1 | Description | White, crystalline powder. Is odorless and is slightly deliquescent. Its solutions are acid to litmus and effervesce with sodium carbonate. | Colorless crystals or white, crystalline powder. Is odorless and is slightly deliquescent. Its solutions are acid to litmus and effervesce with sodium carbonate. |
2 | Solubility | Complies | Freely soluble in water; practically insoluble in alcohol. |
3 | Identification A (Sodium) | Complies | A dense precipitate should form. |
4 | Identification B (Phosphate 1) | Complies | A neutral solution should yield yellow precipitate that soluble in 2N nitric acid and 6 N ammonium hydroxide |
5 | Identification B (Phosphate 2) | Complies | With ammonium molybdate solution, acidified solutions should yield a yellow precipitate that should soluble in 6N ammonium hydroxide. |
6 | Identification (By chemical test 1) | Complies | Solution should be slightly acid |
7 | Identification (By Loss on drying) | 0.6% | NMT 1.0% |
8 | Assay (Anhydrous basis) | 98.8% | 98.0% - 103.0% |
9 | Assay (Dried substance) | 98.8% | 98.0%-100.5% |
10 | Insoluble Substances | 0.003% | NMT 0.2% |
11 | Chlorides | Less than 0.014% | NMT 0.014% |
12 | Sulfate (SO4) | Less than 0.15% | NMT 0.15% |
13 | Aluminium, Calcium and Related Element | Complies | The sample solution should not become turbid when rendered slightly alkaline to litmus paper with 6N ammonium hydroxide. |
14 | Arsenic (As) | Less than 2 ppm | NMT 2 ppm |
15 | Iron (Fe) | Less than 10 ppm | NMT 10 ppm |
16 | Acidity | 4.3 | pH of the solution should be 4.2-4.5 |
17 | pH | 4.3 | 4.1 -4.5 |
18 | Clarity and colour of solution | Complies | Clear and colorless solution |
19 | Water | 0.5% | NMT 2.0% |
20 | Loss on drying at 130°C | 0.6% | NMT 1.0% |
21 | Reducing substances | Complies | The solution should retain slight red color |
22 | Total aerobic microbial count | Less than 100 CFU/gm | NMT 100 CFU/gm |
23 | Total Yeast & mold count | Less than 10 CFU/gm | NMT 10 CFU/gm |
24 | Escherichia coli | Absent/gm | should be absent/gm |
25 | Salmonella | Absent/10 gm | should be absent/10 gm |
26 | Pseud. aeruginosa | Absent/gm | should be absent/gm |
27 | Staphylococcus aureus | Absent/gm | should be absent/gm |
28 | Bile-tolerant gram negative bacteria | Absent/gm | should be absent/gm |
29 | Bacterial endotoxins | Less than 2.5 EU/gm | NMT 2.5 EU/gm |