Diphenyl ether is widely used as a heat transfer fluid in industrial applications due to its high thermal stability and ability to operate at elevated temperatures. It is commonly employed in systems like heat exchangers, reactors, and other equipment where consistent temperature control is essential. Additionally, it serves as a solvent in various chemical reactions and processes, particularly in the production of dyes, perfumes, and pharmaceuticals. Its inert nature makes it suitable for use in high-temperature environments without significant degradation. Diphenyl ether is also utilized as a fragrance ingredient in soaps and cosmetics, providing a mild, floral scent. In the agricultural sector, it is sometimes incorporated into formulations for pesticides and herbicides. Its versatility and stability make it a valuable component in multiple industries.