28983-56-4 (DISODIUM SALT) 4-[Aza(4-{bis[4-(4-sulfophenyl)phenyl]methylene}cyclohexa-2,5-dienylidene)methyl]benzenesulfonic acid, disodium salt AIDS-006553 AIDS006553 C.I. 42780 C.I. Acid Blue 93 Cotton Blue Ink Blue