Biphenyl is widely used in various industrial applications due to its unique chemical properties. It serves as a heat transfer fluid in high-temperature processes, particularly in industries where stable thermal conditions are essential, including as a dielectric coolant in electrical transformers. Additionally, biphenyl is employed as an intermediate in the production of plastics, resins, dyes, pesticides, herbicides, and other organic compounds. Its ability to act as a preservative (diphenyl) makes it useful in protecting citrus fruits during storage and transportation. In the electronics industry, biphenyl is utilized in the synthesis of liquid crystals, which are critical components in displays and screens. Its stability and low reactivity also make it a suitable solvent in certain chemical reactions. It can also serve as an antioxidant in lubricants and cooling fluids.