The molecule is an organic sodium salt that is the disodium salt of 5-[(4-acetamido-2-sulfophenyl)diazenyl]-6-amino-4-hydroxynaphthalene-2-sulfonic acid. Used along with acid fuchsin as a constituent of the plasma staining solution in Lendrum's Picro-Mallory for fibrin. It has a role as a histological dye and a fluorochrome. It contains a lissamine fast red(2-).
disodium;5-[(4-acetamido-2-sulfonatophenyl)diazenyl]-6-amino-4-hydroxynaphthalene-2-sulfonate