Used as a reducing agent in redox titrations, particularly in the standardization of potassium permanganate solutions. It plays a key role in analytical chemistry due to its ability to provide accurate and reproducible results in volumetric analysis. Also employed in the removal of rust and scale from metal surfaces, as it effectively chelates iron ions. In some industrial processes, it serves as a precipitating agent for calcium and rare earth metals. Additionally, used in textile processing for bleaching and cleaning fabrics.