(Phenylthio)acetonitrile is primarily utilized in organic synthesis as a versatile intermediate. Its application is notable in the production of pharmaceuticals, where it serves as a key building block for the synthesis of various active compounds. Additionally, it is employed in the development of agrochemicals, contributing to the creation of pesticides and herbicides. The compound's reactivity makes it valuable in the preparation of sulfur-containing organic molecules, which are often used in materials science for creating polymers and other advanced materials. Its role in facilitating complex chemical reactions underscores its importance in industrial and research settings.