Synonyms: [D2,2-Biindoline]-5,5'-disulfonicacid, 3,3'-dioxo-, aluminum salt (8CI);1H-Indole-5-sulfonic acid,2-(1,3-dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-, aluminumcomplex;Aluminum,2-(1,3-dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-1H-indole-5-sulfonicacid complex;Blue 1 Lake;Blue 2 Lake;C.I. 73015 Aluminum lake;C.I. 73015:1;C.I. Food Blue 1 Aluminum Lake;C.I. Food Blue 1:1;Certolake Indigo Carmine;FD and C Blue No. 2 Aluminum Lake;FD and C Blue No. 2 Lake;FD&;C Blue No.2 Aluminum Lake;Food Blue No. 2 aluminum lake;Indigo Carmine Lake;Japan Blue2 Aluminum Lake;Japan Food Blue No. 2 aluminum lake;Pigment Blue 63;