p-Sulfophenol, PHENOL-4-SULFONIC ACID, 4-Phenolsulfonic acid, 4-PHENOLSULPHONICACID, 4-Hydroxybenzenesulfonic acid, Benzenesulfonic acid, 4-hydroxy-, P-PHENOLSULFONIC ACID, Phenolsulphonic acid, 4-Hydroxybenzenesulf, p-hydroxybenzenesulfonic acid, SULFOCARBOLIC ACID, p-hydroxyphenylsulfonic acid, 4-Hydroxyphenylsulfonic acid, Phenolsulfonic acid, m-Hydroxybenzene sulfonic acid, 4-Hydroxybenzolsulfonsäure, p-Phenolsulfonsäure, Phenol-4-sulfonsäure