On May 6, the FOB export transaction price for caustic soda in East China was US$340/mt. The transaction price for liquid caustic soda in Northeast Asia was also US$340/mt.

Chempricehub's analysis of caustic soda, long-short rating: 1
Spot side: On May 6, the FOB export transaction price for caustic soda in East China and the transaction price for liquid caustic soda in Northeast Asia were both US$340/mt. Export demand remained stable, supporting domestic caustic soda spot prices.
Futures side: The closing price of the main caustic soda contract (2607) on the Zhengzhou Commodity Exchange on April 30, 2026, was 2,026 RMB/mt, down 29 RMB/mt from the previous trading day, with open interest of 226,601 lots. Export-side positive factors provided a certain supporting effect on futures prices, with an overall bullish bias.