2-(Ethylthio)pyrimidine-4,6-diamine is primarily used in the field of organic synthesis and pharmaceutical research. It serves as a key intermediate in the development of various bioactive compounds, particularly in the synthesis of antiviral and anticancer agents. Its pyrimidine core structure is essential for creating molecules that can interact with biological targets, such as enzymes or DNA, to inhibit their function. This compound is also explored in the design of novel drugs due to its potential to enhance therapeutic efficacy and reduce side effects. Additionally, it finds application in agrochemical research for the development of pesticides or herbicides, leveraging its chemical properties to target specific pests or weeds effectively.