Used as a key intermediate in the synthesis of fluorinated pharmaceuticals and agrochemicals due to its stable fluorinated aromatic structure and protected carboxylic acid group. The tert-butyl ester group allows for selective deprotection under mild acidic conditions, enabling controlled stepwise synthesis in complex molecules. Its pentafluorophenoxy moiety enhances lipophilicity and metabolic stability in drug candidates. Commonly employed in the development of herbicides and kinase inhibitors where fluorine substitution improves bioavailability and target binding.