Ethyl 4-chlorophenylacetate is utilized as a versatile intermediate in organic synthesis, particularly for pharmaceuticals including non-steroidal anti-inflammatory drugs (NSAIDs) and other bioactive molecules. The presence of the 4-chlorophenyl group and ester functionality enables facile modifications in multi-step reactions, rendering it invaluable in medicinal chemistry. It is also applied in the synthesis of fragrances, flavoring agents, and agrochemicals, leveraging its aromatic and ester properties. In research, it serves as a building block for developing novel compounds with therapeutic potential.