Synonyms: Anazolene sodium;trisodium; Sodium Anazolene; Acid Fast Blue R; Fenazo Blue SR; Benzyl Blue R; sodium; ACID BLUE 92;4-[(4-anilino-5-sulfonatonaphthalen-1-yl)diazenyl]-5- hydroxynaphthalene-2,7-disulfonate; Sodium anoxynaphthonate; Acid Blue A; Anazolene;