Halogenated compounds are organic molecules that contain one or more halogen atoms, which include fluorine, chlorine, bromine, iodine, and astatine. These compounds are often derived from hydrocarbons and can exhibit unique chemical properties due to the presence of halogens. They are commonly used in various applications, including solvents, refrigerants, and pharmaceuticals. The presence of halogens in these compounds can significantly affect their reactivity and stability. For example, chlorinated hydrocarbons are known for their use in industrial processes, while fluorinated compounds are often utilized in non-stick coatings. Understanding halogenated compounds is essential in fields like chemistry and environmental science.