The molecule is an organic sodium salt that is the monosodium salt of 5-[(4-amino-5-methoxy-2-methylphenyl)diazenyl]-2-methoxybenzene-1-sulfonic acid. Occasionally used for the selective staining of amyloid. It has a role as a histological dye and a fluorochrome. It contains a 5-[(4-amino-5-methoxy-2-methylphenyl)diazenyl]-2-methoxybenzene-1-sulfonate.
sodium;5-[(4-amino-5-methoxy-2-methylphenyl)diazenyl]-2-methoxybenzenesulfonate