4-Amino-2-chloropyrimidine-5-carbaldehyde is primarily used in the synthesis of various pharmaceutical compounds. It serves as a key intermediate in the production of drugs that target specific biological pathways, particularly in the development of antiviral and anticancer agents. The compound's structure allows it to be incorporated into molecules that inhibit enzymes or interfere with DNA/RNA replication, making it valuable in medicinal chemistry. Additionally, it is utilized in research settings for the design and optimization of new therapeutic candidates, contributing to advancements in drug discovery. Its reactivity also makes it a useful building block in organic synthesis for creating complex heterocyclic compounds.