Ethyl 7-chloroquinoline-3-carboxylate is primarily used in the synthesis of pharmaceutical compounds, particularly in the development of antimalarial drugs. Its structure serves as a key intermediate in creating quinoline derivatives, which are known for their therapeutic properties. Additionally, it is utilized in organic chemistry research for constructing complex molecules due to its reactive carboxylate and chloro groups. The compound also finds application in the study of fluorescence and photophysical properties, contributing to advancements in materials science.