a-Hydroxyalkanesulfonates were prepd. by the addn. of SO2 gas to a soln 0.95-1.0:1 soln. of aldehyde and alkali at such a rate as to maintain a pH of 3.0-4.5. Thus, SO2 was added to a soln. of NaOH and HCHO to give HOCH2SO3Na practically free of ionic impurities. [on SciFinder (R)]
Alcherio Martinoli, Emmanuel Droz, Wanting Jin
Alcherio Martinoli, Chiara Ercolani, Wanting Jin, Faezeh Rahbar