1,4-Dihydroxy-2-sulfoanthraquinone sodium salt 2-Anthracenesulfonic acid, 9,10-dihydro-1,4-dihydroxy-9,10-dioxo-, monosodium salt 2-Anthracenesulfonic acid, 9,10-dihydro-1,4-dihydroxy-9,10-dioxo-, sodium salt 22297-70-7 33796-05-3 EINECS 244-896-3 NSC 4897 Sodium 1,4-dihydroxyanthraquinone-2-sulfonate Sodium 2-quinizarinsulfonate Sodium 9,10-dihydro-1,4-dihydroxy-9,10-dioxoanthracene-2-sulphonate