4,4’-Dithiobisbenzoic acid is primarily used as a building block in organic synthesis, particularly in the creation of complex molecules. It serves as a key intermediate in the production of pharmaceuticals, where it is utilized to develop compounds with potential therapeutic properties. Additionally, it finds application in the field of materials science, contributing to the synthesis of polymers and advanced materials with specific functional properties. Its disulfide linkage makes it valuable in cross-linking reactions, enhancing the stability and durability of the resulting materials. In research, it is often employed to study redox processes and to develop novel chemical entities with tailored functionalities.