4-Heptylbenzoic acid finds its primary application in the field of organic synthesis, where it serves as a key intermediate in the production of liquid crystals. These liquid crystals are essential components in the manufacture of display technologies, such as LCDs (liquid crystal displays), used in televisions, computer monitors, and smartphones. The compound's structure, featuring a long alkyl chain and a benzoic acid group, makes it suitable for aligning molecules in a specific orientation, which is crucial for the proper functioning of liquid crystal materials. Additionally, it is utilized in research and development for creating novel organic compounds with potential applications in materials science and electronics.