White powder | 99.0% |
Item | Specification | Results |
Appearance | White crystal powder | White crystal powder |
Assay | â¥99.0% | 99.7% |
Boat Form | â¥98.0% | 99.5% |
Chair Form | â¤2.0% | 0.2% |
1,2,4,5-Benzenetetracarboxylic anhydride | â¤0.20% | 0.0% |
Melting Point | 285-295â | 289â |
Conclusion | Qualified |