Used as a key intermediate in the synthesis of high-performance polymers, particularly in the production of polyimides and polyamides. These polymers exhibit excellent thermal stability, mechanical strength, and electrical insulation properties, making them suitable for aerospace, electronics, and advanced composite materials.

Also employed in the development of organic semiconductors and optoelectronic devices, such as organic light-emitting diodes (OLEDs) and organic transistors, due to its electron-donating amine groups, conjugated biphenyl structure, electrical conductivity, and structural stability.

Finds application in the dye, pigment, and printing ink industries as a starting material for producing light- and chemically-resistant dyes, especially azo dyes for polymers and other materials, contributing to color fastness and stability.

Additionally, utilized in electrochemical sensors, photoconductive materials for imaging devices, and as a building block in pharmaceuticals requiring aromatic diamine scaffolds.