Xuan Gu Bao·2025-12-23 14:46Industry Overview - The domestic chlorosulfonic acid market has seen a rapid price increase, with the latest average market price reaching 3500 RMB/ton on December 23, marking a daily increase of 222 RMB/ton, or 6.77% [1] - Over the past week, the cumulative increase in chlorosulfonic acid prices has been 22.25%, and over the past month, the increase has reached 78.03% [1] - Current market conditions are characterized by tight supply and demand, leading to frequent price fluctuations, with some manufacturers adopting an "order-based pricing" model [1] Application and Demand - Chlorosulfonic acid is a crucial basic chemical raw material and chlorinating agent, primarily used in the production of pesticides, pharmaceutical intermediates, and dye synthesis, indicating stable demand [1] - It is also a key raw material for high-performance electrolyte production, particularly for lithium bis(fluorosulfonyl)imide (LiFSI), which is essential for solid-state batteries. The increasing performance requirements in the new energy vehicle and energy storage markets are expected to drive demand for high-purity battery-grade chlorosulfonic acid [1] - Additionally, chlorosulfonic acid is vital for defense, aerospace applications, and as a core raw material for specialty engineering plastics like polyether ketone ketone (PEKK) [1] Company Insights - Kaisheng New Materials is the world's largest producer of chlorosulfonic acid, with an annual capacity of 150,000 tons. The company holds a leading position in the industry due to its advantages in production processes, cost control, and circular economy practices [2] - Shilong Industrial is one of the major domestic producers of chlorosulfonic acid, with a capacity of 50,000 tons. Its downstream customers are primarily involved in the production of sucralose sweeteners, pharmaceutical intermediates, dyes, and other fine chemicals, with some applications in lithium battery materials [2]