| ITEM | STANDARD |
| Apperance | Almost White Crystalline powder |
| Assay % | >=99 |
| Melting point | 152-156 ℃ |
| Loss on drying % | =<1 |
| Ignition residue | =<0.1 |
| Chloride(ppm) | =<100 |
| Heavy metal(ppm) | =<3 |
| Arsenic (ppm) | =<1 |
| Ferrum (ppm) | =<10 |
| Microbiological test | Bacteria: =<3000CFU/gFungus: =<100CFU/g |