(4-Aminophenyl)phosphonic acid is widely used in the field of material science, particularly in the development of surface modification and coating technologies. Its ability to form strong bonds with metal oxides makes it valuable for creating self-assembled monolayers on surfaces, enhancing corrosion resistance and adhesion properties in various industrial applications.

In the pharmaceutical industry, this compound serves as a key intermediate in the synthesis of biologically active molecules. Its unique structure allows for the introduction of phosphonic acid groups into drug candidates, which can improve their pharmacokinetic properties and target specificity.

Additionally, it is employed in the production of advanced polymers and resins. The incorporation of (4-Aminophenyl)phosphonic acid into polymer matrices can improve thermal stability, flame retardancy, and mechanical strength, making it suitable for high-performance materials used in electronics, automotive, and construction industries.

In analytical chemistry, it is utilized as a chelating agent for the extraction and detection of metal ions. Its selective binding capabilities enable precise quantification of trace metals in environmental and biological samples, supporting research and quality control processes.

Overall, (4-Aminophenyl)phosphonic acid plays a versatile role across multiple industries, contributing to advancements in materials, pharmaceuticals, and analytical methodologies.