Chlorobenzenes are a group of organic compounds that consist of a benzene ring with one or more chlorine atoms attached. They are colorless liquids with a sweet odor and are primarily used as solvents and intermediates in the production of various chemicals, including pesticides and pharmaceuticals. These compounds can be classified based on the number of chlorine atoms present, such as monochlorobenzene, dichlorobenzene, and trichlorobenzene. While chlorobenzenes have industrial applications, they can also pose environmental and health risks, as they are persistent in the environment and can be toxic to aquatic life and humans.