19-Bromononadecanoic acid is primarily used in research and development, particularly in the field of organic synthesis. It serves as a key intermediate in the preparation of various long-chain fatty acid derivatives, which are essential for studying lipid metabolism and membrane biology. The compound is also utilized in the synthesis of surfactants and emulsifiers, contributing to the formulation of industrial and household cleaning products. Additionally, it finds application in the development of pharmaceuticals, where it acts as a building block for creating bioactive molecules with potential therapeutic properties. Its bromine moiety makes it a valuable reagent for further functionalization in chemical reactions, enabling the creation of more complex structures.