3-Bromopropionitrile is primarily used as an intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. It serves as a key building block for the synthesis of various compounds, including active pharmaceutical ingredients (APIs) and crop protection agents. Its reactivity allows for the introduction of functional groups into complex molecules, making it valuable in the development of new drugs and agricultural chemicals. Additionally, it is utilized in research settings for the preparation of specialized organic compounds, contributing to advancements in medicinal chemistry and material science.