| Test Items | Specification | Method | ||
| Appearance | Reddish Brown Powder | Visual | ||
| Purity (on dry basis) | ≥98% | HPLC | ||
| Loss on Drying | ≤12.0% | Fischer Titration | ||
| Heavy Metals | ≤ 10 ppm | ICP-MS | ||
| Arsenic | ≤ 1.5 ppm | ICP-MS | ||
| Lead | ≤ 1 ppm | ICP-MS | ||
| Mercury | ≤ 0.2 ppm | ICP-MS | ||
| Cadmium | ≤ 1 ppm | ICP-MS | ||
| Total Bacterial Count | ≤1000 CFU/g | USP<2021> | ||
| E. coli | Absent/10g | USP<2022> | ||
| Salmonella | Absent/25g | USP<2022> | ||
| Staphylococcus aureus | Absent/25g | USP<2022> | ||
| Mold & Yeast | ≤100 CFU/g | USP<2021> |