Disodium anthraquinone-2,6-disulfonate is primarily used as a catalyst in the production of hydrogen peroxide through the anthraquinone process. In this method, it facilitates the cyclic reduction and oxidation of anthraquinone derivatives, enabling efficient and large-scale synthesis of hydrogen peroxide. Additionally, it finds application in textile dyeing and printing processes, where it acts as an intermediate or auxiliary agent to enhance color fixation and improve dye stability. Its water-soluble properties make it suitable for use in aqueous systems, particularly in industries requiring precise and controlled chemical reactions.