Baloxavir Impurity 51
Baloxavir Impurity 51 (CAS 2136287-61-9) is a defined related substance of the antiviral drug baloxavir marboxil, identified by its specific structure and CAS registry number as a process-related impurity of the influenza treatment. It is supplied as a reference-standard-grade solid, typically in milligram quantities under catalogue numbers such as C4X-210851, and it is intended solely for analytical and research use rather than human or veterinary administration. Because baloxavir marboxil is a synthetic small molecule with a fused tricyclic core and a relatively long manufacturing route, its impurity profile includes many closely related structures that must be controlled to pharmacopoeial limits. This material allows quality-control laboratories to identify, characterise and quantify one such impurity with confidence during drug substance and finished-product testing. FLAG: listed by suppliers as Baloxavir Impurity 51 under this CAS; the exact structure was not independently confirmed in the references retrieved.
1. Reference standard for impurity control: used to identify, characterise and quantify the corresponding impurity in baloxavir marboxil active pharmaceutical ingredient and in finished film-coated tablet products.
2. Analytical method development: essential for establishing retention times, relative response factors, resolution, linearity and detection limits in liquid chromatography and mass spectrometry impurity methods.
3. Regulatory compliance: supports specification setting, stability-indicating studies, batch release testing and pharmacopoeial or in-house monograph requirements for the antiviral product under applicable quality guidance.
4. Handling and storage: for laboratory use only; keep sealed in a cool, dry place away from light and moisture, prepare solutions fresh as required and dispose of as regulated chemical waste. It carries no therapeutic indication and must never be administered to humans or animals.
5. Verification note: FLAG: listed by suppliers as Baloxavir Impurity 51 under this CAS; the exact structure was not independently confirmed in the references retrieved.
Product Name: Baloxavir Impurity 51
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