| CHARACTERISTICS | A WHITE CRYSTALLINE POWDER |
| SOLUBILITY | SPARINGLY SOLUBLE IN WATER, FREELY SOLUBLE IN ALCOHOL, VERY SLIGHTLY SOLUBLE IN ETHER AND IN METHYLENE CHLORIDE |
| IDENTIFICATION | CONFORMS |
| MELTING RANGE | 168~172℃ |
| CHLORIDE | NOT MORE THAN 0.014% |
| SULPHATE | NOT MORE THAN 0.02% |
| SULFIDE | NO COLORATION OR SPOTTING OCCURS |
| READILY CARBONIZABLE SUBSTANCES | CONFORMS |
| FREEP-AMINOPHENOL | NOT MORE THAN 0.005% |
| RELATED SUBSTANCE | CONFORMS |
| LOSS ON DRYING | NOT MORE THAN 0.5% |
| RESIDUE ON IGNITION | NOT MORE THAN 0.1% |
| OVI | MEETS THE REQUIREMENTS |
| ASSAY | 99.0~101.0% |
| HEAVY METALS | NOT MORE THAN 0.001% |