The molecule is an organic sodium salt resulting from the formal condensation of Durazol blue 4R (acid form) with three equivalents of sodium hydroxide. It has a role as a fluorochrome and a histological dye. It contains a Durazol blue 4R(3-).
trisodium;4-[[4-[(6-anilino-1-hydroxy-3-sulfonatonaphthalen-2-yl)diazenyl]-5-methoxy-2-methylphenyl]diazenyl]-5-hydroxynaphthalene-2,7-disulfonate