Synonyms: Chromate(2-),[5-[(5-chloro-2-hydroxyphenyl)azo]-4,6-dihydroxy-2-naphthalenesulfonato(3-)][1-[(2-hydroxy-5-nitrophenyl)azo]-2-naphthalenolato(2-)]-,dihydrogen; Chromate(2-), [5-[[5-chloro-2-(hydroxy-kO)phenyl]azo-kN1]-4-hydroxy-6-(hydroxy-kO)-2-naphthalenesulfonato(3-)][1-[[2-(hydroxy-kO)-5-nitrophenyl]azo-kN1]-2-naphthalenolato(2-)-kO]-, dihydrogen (9CI);2-Naphthalenesulfonic acid, 5-[(5-chloro-2-hydroxyphenyl)azo]-4,6-dihydroxy-,chromium complex; 2-Naphthalenol, 1-[(2-hydroxy-5-nitrophenyl)azo]-, chromiumcomplex