Biphenyl is widely used as an intermediate in the production of various industrial chemicals, including dyes, plastics, and pharmaceuticals. It serves as a heat transfer fluid in industrial processes due to its thermal stability. Additionally, it acts as a preservative in citrus fruit packaging to prevent fungal growth. In organic synthesis, biphenyl is a key building block for creating complex molecules, particularly in the development of liquid crystals for display technologies. In analytical chemistry, it is employed as a melting point standard due to its sharp and reproducible melting point around 69-71°C. Its versatility makes it a valuable compound in multiple industrial and scientific applications.