Potassium trans-β-styryltrifluoroborate is widely used in organic synthesis, particularly in cross-coupling reactions. It serves as a stable and efficient reagent in Suzuki-Miyaura coupling, enabling the formation of carbon-carbon bonds between aryl or vinyl groups. This compound is valuable in the synthesis of complex organic molecules, including pharmaceuticals, agrochemicals, and advanced materials. Its stability in air and moisture makes it a convenient choice for various applications in medicinal chemistry and material science. Additionally, it is employed in the preparation of styrene derivatives, which are key intermediates in the production of polymers, dyes, and other industrial chemicals.