.alpha.-Toluenesulfonic acid, o,.alpha.-dihydroxy-, monosodium salt 2-Hydroxybenzaldehyde, sodium bisulfite adduct 4445-76-5 Benzaldehyde, 2-hydroxy-, compd. with monosodium sulfite (1:1) Benzenemethanesulfonic acid, .alpha.,2-dihydroxy-, monosodium salt NSC31653