1. It is used for the purification of sodium sulfonate, sulfamethazine, caprolactam, etc., as well as chloroform, phenylpropansulfone and benzaldehyde.
2. Used in printing and dyeing, organic synthesis, printing, tanning, pharmacy and other sectors; used as preservative, bleaching agent and bulking agent in food processing.
3. Used as bleaching agent, mordant, reducing agent, rubber coagulant, and also used in organic synthesis pharmacy and perfume.