congo red


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:[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
Molecular structure of congo red
Melting point:360 °C
1g dissolves in:
8.62g water;    344.83g pyridine