Used as a reducing agent in analytical chemistry, particularly in the standardization of potassium permanganate solutions. It plays a key role in redox titrations due to its ability to react predictably with oxidizing agents. Also employed in the removal of calcium from blood samples in medical testing, preventing coagulation during certain laboratory analyses. In industry, it serves in the extraction and purification of rare earth elements, where it aids in precipitation processes. Additionally, used in textile processing for bleaching and as a component in cleaning formulations for metal surfaces.