Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals. Its reactivity allows for the introduction of the pyrazine ring into larger molecules, enhancing biological activity. Commonly employed in the preparation of fungicides and herbicides due to the pyrazine moiety's role in disrupting pest metabolic pathways. Also utilized in the development of active ingredients in crop protection agents. Serves as a building block in medicinal chemistry for creating kinase inhibitors and other bioactive compounds. Its acyl chloride group readily reacts with amines and alcohols, making it valuable for constructing amide and ester linkages in complex molecules.