Used as an intermediate in the synthesis of dyes and pigments, particularly for producing azo dyes that exhibit good light and wash fastness. It imparts solubility and stability during dye manufacturing due to its sulfonate groups. Also employed in the formulation of concrete plasticizers to improve workability without increasing water content. Finds use in some electroplating processes as a buffering and complexing agent. Additionally, it serves as a building block in organic synthesis for creating specialty chemicals with aromatic frameworks.