5-(hydroxyimino)-6-oxo-5,6-dihydronaphthalene-2-sulfonic acid
5-(hydroxyimino)-6-oxo-5,6-dihydronaphthalene-2-sulfonic acid
An arenesulfonic acid that is 5,6-dihydronaphthalene-2-sulfonic acid bearing hydroxyimino and oxo substituents at positions 5 and 6 respectively. The trisodium-iron(3+) salt is the biological stain 'naphthol green B'.