Synonyms: 2,7-Naphthalenedisulfonicacid, 4,5-dihydroxy-3-(phenylazo)-, disodium salt (9CI);C.I. Acid Red 29(7CI);C.I. Acid Red 29, disodium salt (8CI);Chromotrope 2R (6CI);AcilanChromotrope RR;Brasilan Fast Fuchsine G;C.I. 16570;Chromotrop 2R;Chromotrope Red 2R;Disodium 4,5-dihydroxy-3-(phenylazo)naphthalene-2,7-disulfonate;Fast Fuchsin G;Fast Fuchsine G;Hispacid Fuchsin G;