Potassium ethyltrifluoroborate is widely used in organic synthesis, particularly in cross-coupling reactions. It serves as a stable and efficient organoboron reagent in Suzuki-Miyaura coupling, enabling the formation of carbon-carbon bonds between aryl or vinyl halides and organoboron compounds. This chemical is valued for its air and moisture stability, making it easier to handle compared to other boronic acid derivatives. It is also employed in the synthesis of complex organic molecules, including pharmaceuticals, agrochemicals, and advanced materials. Additionally, its compatibility with various functional groups and mild reaction conditions makes it a versatile tool in modern synthetic chemistry.