Guanylurea phosphate is widely used as a flame retardant in various materials, particularly in textiles and polymers. It is effective in reducing the flammability of these materials by promoting char formation and reducing the release of flammable gases during combustion. Additionally, it is utilized in the production of fire-resistant coatings and foams, enhancing safety in applications such as furniture, insulation, and protective clothing. Its non-toxic nature and compatibility with other materials make it a preferred choice in industries prioritizing both safety and environmental considerations.