3-Amino-4-hydroxybenzoic acid, also known as 3-Amino-4-hydroxybenzoate or p-Aminosalicylic acid, is a versatile compound widely utilized in various fields, particularly in pharmaceuticals and chemical research. This compound is recognized for its role as a key intermediate in the synthesis of anti-tuberculosis medications and other therapeutic agents. Its unique structure, featuring both amino and hydroxyl functional groups, enhances its reactivity and allows for diverse chemical modifications, making it an essential building block in drug development.

In addition to its pharmaceutical applications, 3-Amino-4-hydroxybenzoic acid is also employed in the production of dyes and pigments, as well as in biochemical research for studying enzyme activity and metabolic pathways. Its ability to act as a pH indicator and its antioxidant properties further expand its utility in analytical chemistry and various industrial processes. Researchers and industry professionals benefit from its stability and ease of handling, making it a reliable choice for a wide range of applications.