β-Naphthoquinone-4-sulfonic acid, 1,2-naphthaquinone-4-sulphonic acid, 1,2-naphthaquinone-4-sulfonic acid, 1,2-naphthoquinone-4-sulfonic acid, 1-NAPHTHALENESULFONIC ACID, 3,4-DIHYDRO-3,4-DIOXO-, 1,2-naphtoquinone-4-sulfonic acid, 1,2-naphthoquinone-4-sulphonic acid