1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, sodium salt 17427-63-3 18811-72-8 19361-54-7 2-Diazo-1-naphthol-5-sulfonic acid, sodium salt 2-Diazo-1-naphthone-5-sulfonic acid, sodium salt 2-Diazonium-1-naphthol-5-sulfonic acid, sodium salt 2657-00-3 55967-39-0 AI3-62933 EINECS 220-189-5 Sodium 6-diazo-5,6-dihydro-5-oxonaphthalene-1-sulphonate