N-Nitroso Nortriptyline Impurity is primarily used as a reference standard and analytical impurity standard in pharmaceutical research quality control and analytical method development.

Its purpose is to help identify detect characterize and quantify N-nitroso nortriptyline-related impurities in nortriptyline drug substances or drug products particularly during impurity profiling and nitrosamine risk assessment.

N-Nitroso Nortriptyline Impurity is a nitrosamine-related impurity of nortriptyline formed when the secondary amine functionality of nortriptyline undergoes N-nitrosation.