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Pharmaceutical Impurity Reference Standards
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- Structure:

- Chemical Name:Tazobactam Impurity B
- CAS:115546-66-2
- MF:C10H12N4O5S
- Structure:

- Chemical Name:Brexpiprazole Impurity 20
- CAS:105685-34-5
- MF:C12H14N2O
- Chemical Name:Pralatrexate Impurity 13
- CAS:
- MF:
- Chemical Name:Pralatrexate Impurity 18
- CAS:
- MF:
- Chemical Name:Pitavastatin Impurity 50
- CAS:
- MF:
- Chemical Name:Pitavastatin Impurity 58
- CAS:
- MF:
- Chemical Name:Lenvatinib Impurity 41
- CAS:
- MF:
- Chemical Name:Tazobactam Impurity 12
- CAS:
- MF:
- Chemical Name:Tofacitinib Impurity 103
- CAS:
- MF:
- Chemical Name:Posaconazole impurity 69
- CAS:
- MF:
- Chemical Name:Crisaborole Impurity 3
- CAS:
- MF:
- Chemical Name:Canagliflozin Impurity 59
- CAS:
- MF:
- Chemical Name:Canagliflozin Impurity 64
- CAS:
- MF:
- Chemical Name:Hydroxychloroquine Impurity I
- CAS:
- MF:
- Chemical Name:Sitafloxacin Impurity 22
- CAS:
- MF:
- Chemical Name:Levetiracetam Impurity 24
- CAS:
- MF:
- Structure:

- Chemical Name:Selexipag Impurity 5
- CAS:2928611-79-2
- MF:C22H23N3O3
- Chemical Name:Levosimendan Impurity 11
- CAS:
- MF:
- Chemical Name:Cabozantinib impurity O
- CAS:
- MF:
- Structure:

- Chemical Name:(41S,12S,13aS)-12-(ethoxycarbonyl)-13a-ethyl-12-hydroxy-2,3,41,5,6,12,13,13a-octahydroindolo[3,2,1-de]pyrido[3,2,1-ij][1,5]naphthyridine 4(1H)-oxide
- CAS:52341-36-3
- MF:C22H28N2O4
- Chemical Name:Rotigotine Impurity 5
- CAS:
- MF:
- Chemical Name:Rotigotine Impurity 10
- CAS:
- MF:
- Structure:

- Chemical Name:(S)-2-cyclopentyl-2-hydroxy-2-phenylacetic acid
- CAS:64471-43-8
- MF:C13H16O3
- Chemical Name:Olprinone Impurity 6
- CAS:
- MF:
- Structure:

- Chemical Name:Trenbolone Acetate Process Impurity 4
- CAS:5218-51-9
- MF:C18H24O2
- Chemical Name:Cilastatin Impurity 6
- CAS:
- MF:
- Structure:

- Chemical Name:Sitagliptin Impurity 77
- CAS:382638-00-8
- MF:C11H21NO7S
- Chemical Name:Trimetazidine Impurity 6
- CAS:
- MF:
- Structure:

- Chemical Name:Oseltamivir Impurity 50
- CAS:651324-06-0
- MF:C24H42N2O3
- Structure:

- Chemical Name:Tamsulosin impurity 6
- CAS:
- MF:C20H28N2O5S
- Chemical Name:Flucloxacillin Impurity 6
- CAS:
- MF:
- Structure:

- Chemical Name:Ipratropium bromide Impurity 3
- CAS:
- MF:C20H29Br2NO3
- Chemical Name:Afatinib Impurity 54
- CAS:
- MF:
- Chemical Name:Aprepitant Impurity 32
- CAS:
- MF:
- Structure:

- Chemical Name:Atorvastatin Impurity 34
- CAS:
- MF:C66H68CaF2N4O10
- Chemical Name:Cabozantinib Impurity 2
- CAS:
- MF:
- Chemical Name:Cefathiamidine Impurity 7
- CAS:
- MF:
- Structure:

- Chemical Name:Empagliflozin Impurity 62
- CAS:1620758-30-6
- MF:C23H27ClO8
- Chemical Name:Emtricitabine Impurity 5
- CAS:
- MF:
- Chemical Name:Esomeprazole Impurity 42
- CAS:
- MF:
- Chemical Name:Gadobutrol Impurity 7
- CAS:
- MF:
- Structure:

- Chemical Name:Imatinib Impurity 27
- CAS:67013-55-2
- MF:C8H5Br2N
- Chemical Name:Isavuconazole Impurity 31
- CAS:
- MF:
- Chemical Name:Linagliptin Impurity 59
- CAS:
- MF:
- Chemical Name:Oseltamivir Impurity 56
- CAS:
- MF:
- Chemical Name:Palbociclib Impurity 38
- CAS:
- MF:
- Chemical Name:Pemetrexed Impurity 38
- CAS:
- MF:
- Chemical Name:Posaconazole Impurity 74
- CAS:
- MF:
- Chemical Name:Rabeprazole Impurity 21
- CAS:
- MF:
- Chemical Name:Sitagliptin Impurity 52
- CAS:
- MF:
- Chemical Name:Tafluprost Impurity 5
- CAS:
- MF:
- Chemical Name:Ticagrelor Impurity 112
- CAS:
- MF:
- Structure:

