4-Aminobenzoic acid hydrochloride is widely used in the pharmaceutical industry as an intermediate in the synthesis of various drugs, particularly those related to sulfonamide antibiotics. It plays a crucial role in the production of compounds that exhibit antibacterial properties, helping to treat infections effectively. Additionally, it is utilized in the development of local anesthetics, where it contributes to the formulation of agents that block nerve impulses, providing pain relief during medical procedures. In the field of dermatology, it is incorporated into sunscreen formulations due to its ability to absorb ultraviolet (UV) light, protecting the skin from harmful UV radiation. Furthermore, it serves as a reagent in organic chemistry laboratories for research and development purposes, aiding in the synthesis of complex organic molecules. Its versatility and functional properties make it a valuable component in both industrial and scientific applications.