1-Amino-9,10-dihydro-9,10-dioxo-4-(phenylamino)-2-anthracenesulfonic acid 2-Anthracenesulfonic acid, 1-amino-4-anilino-9,10-dihydro-9,10-dioxo- 2-Anthracenesulfonic acid, 1-amino-9,10-dihydro-9,10-dioxo-4-(phenylamino)- 2786-71-2 C.I. Acid Blue 25 free acid NSC167429