Synonyms: Chromate(3-),[3-[(5-chloro-2-hydroxyphenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonato(4-)][1-[(2-hydroxy-4-nitrophenyl)azo]-2-naphthalenolato(2-)]-,trihydrogen (9CI); 2,7-Naphthalenedisulfonic acid,3-[(5-chloro-2-hydroxyphenyl)azo]-4,5-dihydroxy-, chromium complex;2-Naphthalenol, 1-[(2-hydroxy-4-nitrophenyl)azo]-, chromium complex