Specification
| Items | Specifications |
| Appearance | White crystalline powder |
| Melting point | 180-183ºC |
| Assay | 99.0% min |
| Free hydrazide | 20.0ppm max |
| Free methanl | 0.1 max |
| Loss on drying | 0.50 max |
| Non-volatile matter | 0.01 max |
| Iron (Fe) | 0.0005 max |
| Chloride (Cl) | 0.005 max |
| Sulfate (SO 4 ) | 0.005 max |