4-hydroxy-3-[(2-methoxyphenyl)diazenyl]naphthalene-1-sulfonate
4-hydroxy-3-[(2-methoxyphenyl)diazenyl]naphthalene-1-sulfonate
An organosulfonate oxoanion obtained by deprotonation of the sulfo group of 4-hydroxy-3-[(2-methoxyphenyl)diazenyl]naphthalene-1-sulfonic acid.