1 | Appearance/Description | White crystalline powder. Its solutions are acid to litmus and effervesce with sodium carbonate. | Colorless crystals or a white crystalline powder. Its solutions are acid to litmus and effervesce with sodium carbonate. |
2 | Solubility | Complies | Very soluble in water; very slightly soluble in ethanol (96%). practically insoluble in alcohol. |
3 | Identification (By chemical test) | Complies | Solution should be slightly acid. |
4 | Identification (Phosphate 1) | Complies | A neutral solution should yield yellow precipitate with silver nitrate solution that soluble in 2N nitric acid and 6 N ammonium hydroxide. |
5 | Identification (Phosphate 2) | Complies | With ammonium molybdate solution, acidified solutions should yield a yellow precipitate with ammonium molybdate solution which should soluble in 6N ammonium hydroxide. |
6 | Identification (Sodium 1) | Complies | A dense precipitate should form. |
7 | Identification D (By Loss on drying) | 12.6% | 11.5% - 14.5% |
8 | Acidity / PH | 4.40 | pH of the solution should be between 4.2 and 4.5 |
9 | Clarity and colour of solution | Complies | Clear and colorless solution |
10 | Arsenic (As) | Less than 2 ppm | NMT 2 ppm |
11 | Iron (Fe) | Less than 10 ppm | NMT 10 ppm |
12 | Sulphate (SO4) | Less than 300 ppm | NMT 300 ppm |
13 | Chloride (Cl) | Less than 140 ppm | NMT 140 ppm |
14 | Reducing substances | Complies | The solution retains a slight red color. |
15 | Loss on drying at 130°C | 12.6% | 11.5% - 14.5% |
16 | Water | 12.2% | 10.0% - 15.0% |
17 | Assay (Dried substance) | 99.8% | 98.0% - 100.5% |
18 | Insoluble Substances | 0.005% | NMT 0.2% |
19 | Aluminium, Calcium and Related Element | Complies | The sample solution should not become turbid when rendered slightly alkaline to litmus paper with 6N ammonium hydroxide. |
20 | Total aerobic microbial count | Less than 100 CFU/gm | NMT 100 CFU/gm |
21 | Total combined yeast and mold count | Less than 10 CFU/gm | NMT 10 CFU/gm |
22 | Escherichia coli | Absent/gm | should be Absent/gm |
23 | Salmonella | Absent/10 gm | should be Absent/ 10gm |
24 | Pseud. aeruginosa | Absent/gm | should be Absent/gm |
25 | Staphylococcus aureus | Absent/gm | should be Absent/gm |
26 | Bile-tolerant gram negative bacteria | Absent/gm | should be Absent/gm |
27 | Bacterial endotoxins | Less than 2.5 EU/gm | NMT 2.5 EU/gm |