HOUSTON — August 20, 2025 — The North American chlor-alkali industry saw significant capacity investments in 2025, directly supporting the supply of caustic soda pearls to domestic and export markets. In January 2025, Olin Corporation announced the modernization of its chlorine and caustic soda production facility in Freeport, Texas, incorporating advanced membrane cell technology to improve energy efficiency and reduce carbon emissions.
In March 2025, Westlake Chemical expanded its Lake Charles, Louisiana complex with a new chlorine derivatives unit aimed at supporting increased PVC and epoxy resin output. Formosa Plastics Corporation initiated a multi-phase upgrade at its Point Comfort, Texas site in June 2025 to enhance process automation and increase production reliability for both chlorine and caustic soda.
These expansions strengthened the domestic supply chain for caustic soda pearls, which are widely used in soap and detergent manufacturing, chemical synthesis, and solid-dosing applications where liquid delivery is impractical. The United States accounted for 77.1% of the North American chlor-alkali market in 2025, with caustic soda holding the largest product share at 57.3%.
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