4-Methoxycinnamic acid, identified by CAS number 830-09-1, is a substituted cinnamic acid derivative characterized by a methoxy group at the para position of the benzene ring. It typically appears as a white to pale yellow crystalline powder. As an organic compound, it serves as a foundational building block in various chemical syntheses due to its reactive carboxylic acid group and the electron-donating properties of the methoxy substituent.
In industrial and research settings, this compound is valued for its stability and its role as a precursor to more complex molecules. It is frequently utilized in the development of UV-filtering agents and specialty chemicals. Proper handling involves standard laboratory precautions, including the use of personal protective equipment and storage in a cool, dry environment to maintain its chemical integrity over time.