| Product No. | Product name | specifications |
| 1.18025.030 | Indigo carmine | AR25g |
| Item | AR |
| Assay(C8H5NO2) | ≥98.0% |
| Melting range | 201-204(2℃ Interval) |
| Sensitivit test to thiophene | Pass |
| Solubility test in ethanol | Pass |
| Residue on ignition(as SO4) | ≤0.1% |




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