1-Naphthalenesulfonic acid, 4-amino-3-((4-nitrophenyl)azo)-, monosodium salt 4-Amino-3-((4-nitrophenyl)azo)-1-naphthalenesulfonic acid, sodium salt 6300-18-1 Archil Red C.I. 13355 C.I. Acid Red 74 C.I. Acid Red 74, monosodium salt (8CI) NSC 45546