The molecule is an organic sodium salt having 4-hydroxy-3-[(2-methoxyphenyl)diazenyl]naphthalene-1-sulfonate as the counterion. It has a role as a dye and an environmental contaminant. It contains a 4-hydroxy-3-[(2-methoxyphenyl)diazenyl]naphthalene-1-sulfonate.
sodium;4-hydroxy-3-[(2-methoxyphenyl)diazenyl]naphthalene-1-sulfonate