Used primarily as a reducing agent in various chemical reactions, it plays a crucial role in the synthesis of organic compounds, particularly in the production of pharmaceuticals and agricultural chemicals. It is also employed in the preparation of blowing agents for plastics, helping to create lightweight and porous materials. In analytical chemistry, it serves as a reagent for the detection and determination of certain metals and ions. Additionally, it finds application in the treatment of water and wastewater, aiding in the removal of heavy metals and other contaminants. Its use in fuel cells and batteries is also notable, where it acts as a component in electrolyte solutions to enhance performance.