Synonyms: 1-Naphthalenesulfonicacid, 3,4-dihydro-3,4-dioxo-, sodium salt (8CI,9CI);1,2-Naphthoquinone-4-sodiumsulfonate;Sodium1,2-naphthoquinone-4-sulfonate;Sodium3,4-dihydro-3,4-dioxo-1-naphthalenesulfonate;Sodium3,4-dioxo-1-naphthalenesulfonate;Sodium b-naphthoquinone-4-sulfonate;