(E)-3-Cyclopropylacrylic acid is primarily used in organic synthesis as a building block for the preparation of more complex molecules. It serves as a key intermediate in the development of pharmaceuticals, particularly in the synthesis of compounds with potential therapeutic properties. The cyclopropyl group in its structure is often exploited to enhance the stability and bioactivity of the resulting drugs. Additionally, this compound is utilized in the creation of agrochemicals, where its unique structure contributes to the effectiveness of pesticides or herbicides. Its application extends to materials science, where it is incorporated into polymers or coatings to impart specific chemical or physical properties. Overall, its versatility makes it a valuable component in various industrial and research contexts.