Synonyms: Benzenemethanesulfonicacid, a-hydroxy-, monosodium salt (9CI);a-Toluenesulfonic acid, a-hydroxy-, monosodium salt (8CI);a-Toluenesulfonic acid, a-hydroxy-, sodium salt (7CI);Sulfurous acid, monosodium salt, compd. with benzaldehyde (1:1) (8CI);Benzaldehyde sodium bisulfite; Benzaldehyde sodium bisulfite adduct;Benzaldehyde, compd. with monosodium sulfite (1:1); NSC 36964; Sodium a-hydroxyphenylmethanesulfonate