Used as a high-performance diamine monomer in the synthesis of polyimides and polyamides, offering exceptional thermal stability and mechanical strength. Its fluorinated structure enhances solubility in organic solvents, facilitating processing in film and fiber production. Commonly applied in aerospace, microelectronics, and insulation coatings where resistance to heat and chemicals is critical. Also employed in gas separation membranes due to its rigid, bulky structure that promotes selective permeability.