1 | Appearance/Description | White, crystalline powder. The PH of the solution (1 in 100) is 4.5 | Colorless or white crystals , granular or crystalline powder. The PH of the solution (1 in 100) is about 4.5 |
2 | Solubility | Complies | Freely soluble in water, practically insoluble in ethanol (96%) and alcohol |
3 | Identification (By chemical test) | Complies | Solution should faintly acid |
4 | Identification (Phosphate 1) | Complies | A yellow color should develops |
5 | Identification (Phosphate 2) | Complies | With silver nitrate solution neutral solution should yield yellow precipitate that soluble in 2N nitric acid and 6 N ammonium hydroxide |
6 | Identification (Phosphate 3) | Complies | With ammonium molybdate solution, acidified solutions should yield a yellow precipitate that should soluble in 6N ammonium hydroxide |
7 | Identification (Potassium A) | Complies | A yellow or orange-yellow precipitate should formed immediately |
8 | Identification (Potassium B) | Complies | White crystalline precipitate should form |
9 | pH | 4.32 | 4.2 to 4.5 |
10 | Appearance of solution | Complies | Clear and colourless solution |
11 | Reducing substances | Complies | The colour of the permanganate should not be completely discharge |
12 | Chlorides | Less than 200 ppm | 200 ppm max |
13 | Sulfates | Less than 300 ppm | 300 ppm max |
14 | Iron | Less than 10 ppm | 10 ppm max |
15 | Arsenic | Less than 2 ppm | 2 ppm max |
16 | Lead | 0.8 µg/g | 5 µg/g max |
17 | Fluoride(F) | Less than 10 µg/g | 10 µg/g max |
18 | Insoluble Substances | 0.1% | 0.2% max |
19 | Loss on drying | 0.2% | 1.0 % max |
20 | Assay (on dried basis) | 99.7% | 98.0% to 100.5% |