organosulfonate oxoanion Sirius red 4B (acid form) Sirius red 4B(2-) 629.623 C29H19N5O8S2 -2 7-benzamido-4-hydroxy-3-({4-[(4-sulfonatophenyl)diazenyl]phenyl}diazenyl)naphthalene-2-sulfonate chebi_ontology An organosulfonate oxoanion obtained by deprotonation of the sulfonic acid groups of Sirius red 4B (acid form). IGXZMQCLUNTWCC-HSBKYFPUSA-L C12=CC=C(C=C1C=C(C(=C2O)/N=N/C=3C=CC(=CC3)/N=N/C=4C=CC(=CC4)S([O-])(=O)=O)S([O-])(=O)=O)NC(C=5C=CC=CC5)=O 629.06860 Sirius red 4B dianion InChI=1S/C29H21N5O8S2/c35-28-25-15-12-23(30-29(36)18-4-2-1-3-5-18)16-19(25)17-26(44(40,41)42)27(28)34-33-21-8-6-20(7-9-21)31-32-22-10-13-24(14-11-22)43(37,38)39/h1-17,35H,(H,30,36)(H,37,38,39)(H,40,41,42)/p-2/b32-31+,34-33+ CHEBI:88193