72928-89-3

Chromium(3+);5-[[4-(dioxidoamino)-6-oxocyclohexa-2,4-dien-1-ylidene]hydrazinylidene]-6-oxonaphthalene-2-sulfonate;hydron;5-[(4-nitro-2-oxidophenyl)diazenyl]-6-oxidonaphthalene-2-sulfonate