Used primarily in electrical equipment, it serves as a dielectric fluid in capacitors and transformers, enhancing their performance and longevity. Its application extends to heat transfer systems due to its thermal stability, making it suitable for use in industrial cooling processes. Additionally, it has been utilized in hydraulic systems and as a plasticizer in certain polymers, improving flexibility and durability. However, its use has declined due to environmental and health concerns, leading to stricter regulations and the development of safer alternatives.