N-nitrosodiethylamine (NDEA) is a chemical compound classified as a nitrosamine. It is formed by the reaction of diethylamine with nitrous acid. NDEA is primarily used in laboratory research and has been studied for its potential carcinogenic effects in animals. Exposure to NDEA can occur through various routes, including ingestion, inhalation, or skin contact. It is important to handle this compound with care, as it has been linked to an increased risk of certain types of cancer in laboratory studies. Regulatory agencies monitor its presence in the environment and food products.