1,2-Naphthoquinonediazide-4-sulfonic acid 2-hydrate

2-diazo-1,2-naphthoquinone-4-sulfonic acid ; 1,2-naphthoquinonediazide-4-sulfonic acid, dihydrate ; 2-diazo-1-naphthol-4-sulfonic acid hydrate ; 2-diazo-1-naphthol-4-sulfonic acid ; 2-diazonio-4-sulfonaphthalen-1-olate ; 3-diazo-3,4-dihydro-4-oxo-1-naphthalenesulfonic acid ; 1,2-diazoxy naphthalene-4-sulphoacid,=70.0% ; 2-diazonio-4-sulfo-naphthalen-1-olate ; 3-diazo-3,4-dihydro-4-oxonaphthalene-1-sulfonic acid ; diazo 74