2-Amino-5-ethylpyrazine is used in the synthesis of pharmaceuticals, particularly as an intermediate in the production of certain antitubercular drugs. It also serves as a building block in the development of agrochemicals, contributing to the creation of herbicides and plant growth regulators. Its pyrazine ring structure supports the formation of more complex heterocyclic compounds valued in medicinal chemistry. Additionally, it finds use in research laboratories for designing new bioactive molecules due to its nitrogen-rich ring system.