1-Chloropentan-2-one is primarily used as an intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. It serves as a building block for creating more complex molecules due to its reactive chlorine and ketone functional groups. In the pharmaceutical industry, it is utilized in the synthesis of active pharmaceutical ingredients (APIs) and other fine chemicals. Additionally, it finds application in the development of pesticides and herbicides, where it contributes to the creation of compounds that target specific pests or weeds. Its role in chemical research and development is also significant, as it aids in the study of reaction mechanisms and the creation of novel compounds.