5-Amino-2-chloroisonicotinamide is primarily used in pharmaceutical research and development as a key intermediate in the synthesis of various bioactive compounds. Its structure makes it valuable for creating molecules with potential therapeutic applications, particularly in the fields of oncology and infectious diseases. Researchers utilize it to develop inhibitors targeting specific enzymes or proteins involved in disease pathways. Additionally, it serves as a building block in the production of heterocyclic compounds, which are often explored for their medicinal properties. Its role in drug discovery highlights its importance in advancing new treatments for complex health conditions.