The regulatory scrutiny around nitrosamine impurities shows no signs of slowing down. Since the landmark valsartan recalls of 2018, health authorities worldwide have systematically expanded the scope of nitrosamine risk assessment across a growing list of APIs. Today, fluoroquinolone antibiotics are firmly within that scope — and Levofloxacin is no exception.
Understanding N-Nitroso N-Desmethyl Levofloxacin
N-Nitroso N-Desmethyl Levofloxacin is a strategically important nitrosamine impurity associated with Levofloxacin — the widely used fluoroquinolone antibiotic. With a molecular formula of C₁₇H₁₇FN₄O₅ and a molecular weight of 376.34 g/mol, it belongs to the category of Nitrosamine Working Standards and Pharmaceutical Impurities.
Its trace-level occurrence does not diminish its toxicological significance — regulatory agencies classify many nitrosamines as probable human carcinogens under ICH M7 guidelines, with acceptable intake limits set at parts-per-billion or sub-ppb levels — demanding analytical methods of exceptional sensitivity and precision.
ADVENT's Achievement: Precision Through Complex Synthesis
ADVENT's development of N-Nitroso N-Desmethyl Levofloxacin involved a carefully controlled multi-step synthetic approach — beginning with the preparation of the synthetically challenging N-Desmethyl Levofloxacin intermediate, followed by controlled nitrosation to obtain the target nitrosamine impurity.
The material has been comprehensively characterised using:
HPLC — purity determination and chromatographic profiling
Mass Spectrometry (MS) — molecular weight verification
FT-IR Spectroscopy — functional group identification
¹H NMR Spectroscopy — definitive structural elucidation
Each batch is supported by a Certificate of Analysis (CoA) with potency values and full spectral documentation.
Applications Across the Analytical Workflow
Method Development & Validation per ICH M7 and ICH Q2(R2)
Nitrosamine impurity profiling across Levofloxacin product lifecycle
Routine Quality Control and batch release testing
Regulatory submission support for NDA, ANDA, and MAA filings
Ready to Support Your Programme
N-Nitroso N-Desmethyl Levofloxacin is available as a ready-stock item for prompt dispatch. For technical specifications, CoA access, or method development discussions, the ADVENT team is ready to engage.
In nitrosamine testing, the quality of your reference standard directly determines the quality of your result. Make it count.
