2-Anthracenesulfonic acid, 4-((4-(acetylamino)phenyl)amino)-1-amino-9,10-dihydro-9,10-dioxo-, monosodium salt 39280-58-5 6424-85-7 84842-83-1 ALIZARIN AZUROL A 2G C.I. Acid Blue 40 EINECS 229-190-5 NSC 366218 Sodium 4-(4-acetamidophenyl-1-amino)-1-amino-9,10-dioxoanthracene-2-sulphonate acid blue 40