Triammonium 4-sulfophthalate is primarily used in the dye and pigment industry as an intermediate in the synthesis of various dyes, particularly azo dyes. Its sulfonate group enhances water solubility, making it valuable in the production of water-based dyes and inks. Additionally, it finds application in the formulation of specialty chemicals, such as corrosion inhibitors and surfactants, due to its ability to interact with metal surfaces and improve stability in aqueous solutions. In the textile industry, it is utilized for dyeing processes, ensuring even color distribution and improved fastness properties. Its role in research and development includes serving as a precursor for advanced materials and organic compounds, contributing to innovations in polymer chemistry and material science.