1-Amino-2-anthraquinonesulfonic acid 1-Amino-9,10-dihydro-9,10-dioxoanthracene-2-sulphonic acid 2-Anthracenesulfonic acid, 1-amino-9,10-dihydro-9,10-dioxo- 83-62-5 EINECS 201-489-5 NSC 164928