1 | Description | White crystalline powder. | Colorless crystals or a white, crystalline powder. |
2 | Solubility | Complies | Freely soluble in water; practically insoluble in ethanol and in ether. |
3 | Identification (Potassium A) | Complies | A yellow or orange yellow precipitate should produce immediately |
4 | Identification (Potassium B) | Complies | A white, crystalline precipitate should produce |
5 | Identification (Potassium C) | Complies | A yellow crystalline precipitate should produce which on ignition leaves a reside of potassium chloride and platinum |
6 | Identification (Chloride A) | Complies | A curdy white precipitate which should insoluble in nitric acid but soluble in ammonia solution should form |
7 | Identification (Chloride B) | Complies | A filter-paper moistened with diphenyl carbazide solution should turn violet red. |
8 | Appearance of solution | Complies | Clear and colorless solution. |
9 | Acidity & alkalinity | Complies | NMT 0.5ml of 0.01M hydrochloric acid or of 0.01M sodium hydroxide for neutralization to bromothymol blue solution. |
10 | Arsenic (As) | Less than 1ppm | NMT 1ppm |
11 | Barium(Ba) | Complies | Should not be more opalescent than reference solution. |
12 | Heavy metals | Less than 10ppm | NMT 10ppm |
13 | Calcium(Ca)&Magnesium(Mg) | Complies | The solution remains clear. |
14 | Iron (Fe) | Less than 20ppm | NMT 20ppm |
15 | Bromide (Br) | Less than 0.1% | NMT 0.1% |
16 | Iodide(I) | Complies | The substance shows no blue colour after 5 minutes. |
17 | Sulphate (SO4) | Less than 300ppm | NMT 300ppm |
18 | Loss on drying,105°C | 0.3% | NMT 1.0% |
19 | Assay (on dried basis) | 99.8% | 99.00% - 100.50% |