Manganese hypophosphite monohydrate is primarily used as a flame retardant in various polymer systems. It works by promoting char formation and reducing the release of flammable gases during combustion, thereby enhancing the fire resistance of materials. This chemical is often incorporated into plastics, coatings, and textiles to improve their safety in applications where fire hazards are a concern. Additionally, it serves as a stabilizer in certain chemical processes, helping to prevent unwanted degradation of materials. Its role in enhancing thermal stability and fire safety makes it valuable in industries such as electronics, construction, and automotive manufacturing.