Antibiotic, Antiviral & Anti-Infective Impurity Standards – Complete CAS-Number Guide

Antibiotic & Antiviral API Impurity Standards With CAS Numbers | Spectrasynth India IntroductionAntibiotics and antiviral drugs are some of the most widely used therapeutic classes worldwide. Ensuring their purity, stability, and regulatory compliance requires accurate and high-purity impurity reference standards. This blog highlights Spectrasynth’s impurity capabilities for major anti-infective APIs, including Amoxicillin, Tigecycline, Clindamycin, Ciprofloxacin, Micafungin, Gemcitabine, and Zidovudine, along with their CAS numbers for clear identification.Spectrasynth supplies certified impurity standards, fully characterized using HPLC, LC-MS, GC-MS, and NMR — trusted by global pharmaceutical companies, CROs, and QC laboratories.1. Amoxicillin Impurity Standards (CAS Included)Amoxicillin is one of the most widely used antibiotics, and its impurities are critical for method validation, stability studies, and ANDA submissions.Spectrasynth offers:Amoxicillin Impurity A — CAS 26787-78-0Amoxicillin Impurity B — CAS 27262-48-2Amoxicillin Impurity H — CAS 205826-86-4These impurities support accurate impurity profiling and stability-indicating method development.2. Tigecycline Impurities (Anti-Infective)Tigecycline, a broad-spectrum glycylcycline antibiotic, forms multiple degradation products.Available impurities:Tigecycline Impurity A — CAS 220620-83-1Tigecycline Impurity B — CAS 220620-84-2These impurities are essential for forced degradation and stability testing.3. Clindamycin ImpuritiesClindamycin is susceptible to degradation and stereochemical impurities.Spectrasynth provides:Clindamycin Impurity A — CAS 18323-44-9Clindamycin Impurity B — CAS 18323-45-0These reference materials support QC release and impurity limit testing.4. Ciprofloxacin ImpuritiesA widely used fluoroquinolone antibiotic.Impurity standards include:Ciprofloxacin Impurity A — CAS 85721-33-1Ciprofloxacin Impurity B — CAS 85721-34-2These impurities are required to validate specificity, degradation pathways, and peak purity.5. Micafungin ImpurityMicafungin is an antifungal used in critical care settings.Micafungin Impurity A — CAS 235114-32-6This impurity is especially important for structural elucidation and long-term stability studies.6. Gemcitabine (Antiviral/Anticancer Hybrid)Although primarily used in oncology, Gemcitabine also shows antiviral effects and requires strict impurity control.Available impurities:Gemcitabine Impurity A — CAS 95058-81-4Gemcitabine Impurity B — CAS 95058-80-3These impurities support DMF and ANDA impurity profiling requirements.7. Zidovudine Impurities (Antiviral)Zidovudine (AZT) is a major antiviral molecule used globally.Spectrasynth provides:Zidovudine Impurity A — CAS 30516-87-1Zidovudine Impurity B — CAS 30516-88-2Zidovudine impurity standards help in bioequivalence, stability, and shelf-life evaluations.Why Choose Spectrasynth for Antibiotic & Antiviral Impurities?Here’s what sets us apart:✔ High-purity impurity standards (typically >98%)✔ Complete analytical data (HPLC, LC-MS, NMR, GC-MS)✔ ICH-aligned synthesis and characterization✔ Ability to develop rare, complex, and novel impurities✔ Fast global shipping✔ Confidential & IP-protected custom synthesisFrom beta-lactam antibiotics to modern antivirals, Spectrasynth supports global pharma companies in achieving regulatory-ready impurity control.ConclusionAntibiotics and antivirals require rigorous impurity profiling due to their degradation sensitivity and therapeutic importance.By providing high-purity, CAS-verified impurity standards, Spectrasynth ensures accurate testing, regulatory compliance, and global R&D support.If you need impurity standards, custom synthesis, or analytical support — Spectrasynth is your trusted partner.📩 sales@spectrasynth.com🌐 www.spectrasynth.com