Acid Black 52

1-Naphthalenesulfonic acid, 3,4-dihydro-4-[2-(2-hydroxy-1-naphthalenyl)hydrazinylidene]-7-nitro-3-oxo-, chromium sodium salt, (4E)- (3:2:2)

5610-64-0

Acid Black 52

C.I. Acid Black 52

Chromate(3-), bis(3-hydroxy-4-((2-hydroxy-1-naphthalenyl)azo)-7-nitro-1-naphthalenesulfonato(3-))-, disodium hydrogen

227-029-3

3-Hydroxy-4-((2-hydroxy-1-naphthalenyl)azo)-7-nitro-1-naphthalenesulfonic acid, monosodium salt, chromium complex