Hypophosphorous acid is widely used in the reduction of metal ions to produce electroless metal plating, particularly for nickel and copper coatings on various substrates. It serves as a key component in the formulation of plating baths, ensuring a uniform and durable metal layer. Additionally, it acts as a reducing agent in organic synthesis, facilitating the conversion of certain functional groups in chemical reactions. In the pharmaceutical industry, it is employed as a stabilizer and intermediate in the production of specific drugs. Its antioxidant properties also make it useful in preventing the degradation of materials susceptible to oxidation. Furthermore, it finds application in water treatment processes to control scale formation and corrosion in industrial systems.