potassium phenol-4-sulfonate, potassium 4-hydroxybenzenesulfonate, 4-Hydroxy-benzolsulfonsaeure,Kalium-Verbindung, 4-hydroxy-benzenesulphonate, potassium p-hydroxybenzenesulphonate, 4-Hydroxy-benzolsulfonsaeure,Kaliumsalz, 4-hydroxy-benzenesulfonic acid,potassium salt