1,3-Bis(4-hydroxyphenoxy)benzene is primarily used in the production of high-performance polymers, particularly polyether ether ketone (PEEK) and related materials. These polymers are valued for their exceptional thermal stability, chemical resistance, and mechanical strength, making them suitable for demanding applications in aerospace, automotive, and electronics industries. The compound serves as a key monomer or intermediate in the synthesis of these advanced polymers, contributing to their robust properties. Additionally, it finds use in the development of specialty coatings and adhesives that require durability under extreme conditions. Its role in creating materials for medical implants and devices is also notable, as it ensures biocompatibility and long-term performance in the human body.