Beta-methylcinnamic acid is primarily utilized in the synthesis of organic compounds, particularly in the production of fragrances and flavoring agents. Its structure allows it to serve as a precursor in the creation of aromatic esters, which are commonly used in perfumes and food additives to impart pleasant scents and tastes. Additionally, it finds application in the pharmaceutical industry as an intermediate in the synthesis of various active pharmaceutical ingredients (APIs). Its role in organic synthesis extends to the development of UV absorbers and stabilizers in polymer chemistry, where it helps enhance the durability and performance of materials exposed to sunlight.