1 | Appearance | Colorless to white granules. | Colorless to white crystals or white granules. |
2 | Solubility | Passes | Freely soluble in water, Insoluble in alcohol. |
3 | Assay (Alkalimetric) | 99.79% | 99.5% - 100.5% |
4 | Identification (Ammonium) | Passes | The vapour turns moistened red litmus paper to blue and blackens a strip of filter paper moistened with mercurous nitrate. |
5 | Identification (Sulfate) | Passes | A white precipitate should from which should insoluble in hydrochloric acid or nitric acid. |
6 | Insoluble matter | Less than 0.001% | NMT 0.001% |
7 | pH(5% aq soln), at 25°C | 5.85 | 5.0 - 6.0 |
8 | Chloride (Cl) | Less than 0.0002% | NMT 0.0002% |
9 | Nitrate (NO3) | Less than 0.0010% | NMT 0.0010% |
10 | Phosphate (PO4) | Less than 0.0005% | NMT 0.0005% |
11 | Heavy metals | Less than 0.0005% | NMT 0.0005% |
12 | Aluminium (Al) | Less than 0.000075% | NMT 0.000075% |
13 | Arsenic (As) | Less than 0.00002% | NMT 0.00002% |
14 | Calcium (Ca) | Less than 0.001% | NMT 0.001% |
15 | Cadmium(Cd) | Less than 0.0001% | NMT 0.0001% |
16 | Chromium(Cr) | Less than 0.000075% | NMT 0.000075% |
17 | Copper (Cu) | Less than 0.0001% | NMT 0.0001% |
18 | Iron (Fe) | Less than 0.0002% | NMT 0.0002% |
19 | Magnesium (Mg) | Less than 0.0005% | NMT 0.0005% |
20 | Lead (Pb) | Less than 0.0002% | NMT 0.0002% |
21 | Platinum(Pt) | Less than 0.0001% | NMT 0.0001% |
22 | Zinc (Zn) | Less than 0.0001% | NMT 0.0001% |
23 | Loss on drying at 105°C | 0.04% | NMT 0.1% |
24 | Residue on ignition(as SO4) | 0.003% | NMT 0.005% |
25 | Total aerobic microbial count | Less than 1000 CFU/gm | NMT 1000 CFU/gm |
26 | Total combined yeast and mold count | Less than 10 CFU/gm | NMT 10 CFU/gm |
27 | Bacterial endotoxin | Less than 2.5 IU/gm | NMT 2.5 IU/gm |
28 | Salmonella | Absent/10gm | should be Absent/10gm |
29 | Escherichia coli | Absent/gm | should be Absent/gm |
30 | Staphylococcus aureus | Absent/gm | should be Absent/gm |
31 | Pseudomonas aeruginosa | Absent/gm | should be Absent/gm |
32 | Candida albicans | Absent/gm | should be Absent/gm |