This compound is primarily used as a key reagent in organic synthesis, particularly in the Wittig reaction, which is a widely employed method for the formation of alkenes. It facilitates the conversion of aldehydes and ketones into alkenes by generating a phosphonium ylide intermediate. This makes it valuable in the synthesis of complex organic molecules, including pharmaceuticals, agrochemicals, and fine chemicals. Additionally, its bromine substituent enhances its reactivity and selectivity in certain transformations, making it useful in the preparation of specific target compounds. Its application extends to materials science, where it can be used in the development of organic electronic materials and polymers.