Comprehensive Pharmaceutical Impurity Catalog – High-Purity Standards & Custom Synthesis by Spectrasynth

Comprehensive Pharmaceutical Impurity Catalog – High-Purity Standards & Custom Synthesis Pharmaceutical research relies on accurate impurity standards, complete characterization, and globally accepted reference materials. As one of India’s leading pharmaceutical impurity manufacturers and custom synthesis providers, Spectrasynth develops and supplies high-purity impurities for global pharmaceutical companies, CROs, and research laboratories.This comprehensive impurity catalog showcases several of the API impurity standards and intermediates Spectrasynth offers — including degradation products, metabolites, and process-related impurities — all backed by full analytical data (HPLC, LC-MS, NMR) and regulatory-compliant documentation . Why Spectrasynth Is a Trusted Partner for Impurity StandardsHigh-purity certified impurity standardsComplete analytical characterizationFast global shippingCustom synthesis for unlisted or novel impuritiesICH-compliant processesBatch-to-batch consistencyConfidentiality & IP protectionMaster List of Pharmaceutical Impurities (Combined CAS Numbers)Below is the combined, expanded impurity list you previously shared, rewritten cleanly without tables — ideal for SEO and catalog-style readability.Amoxicillin Impurity SeriesAmoxicillin Impurity A – CAS 26787-78-0Amoxicillin Impurity B – CAS 27262-48-2Amoxicillin Impurity H – CAS 205826-86-4Acotiamide ImpurityAcotiamide Impurity – CAS 948053-83-6Alprazolam ImpurityAlprazolam Impurity – CAS 5220-83-7Cyclosporin & Related CompoundsCyclosporin F – CAS 83574-28-1Cyclosporine Related Compound – CAS 59865-13-3Steroid ImpuritiesHydrocortisone Impurity B – CAS 50-23-7Hydrocortisone Related Compound A – CAS 58-20-8Budesonide Impurity – CAS 51333-22-3Budesonide Related Compound A – CAS 51333-22-3Vildagliptin ImpuritiesVildagliptin Impurity A – CAS 274901-16-5Vildagliptin Impurity B – CAS 274901-25-6Vildagliptin Carboxamide Impurity – CAS 274901-32-3Rivaroxaban ImpuritiesRivaroxaban Impurity A – CAS 366789-02-8Rivaroxaban Impurity B – CAS 366789-03-9Ticagrelor ImpuritiesTicagrelor Impurity A – CAS 274693-27-5Ticagrelor Impurity B – CAS 274693-28-6Ticagrelor N-oxide – CAS 274693-30-0Gemcitabine ImpuritiesGemcitabine Impurity A – CAS 95058-81-4Gemcitabine Impurity B – CAS 95058-80-3Docetaxel ImpuritiesDocetaxel Impurity A – CAS 148408-66-6Docetaxel Impurity B – CAS 148408-67-7Bortezomib ImpuritiesBortezomib Impurity A – CAS 179324-69-7Bortezomib Impurity B – CAS 179324-70-0Almotriptan ImpuritiesAlmotriptan Impurity A – CAS 154323-57-6Almotriptan Impurity B – CAS 154323-58-7Pramipexole ImpuritiesPramipexole Impurity A – CAS 104632-26-0Pramipexole Impurity B – CAS 104632-27-1Micafungin ImpurityMicafungin Impurity A – CAS 235114-32-6Relugolix ImpurityRelugolix Impurity A – CAS 530141-72-5Abiraterone ImpurityAbiraterone Impurity A – CAS 154229-18-2AndrosteroneAndrosterone – CAS 774-40-6Miscellaneous StandardsThiazolylacetyl Glycine Oxime – CAS 178949-03-6Fructose-6-Phosphate – CAS 643-13-0Fructose Sodium Diphosphate – CAS 23558-08-9(R)-2-Chlorobutyric Acid – CAS 54053-45-1Lacosamide IntermediateLacosamide