Used as a reducing agent in electroless nickel plating processes, where it enables the deposition of nickel-phosphorus alloy coatings on metals and plastics without the need for an external electrical current. This chemical is key in creating uniform, corrosion-resistant, and wear-resistant coatings on components used in automotive, aerospace, and electronics industries. It is also utilized in catalysis and as a source of phosphorus in specialized chemical syntheses. Its role in generating active phosphorus species makes it valuable in controlled reduction reactions and in the preparation of functional surfaces requiring enhanced durability and lubricity.