This chemical is primarily utilized in organic synthesis as a reagent for the formation of ylides, which are intermediates in various reactions, particularly the Wittig reaction. The Wittig reaction is widely employed to convert aldehydes and ketones into alkenes, making it valuable in the synthesis of complex organic molecules, including pharmaceuticals, natural products, and polymers. Its carboxybutyl group enhances solubility in polar solvents, facilitating its use in aqueous or mixed solvent systems. Additionally, it can serve as a phase-transfer catalyst in certain reactions, improving the efficiency of reactions between compounds in different phases. Its application in material science includes the modification of surfaces or polymers to introduce specific functional groups.