Guanidine sulfamate is primarily used as a flame retardant in various materials, including textiles and plastics. Its ability to inhibit combustion makes it valuable in enhancing the fire safety of products. Additionally, it is employed in the synthesis of certain pharmaceuticals, where it acts as a reagent or intermediate in the production of active compounds. In agriculture, it serves as a herbicide, helping to control unwanted vegetation in crops. Its versatile properties also make it useful in the formulation of specialty chemicals for industrial applications.