N-nitrosodimethylamine (NDMA) is a chemical compound that belongs to a class of substances known as nitrosamines. It is primarily formed through the reaction of dimethylamine and nitrous acid. NDMA is of interest due to its potential health risks, as it has been classified as a probable human carcinogen by the International Agency for Research on Cancer. NDMA can be found in various sources, including certain industrial processes, contaminated water, and some food products. Its presence in the environment raises concerns about exposure, particularly in drinking water supplies. Regulatory agencies monitor NDMA levels to ensure public safety and minimize health risks associated with this compound.