1 | Description | A white, crystalline powder slightly hygroscopic. | A white, crystalline or granular powder or flakes, slightly hygroscopic. |
2 | Solubility | Passes | freely soluble in water, sparingly soluble in alcohol (90% v/v) |
3 | Identification A (By Chemical test) | Complies | Gives reaction (b) of Benzoates: A white sublimate is deposited on the inner wall of tube. |
4 | Identification B (By Chemical test) | Complies | Gives reaction (c) of Benzoates: The melting point of the precipitate, after recrystallisation from water& drying at a pressure of 2KPa, is 120°C to 124°C. |
5 | Identification C (By Chemical test) | Complies | Positive test for sodium. |
6 | Appearance of solution | Passes | Solution should be clear and not more intensley coloured than reference solution Y6. |
7 | Acidity or Alkalinity | Passes | Not more than 0.2 ml of 0.1 M sodium hydroxide or 0.1 M hydrochloric acid is required to change the colour of the indicator. |
8 | Halogenated compounds: Ionized chlorine | NMT 200ppm | Not more than 200ppm |
9 | Halogenated compounds: Total chlorine | NMT 300ppm | Not more than 300ppm |
10 | Heavy metals | NMT 10ppm | NMT 10ppm |
11 | Loss on drying | 0.48% | NMT 2.0% |
12 | Assay (on dried basis) | 99.10% | 99.0% - 100.5% |