C.I.Acid Black 51 (8CI); Chromate(1-),[5-[(5-chloro-2-hydroxyphenyl)azo]-4,6-dihydroxy-2-naphthalenesulfonato(3-)]hydroxy-,sodium; 2-Naphthalenesulfonic acid,5-[(5-chloro-2-hydroxyphenyl)azo]-4,6-dihydroxy-, chromium complex; Acid Black51; C.I. 16711; Neolan Grey 3B; Vitrolan Grey 3B
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