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CGO

Summary
Name:sodium 3,3'-(1E,1'E)-biphenyl-4,4'-diylbis(diazene-2,1-diyl)bis(4-aminonaphthalene-1-sulfonate)
Synonyms:congo red
Formula:C32 H22 N6 Na2 O6 S2
Formal charge:0
Formula weight:696.663 Da
Component type:NON-POLYMER

Chemical Identifiers

ProgramVersionName
ACDLabs14.52{mu-[3,3'-{[1,1'-biphenyl]-4,4'-diylbis[(E)-diazene-2,1-diyl]}bis(4-aminonaphthalene-1-sulfonato-kappaO)]}disodium

Chemical Descriptors

TypeProgramVersionDescriptor
SMILESACDLabs14.52[Na+][O-]S(=O)(=O)c1cc(/N=N/c2ccc(cc2)c2ccc(cc2)/N=N/c2cc(c3ccccc3c2N)S(=O)(=O)[O-][Na+])c(N)c2ccccc12
InChIInChI1.06InChI=1S/C32H24N6O6S2.2Na/c33-31-25-7-3-1-5-23(25)29(45(39,40)41)17-27(31)37-35-21-13-9-19(10-14-21)20-11-15-22(16-12-20)36-38-28-18-30(46(42,43)44)24-6-2-4-8-26(24)32(28)34;;/h1-18H,33-34H2,(H,39,40,41)(H,42,43,44);;/q;2*+1/p-2/b37-35+,38-36+;;
InChIKeyInChI1.06IQFVPQOLBLOTPF-HKXUKFGYSA-L
SMILES_CANONICALCACTVS3.385Nc1c(cc(c2ccccc12)[S](=O)(=O)[O-][Na+])N=Nc3ccc(cc3)c4ccc(cc4)N=Nc5cc(c6ccccc6c5N)[S](=O)(=O)[O-][Na+]
SMILESCACTVS3.385Nc1c(cc(c2ccccc12)[S](=O)(=O)[O-][Na+])N=Nc3ccc(cc3)c4ccc(cc4)N=Nc5cc(c6ccccc6c5N)[S](=O)(=O)[O-][Na+]
SMILES_CANONICALOpenEye OEToolkits3.1.0.0c1cc2c(cc(c(c2cc1)N)/N=N/c3ccc(cc3)c4ccc(cc4)/N=N/c5c(c6c(c(c5)S(=O)(=O)[O-][Na+])cccc6)N)S(=O)(=O)[O-][Na+]
SMILESOpenEye OEToolkits3.1.0.0c1ccc2c(c1)c(cc(c2N)N=Nc3ccc(cc3)c4ccc(cc4)N=Nc5cc(c6ccccc6c5N)S(=O)(=O)[O-][Na+])S(=O)(=O)[O-][Na+]

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PDB entries from 2026-07-01

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