N-Nitroso Rifabutin is mainly used as a reference standard in pharmaceutical analysis impurity profiling and regulatory safety testing.

The main purpose of N-Nitroso Rifabutin is to help detect quantify and control potentially carcinogenic nitrosamine impurities in rifabutin drug products.

N-Nitroso Rifabutin is a nitrosamine-related impurity derived from the antibiotic rifabutin formed through nitrosation reactions under certain manufacturing or storage conditions.