Malonitrile is widely used in organic synthesis as a building block for various heterocyclic compounds. It serves as a key intermediate in the production of pharmaceuticals, particularly in the synthesis of antiviral and anticancer agents. Additionally, it is utilized in the manufacture of dyes and pigments, contributing to vibrant colorants for textiles and other materials. In agrochemicals, malonitrile plays a role in creating pesticides and herbicides, aiding in crop protection. Its reactivity also makes it valuable in polymer chemistry, where it is incorporated into specialty resins and coatings. Furthermore, malonitrile is employed in analytical chemistry as a reagent for detecting specific functional groups in complex molecules.