Aure Chemical's 9,9-Bis(4-aminophenyl)fluorene (BAFL, CAS 15499-84-0), known as FDA. With a high thermal stability, its rigid, fluorene-derived structure and partial conjugation make it ideal for synthesizing high-performance polyimides used in aerospace, electronics, and optoelectronics, which require enhanced mechanical strength, transparency, and resistance to heat and hydrolysis.