| 1 | Description | White, caked salt. Effloresces in warm, dry air.Its solutions are alkaline to phenolphthalein. A 0.1M solution have a pH 9.1 | Colorless or white, granular or caked salt. Effloresces in warm, dry air. Its solutions are alkaline to phenolphthalein. A 0.1M solution should have a pH about 9. | USP |
| 2 | Solubility | Complies | Freely soluble in water; very slightly soluble in alcohol | USP |
| 3 | Identification A (By Chemical test) | Complies | A dense precipitate should form. | USP |
| 4 | Identification B (By Chemical test 1) | Complies | With silver nitrate solution neutral solution should yield yellow precipitate that soluble in 2N nitric acid and 6 N ammonium hydroxide. | USP |
| 5 | Identification B (By Chemical test 2) | Complies | With ammonium molybdate solution, acidified solutions should yield a yellow precipitate that should soluble in 6N ammonium hydroxide. | USP |
| 6 | Assay (on dried basis) | 99.9% | 98.0% - 100.5% (Na2HPO4) | USP |
| 7 | Insoluble Substances | 0.01% | NMT 0.4% | USP |
| 8 | Chlorides | Less than 0.06% | NMT 0.06% | USP |
| 9 | Sulfate (SO4) | Less than 0.2% | NMT 0.2% | USP |
| 10 | Arsenic (As) | Less than 1.5 ppm | NMT 1.5ppm | USP |
| 11 | Loss on drying,130°C | 46.6% | 43.0% - 50.0% | USP |
| 12 | Total aerobic microbial count | Less than 100 CFU/gm | NMT 100 CFU/gm | In-house |
| 13 | Total Yeast & mold count | Less than 10 CFU/gm | NMT 10 CFU/gm | In-house |
| 14 | Escherichia coli | Absent/gm | should be absent/gm | In-house |
| 15 | Salmonella | Absent/10 gm | should be absent/ 10gm | In-house |
| 16 | Pseud. aeruginosa | Absent/gm | should be absent/gm | In-house |
| 17 | Staphylococcus aureus | Absent/gm | should be absent/gm | In-house |
| 18 | Bile-tolerant gram negative bacteria | Absent/gm | should be absent/gm | In-house |
| 19 | Bacterial endotoxins | Less than 2.5 EU/mg | NMT 2.5 EU/mg | In-house |