be concomitant with IR spectra of the standard |
7 | Identification (By Chromatography) | Complies | The retention time of the major peak of the sample solution should correspond to that of the standard solution as obtained in the Assay |
8 | Appearance of solution | Complies | Solution should be clear and not more intensely colored than reference solution Y6. |
9 | Halogenated compounds: Ionized chlorine | Less than 200 ppm | NMT 200 ppm |
10 | Halogenated compounds: Total chlorine | Less than 300 ppm | NMT 300 ppm |
11 | Loss on drying at 105°C | 0.3% | NMT 2.0% |
12 | Water | 0.2% | NMT 1.5% |
13 | Assay (By Titration) | 99.8% | 99.0% - 100.5%(dried substance) |
14 | Assay(HPLC) | 99.64% | 99.0% - 101.0% (Anhydrous basis) |
15 | Acidity | Complies | Not more than 0.2 ml of 0.1 M sodium hydroxide should require to change the colour of the indicator. |
16 | Alkalinity | Complies | The pink color produced, if any, should discharge by the addition of 0.20 mL of 0.10N sulfuric acid |