1,4-Dihydroxyanthraquinone-2-sulfonic acid 145-48-2 2-Anthracenesulfonic acid, 9,10-dihydro-1,4-dihydroxy-9,10-dioxo- 2-Quinizarinsulfonic acid C.I. 58055 C.I. Pigment Violet 5 Helio Fast Rubine 4BLA Morocco Maroon X-1550 NSC111951 Quinizarin-2-sulfonic acid Quinizarin-3-sulfonic acid Quinizarin-3-sulphonic acid Quinizarinsulfonic acid Rufianic acid