Potassium trifluoro[4-(methylsulfonyl)phenyl]borate is a stable organoboron reagent primarily used in Suzuki-Miyaura cross-coupling reactions. It acts as a nucleophilic boron source, facilitating the formation of carbon-carbon bonds between aryl or vinyl halides and this borate to produce biaryls and styrenes. Valued for its superior stability over boronic acids, it enables easier handling, storage, and transport without risk of protodeboronation. This compound is essential in the synthesis of pharmaceutical intermediates (e.g., for anti-inflammatory drugs like celecoxib), agrochemicals, and organic materials. Its applications leverage palladium or other metal catalysts under mild conditions, achieving high yields and selectivity in both academic research and industrial processes.