N-Nitroso Eltrombopag Impurity 3 is a nitrosamine-class degradation product associated with eltrombopag that requires rigorous identification and control due to potential genotoxicity. This impurity is characterized by its N-nitroso functionality, molecular mass and chromatographic behavior, and is routinely monitored using sensitive LC-MS/MS and high-resolution mass spectrometry methods for trace-level quantitation. Structural confirmation relies on accurate mass, fragmentation pattern and comparison to reference standards. Regulatory frameworks and ICH M7 guidance drive strict specification limits and risk-based mitigation strategies. Suppliers provide impurity profiles, analytical data and stability information to support quality, safety and regulatory submissions.
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