Triethyltin bromide is primarily used in research and industrial applications as a reagent in organic synthesis, particularly in the preparation of organotin compounds. It serves as a catalyst or intermediate in various chemical reactions, including the production of polymers and plastics. In agriculture, it has been explored as a potential fungicide or pesticide due to its biocidal properties, though its use is limited due to toxicity concerns. Additionally, it is utilized in material science for surface modification and coating applications, enhancing the properties of certain materials. Its role in studying neurotoxic effects is also significant, as it is used in laboratory settings to model and understand neurological damage.