1 | Appearance/Description | White powder. | Colorless crystals or white powder. |
2 | Solubility | Complies | Freely soluble in water; Very slightly soluble in alcohol (96%) |
3 | Identification A (By Chemical test) | Complies | Slightly alkaline should produce pink color in solution. |
4 | Identification B (sulfate) | Complies | Colorless solution; should yield a white precipitate with barium chloride which should insoluble in hydrochloric acid and nitric acid |
5 | Identification C (for Sodium) | Complies | A dense white precipitate should produce. |
6 | Identification D (By Assay) | 97.6% | 95.0% - 100.5% w/w |
7 | Assay | 97.6% | 95.0% - 100.5% w/w |
8 | Iron | Less than 10 ppm | NMT 10 ppm |
9 | Selenium (Se) | Less than 10 ppm | NMT 10 ppm |
10 | Thiosulfates | Less than 0.1% | NMT 0.1% w/w |
11 | Zinc (Zn) | Not detected | NMT 25 ppm |
12 | Color and clarity of solution /Appearance of solution | Complies | Clear and colorless solution |