4-Amino-6-methylpyrimidine is primarily used as a key intermediate in the synthesis of various pharmaceutical compounds. It plays a significant role in the development of drugs, particularly those targeting metabolic and neurological disorders. The compound is also utilized in the production of agrochemicals, where it serves as a building block for creating pesticides and herbicides. Additionally, it finds application in organic chemistry research as a precursor for synthesizing more complex heterocyclic compounds, which are often explored for their potential biological activities. Its versatility in chemical reactions makes it valuable in both industrial and academic settings.