(2-Carboxyethyl)dimethylsulfonium Bromide is a specialty chemical reagent primarily employed in organic synthesis. It serves as a precursor for generating sulfonium ylides, which are key intermediates in reactions such as the Corey-Chaykovsky reaction for synthesizing epoxides, aziridines, and cyclopropanes from aldehydes and ketones. This compound is valuable in medicinal chemistry for constructing complex molecular scaffolds in drug development. Additionally, it finds applications in advanced materials research, including the modification of polymers to enhance functional properties like reactivity or solubility.