On May 22, the market prices in Sichuan region remained stable. The 30% ion-exchange membrane caustic soda market stayed steady, with the main ex-factory price ranging from 3,200 to 3,400 RMB/ton (calculated on anhydrous basis). The mainstream price of 50% ion-exchange membrane caustic soda was between 3,300 and 3,500 RMB/ton (calculated on anhydrous basis). Transaction sentiment was average, with actual deals negotiable.