409345-36-4 5399-63-3 636-78-2 Benzoic acid, 4-sulfo-, monopotassium salt EINECS 226-435-8 NSC 4862 Potassium 4-carboxybenzenesulfonate Potassium hydrogen 4-sulphonatobenzoate p-Sulphobenzoic acid, monopotassium salt