sodium3-hydroxy-3'-oxo-1H,3'H-[2,2'-biindole]-5,5'-disulfonate; C.I. Acid Blue 74; 2-(1,3-Dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-1H-indole-5-sulfonic Acid Disodium Salt; 12070 Blue; 1311 Blue; 5,5'-Indigodisulfonic Acid Disodium Salt; A.F. Blue No. 2; Acid Blue 74; Acid Blue W; Acid Leather Blue IC; Airedale Blue IN; Amacid Brilliant Blue; Aniline Carmine Powder; Ariavit Indigo Carmine; Atul Indigo Carmine; Basovit Blue 665E; Blue 2; Blue No. 2; Bucacid Indigotine B; C.I. 73015; C.I. 75781; C.I. Food Blue 1; C.I. Natural Blue 2; Canacert Indigo Carmine; Carmine Blue; Carmine Indigo; Cilefa Blue R; Cogilor Blue 511.11; Disodium 5,5'-indigodisulfonate; Disodium 5,5'-Indigotin Disulfonate; Dolkwal Indigo Carmine; E 132; Edicol Supra Blue X; Eurocert Indigo Carmine 311811; FD & C Blue 2; FD & C Blue No 2-307045; FD and C Blue 2; FD and
