| M | 61.83 |
|---|---|
| m.p | 169 °C |

| White solid | Complying |
| Assay (T) | 99.5-100.5%w/w |
| Iron (Fe) | max. 0.001% |
| Heavy metals (as Pb) | max. 0.001% |
| Chloride (Cl) | max. 0.001% |
| Sulfate (SO4) | max. 0.05% |
| pH (3.3 % in water) | 3.8-4.8 |
| Insolubles in MeOH | max. 0.005% |
| Nonvolatiles with MeOH | max. 0.005% |