1 | Appearance | Colourless crystals. | A white or almost white, crystalline powder or colorless crystals. |
2 | Solubility | Passes | Freely soluble in water, practically insoluble in anhydrous ethanol. |
3 | Identification A (Chloride a) | Complies | A white curdled precipitate which dissolves easily in ammonia should form. |
4 | Identification A (Chloride b) | Complies | The paper should turn violet-red. |
5 | Identification B (Potassium a) | Complies | A white crystalline precipitate should form. |
6 | Identification B (Potassium b) | Complies | A yellow or orange-yellow precipitate should form immediately. |
7 | Appearance of solution | Passes | Clear and colorless solution. |
8 | Acidity & alkalinity | Complies | Not more than 0.5ml of 0.01M hydrochloric acid or of 0.01M sodium hydroxide should require to change the colour of indicator. |
9 | Bromides | Less than 0.1% | 0.1% max. |
10 | Iodides (I) | Passes | The substance should not show blue colour. |
11 | Sulfates | Less than 300ppm | 300ppm max. |
12 | Barium(Ba) | Passes | Any opalescence in the solution should not be more intense than reference solution |
13 | Iron (Fe) | Less than 20ppm | 20ppm max. |
14 | Magnesium and alkaline earth metals | Less than 200ppm | 200ppm max. (as Ca) |
15 | Loss on drying,105°C | 0.2% | 1.0% max. |
16 | Assay (on dried basis) | 99.8% | 99.0% to 101.0% |