Tetrabromo-2-sulfobenzoic acid cyclic anhydride is primarily used as a flame retardant in various polymer systems. It is particularly effective in enhancing the fire resistance of plastics, coatings, and textiles. The compound works by releasing bromine radicals when exposed to heat, which interrupts the combustion process and reduces flammability. Additionally, it is utilized in the production of specialty chemicals where high thermal stability and flame-retardant properties are required. Its application is common in industries such as electronics, construction, and automotive, where fire safety is a critical concern.