6-Amino-5-iodonicotinic acid is primarily used in pharmaceutical research and development. It serves as a key intermediate in the synthesis of various bioactive compounds, particularly those targeting therapeutic areas such as oncology and infectious diseases. The compound's structure allows for further functionalization, making it valuable in the creation of novel drug candidates. Additionally, it is utilized in organic synthesis to develop complex molecules with potential applications in medicinal chemistry. Its iodine moiety also makes it a useful precursor in radiolabeling studies for imaging and diagnostic purposes.