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Global 1,2-Ethanedisulfonic Acid market size was valued at USD 28.4 million in 2025. The market is projected to grow from USD 29.8 million in 2026 to USD 46.5 million by 2034, exhibiting a CAGR of 5.1% during the forecast period. 1,2-Ethanedisulfonic acid, also known as ethionic acid, is an organosulfur compound with the molecular formula C₂H₆O₆S₂. It is a diprotic strong acid featuring two sulfonic acid groups attached to an ethylene backbone, making it highly soluble in water and polar solvents. The compound finds application across a range of industries, including pharmaceuticals as a counterion in salt formation, specialty chemicals manufacturing, and electrochemical processes, where its strong acidic properties and thermal stability are particularly valued. The market is witnessing steady growth driven by rising demand from the pharmaceutical sector, where 1,2-Ethanedisulfonic acid is increasingly used to improve the solubility, stability, and bioavailability of active pharmace...