| 3,3'-([1,1'-biphenyl]-4,4'-diyl)bis(4-aminonaphthalene-1-sulfonic acid); C.I. 22120; congo red; direct red 28 | |
| Links: | 🌍 Wikipedia, 📖 PubMed |
| CAS RN: | [573-58-0] |
| Formula: | C32H22N6Na2O6S2; 696.67 g/mol |
| InChiKey: | IQFVPQOLBLOTPF-UHFFFAOYSA-L |
| SMILES: | [Na+].[Na+].Nc1c(cc(c2ccccc12)[S]([O-])(=O)=O)N=Nc3ccc(cc3)c4ccc(cc4)N=Nc5cc(c6ccccc6c5N)[S]([O-])(=O)=O |
| Melting point: | 360 °C |
| 1g dissolves in: 8.62g water; 344.83g pyridine | |