Haloalkanes are organic compounds that consist of carbon, hydrogen, and halogen atoms. They are derived from alkanes, where one or more hydrogen atoms are replaced by halogen atoms such as fluorine, chlorine, bromine, or iodine. Haloalkanes can be classified as primary, secondary, or tertiary based on the carbon atom to which the halogen is attached. These compounds are commonly used in various applications, including solvents, refrigerants, and in the production of pharmaceuticals. Haloalkanes can also participate in chemical reactions, making them important intermediates in organic synthesis. Their properties and reactivity depend on the type and number of halogen atoms present.