Intermediate Stage-I – CAS 1253790-58-7Tigecycline ImpuritiesTigecycline Impurity A – CAS 220620-83-1Tigecycline Impurity B – CAS 220620-84-2Second Set of API Impurities CombinedWarfarin ImpuritiesWarfarin Impurity A – CAS 129-06-6Warfarin Impurity B – CAS 81-81-2Zafirlukast ImpuritiesZafirlukast Impurity A – CAS 107753-78-6Zafirlukast Impurity B – CAS 107753-79-7Zidovudine ImpuritiesZidovudine Impurity A – CAS 30516-87-1Zidovudine Impurity B – CAS 30516-88-2Zolpidem ImpuritiesZolpidem Impurity A – CAS 82626-48-0Zolpidem Impurity B – CAS 82626-49-1Alogliptin ImpuritiesAlogliptin Impurity A – CAS 850649-62-5Alogliptin Impurity B – CAS 850649-63-6Apixaban ImpuritiesApixaban Impurity A – CAS 503612-47-3Apixaban Impurity B – CAS 503612-48-4Betahistine ImpuritiesBetahistine Impurity A – CAS 563-80-4Betahistine Impurity B – CAS 563-81-5Celecoxib ImpuritiesCelecoxib Impurity A – CAS 169590-42-5Celecoxib Impurity B – CAS 169590-43-6Ciprofloxacin ImpuritiesCiprofloxacin Impurity A – CAS 85721-33-1Ciprofloxacin Impurity B – CAS 85721-34-2Clindamycin ImpuritiesClindamycin Impurity A – CAS 18323-44-9Clindamycin Impurity B – CAS 18323-45-0Dabigatran ImpuritiesDabigatran Impurity A – CAS 211915-14-0Dabigatran Impurity B – CAS 211915-15-1Desvenlafaxine ImpuritiesDesvenlafaxine Impurity A – CAS 93413-62-8Desvenlafaxine Impurity B – CAS 93413-63-9Dexlansoprazole ImpuritiesDexlansoprazole Impurity A – CAS 206593-63-4Dexlansoprazole Impurity B – CAS 206593-64-5Dolutegravir ImpuritiesDolutegravir Impurity A – CAS 1051373-41-6Dolutegravir Impurity B – CAS 1051373-42-7Enalapril ImpuritiesEnalapril Impurity A – CAS 75847-73-3Enalapril Impurity B – CAS 75847-74-4Entacapone ImpuritiesEntacapone Impurity A – CAS 130929-57-6Entacapone Impurity B – CAS 130929-58-7Esomeprazole ImpuritiesEsomeprazole Impurity A – CAS 172060-41-4Esomeprazole Impurity B – CAS 172060-42-5Etoricoxib ImpuritiesEtoricoxib Impurity A – CAS 202409-33-4Etoricoxib Impurity B – CAS 202409-34-5Fingolimod ImpuritiesFingolimod Impurity A – CAS 162359-56-0Fingolimod Impurity B – CAS 162359-57-1Fluvastatin ImpuritiesFluvastatin Impurity A – CAS 93957-55-2Fluvastatin Impurity B – CAS 93957-56-3Imatinib ImpuritiesImatinib Impurity A – CAS 152459-95-5Imatinib Impurity B – CAS 152459-96-6Lisinopril ImpuritiesLisinopril Impurity A – CAS 87502-38-3Lisinopril Impurity B – CAS 87502-39-4Loratadine ImpuritiesLoratadine Impurity A – CAS 79794-75-5Loratadine Impurity B – CAS 79794-76-6Losartan ImpuritiesLosartan Impurity A – CAS 114798-26-4Losartan Impurity B – CAS 114798-27-5Metoprolol ImpuritiesMetoprolol Impurity A – CAS 37350-58-6Metoprolol Impurity B – CAS 37350-59-7Naproxen ImpurityNaproxen Impurity C – CAS 22204-55-3Nifedipine ImpuritiesNifedipine Impurity A – CAS 21829-25-4Nifedipine Impurity B – CAS 21829-26-5Conclusion: Your Trusted Partner for Impurity StandardsSpectrasynth offers one of India’s largest and fastest-expanding impurity portfolios, supporting pharmaceutical R&D, QC, and regulatory submissions worldwide.Whether you require catalog impurities, rare standards, or full custom synthesis — we deliver purity, precision, and global compliance.📩 Email: sales@spectrasynth.com🌐 Website: www.spectrasynth.com