Alkyl halides are aliphatic hydrocarbons that have undergone halogenation, the process of attaching one or more halogen atoms. They can cause mild to severe irritation of the skin and respiratory tract. Exposure can also lead to nausea, vomiting, coma, convulsions, hypotension, and death. Alkyl halides are used in dry cleaning, degreasing, anesthetics, refrigerants, and pesticides. They are also used in embalming fluids due to their ability to slow decomposition when refrigerated.