Antimony pentoxide is a chemical compound with the formula Sb2O5. It appears as a white or yellowish powder and is primarily used as a flame retardant in various materials, including plastics and textiles. Its ability to inhibit combustion makes it valuable in enhancing the safety of products. In addition to its use in flame retardants, antimony pentoxide serves as a catalyst in certain chemical reactions and is involved in the production of glass and ceramics. It is important to handle this compound with care, as it can be toxic if ingested or inhaled.