Ethyl 9-Bromononanoate is primarily used as an intermediate in organic synthesis, particularly in the production of complex organic compounds. It plays a significant role in the synthesis of long-chain fatty acid derivatives and other specialty chemicals. The compound is also utilized in the development of pharmaceuticals, where it serves as a building block for active pharmaceutical ingredients (APIs). Additionally, it finds application in the research and development of new materials, including polymers and surfactants, due to its reactive bromine group, which allows for further functionalization. Its use in the field of agrochemicals is also notable, contributing to the synthesis of various crop protection agents.