N-Nitrosodipropylamine is primarily used in research settings as a reference standard in analytical chemistry for the detection and quantification of nitrosamines in various samples. It serves as a model compound to study the behavior, formation, and degradation of nitrosamines, which are known to be potential carcinogens. This chemical is also employed in toxicology studies to investigate the carcinogenic effects and mechanisms of nitrosamines on biological systems. Additionally, it is used in environmental monitoring to assess the presence of nitrosamine contamination in water, soil, and air, helping to evaluate potential risks to human health and the environment.