| Color | Colorless or white |
| Form | Crystalline powder |
| Assay (dry basis) | 99.0%-101.0% |
| pH Value | 4.1-5.6 |
| Appearance of Solution | Clear and colorless |
| Loss on Drying | ≤ 0.2% |
| Sulfate (as SO4) | ≤ 0.010% |
| Ignition Residue | ≤ 0.1% |
| Heavy Metals | ≤ 10 ppm |
| Iron (Fe) | ≤ 10 ppm |
| Chloride | ≤ 0.011% |
| Ammonium (NH4) | ≤ 0.02% |
| Total Plate Count | ≤ 100 cfu/g |
| Yeast and Moulds | ≤ 10 cfu/g |
| Coliform | Negative |
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