hydroxybenzenesulfonic acid, Phenol-2-sulfonic acid, hydroxybenzensulfonic acid, o-phenolsulfonic acid, 2-Hydroxybenzenesulphonic acid, acide o-hydroxybenzenesulfonique, phenolsulphonic acid, 4-hydroxyphenyl-3-sulfonic acid, Benzenesulfonic acid, 2-hydroxy-, 2-Hydroxybenzenesulfonic acid, o-hydroxybenzenesulphonic acid