3-Methyl-1,2,4-triazin-5-amine is primarily used as a key intermediate in the synthesis of herbicides within agricultural chemical applications. Herbicides synthesized from this compound are essential for controlling weed growth in crops by inhibiting specific enzymes vital for plant survival. It is also employed in research and development to formulate new agrochemicals that enhance crop yield and resistance. Additionally, it supports studies in plant biochemistry, aiding in the exploration of herbicide action mechanisms and resistance development.