| Grade |
puriss. |
| Assay |
99.0-100.5% (calc. to the dried substance) |
| Quality |
meets analytical specification of Ph. Eur. BP, USP |
| Total impurities |
ammonium, in accordance |
| |
organic volatile impurities, complies (GC) |
| |
residual solvents, in accordance |
| |
≤0.001% heavy metals (as Pb) |
| |
≤0.01% thiosulfate (S2O3) |
| |
≤0.02% free alkali (as KOH) |
| Loss |
≤0.5% loss on drying, 105 °C |
| Mp |
681 °C(lit.) |
| Anion traces |
iodate (IO3-): in accordance |
| |
iodate (IO3-): in accordance |
| |
nitrate (NO3-): in accordance |
| |
nitrite (NO2-): in accordance |
| |
sulfate (SO42-): ≤100 mg/kg |
| Cation traces |
Ba:, in accordance |
| |
Fe: ≤10 mg/kg |
| Suitability |
complies for appearance of solution |
