Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals. It serves as a building block in the production of certain herbicides and plant growth regulators due to its structural similarity to auxins. Its chlorinated aromatic ring enhances stability and bioactivity, making it valuable in crop protection formulations. Also investigated for use in the development of anti-inflammatory and antimicrobial agents, where the trans-cinnamic acid core contributes to biological activity.