| M | 163.39 |
|---|---|
| b.p | 196 °C |
| m.p | 52-58 °C |



| Colorless to white solid | Complying |
| Assay (T) | 99.0-101.0%w/w |
| Water insolubles | <= 0.01% |
| Residue after ignition | <= 0.03% |
| Chloride (Cl) | <= 0.002% |
| Heavy metals (as Pb) | <= 0.002% |
| Iron (Fe) | <= 0.001% |
| Nitrate (NO3) | <= 0.002% |
| Phosphate (PO4) | <= 0.0005% |
| Sulfate (SO4) | <= 0.02% |
| Subs. darkened by Sulfuric Acid | Complying |