2-Naphthalenesulfonic acid, 6-((2,4-bis((sulfomethyl)amino)phenyl)azo)-3-((4-(p-((7-((2,4-bis((sulfomethyl)amino)phenyl)azo)-1-hydroxy-3-sulfo-2-naphthyl)azo)anilino)-3-sulfophenyl)azo)-4-hydroxy-, heptasodium salt 2519-31-5 Black 5410 Black agk C.I. 35445 CERN 5410 [Czech] Hexacol Black AGK