Sodium Sulfite → 1-Naphthalenesulfinic acid

Participants

Reaction Steps

189 g of sodium sulfite was dissolved in 600 ml of water, the solution as warmed at a temperature ranging from 60° to 70° C., 68 g of 1-naphthalenesulfonyl chloride was added and then the mixture was reacted at a temperature ranging from 50° to 60° C. for 5 hours. Insolubles were filtered off, the temperature of the reaction solution was brought back to room temperature and the solution was acidified by addition of conc. hydrochloric acid. The resulting precipitates were collected by filtration to give 55 g of 1-naphthalene sulfinic acid.

Provenance & Evidence