Used as a reagent in Suzuki-Miyaura cross-coupling reactions, enabling the formation of carbon-carbon bonds between aryl or vinyl halides and boronic acid derivatives in organic synthesis. Its (4-ethoxyphenyl)trifluoroborate structure facilitates efficient coupling under palladium catalysis, making it valuable in pharmaceutical and agrochemical manufacturing. The trifluoroborate moiety provides enhanced stability over traditional boronic acids, while the electron-donating ethoxy group improves reactivity and selectivity for certain substrates. This potassium salt is stable under standard conditions and compatible with a variety of functional groups, supporting the efficient synthesis of complex aromatic compounds.