- Chemical Name:Ticagrelor Impurity 96
- CAS:1643413-84-6
- MF:C9H9F2N
- Chemical Name:Tofacitinib Impurity 116
- CAS:
- MF:
- Chemical Name:Tofacitinib Impurity 121
- CAS:
- MF:
- Chemical Name:Trelagliptin Impurity 28
- CAS:
- MF:
- Structure:

- Chemical Name:Vildagliptin Impurity 31
- CAS:119694-48-3
- MF:C10H14N4O6
- Chemical Name:Beclometasone Impurity M
- CAS:
- MF:
- Structure:

- Chemical Name:O-DESMETHYLCARVEDILOL
- CAS:72956-44-6
- MF:C23H24N2O4
- Structure:

- Chemical Name:Tolvaptan Impurity 7
- CAS:1432725-23-9
- MF:C26H26N2O3
- Chemical Name:Dexchlorpheniramine impurity E
- CAS:
- MF:
- Chemical Name:Diquafosol Impurity F
- CAS:
- MF:
- Chemical Name:Dasatinib iMpurity F
- CAS:
- MF:
- Chemical Name:Palbociclib Impurity 2
- CAS:
- MF:
- Chemical Name:Axitinib Impurity 6
- CAS:
- MF:
- Structure:

- Chemical Name:Levofloxacin Impurity 16
- CAS:
- MF:C18H20FN3O4
- Structure:

- Chemical Name:Venlafaxine Impurity 13
- CAS:727728-51-0
- MF:C17H27NO2
- Chemical Name:Erlotinib Impurity 20
- CAS:
- MF:
- Chemical Name:Febuxostat Impurity 42
- CAS:
- MF:
- Structure:

- Chemical Name:Pregabalin Impurity 11
- CAS:2375259-86-0
- MF:C8H16ClNO2
- Chemical Name:Ticagrelor Impurity 44
- CAS:
- MF:
- Chemical Name:Exemestane Impurity 2
- CAS:
- MF:
- Chemical Name:Empagliflozin Impurity 4
- CAS:
- MF:
- Chemical Name:Moxifloxacin Impurity 14
- CAS:
- MF:
- Chemical Name:2-Benzothiazolamine
- CAS:
- MF:
- Chemical Name:Cefodizime Impurity E
- CAS:
- MF:
- Chemical Name:Penicillin Impurity C
- CAS:
- MF:
- Chemical Name:Cefminox Sodium impurity C
- CAS:
- MF:
- Chemical Name:Cefotiam Impurity C
- CAS:
- MF:
- Structure:

- Chemical Name:Dequalinium EP Impurity B
- CAS:747387-02-6
- MF:C30H40N4+2
- Chemical Name:Peramivir Impurity F
- CAS:
- MF:
- Chemical Name:Lincomycin sulfoxide Impurity 4
- CAS:
- MF:
- Chemical Name:Sulpiride Impurity 3
- CAS:
- MF:
- Chemical Name:Doxofylline iMpurity F
- CAS:
- MF:
- Chemical Name:He pulls non-EP impurities D
- CAS:
- MF:
- Structure:

- Chemical Name:R-(-)-O-DESMETHYLVENLAFAXINE
- CAS:142761-11-3
- MF:C16H25NO2
- Structure:

- Chemical Name:5-HYDROXY LANSOPRAZOLE
- CAS:131926-98-2
- MF:C16H14F3N3O3S
- Structure:

- Chemical Name:(3S,5R)-4-[5-([1,1'-Biphenyl]-4-ylmethyl)-3-methyl-2-oxopyrrolidin-1-yl]-4-oxobutanoic acid
- CAS:
- MF:C22H23NO4
- Structure:

- Chemical Name:Ethyl (2R,4S)-4-([1,1'-biphenyl]-4-ylmethyl)-4-[4-(propan-2-yloxy)-4-oxobutanamido]-2-methylbutanoate
- CAS:
- MF:C27H35NO5
- Structure:

- Chemical Name:Ticagrelor Impurity N
- CAS:1643378-47-5
- MF:C23H29FN6O4S
- Structure:

- Chemical Name:carbamic acid, n-[(1r,2r,5s)-5-[(dimethylamino)carbonyl]-2-hydroxycyclohexyl]-, 1,1-dimethylethyl ester
- CAS:929693-30-1
- MF:C14H26N2O4
- Chemical Name:Valaciclovir iMpurity
- CAS:
- MF:
- Chemical Name:Erlotinib hydrochloride Impurity C
- CAS:
- MF:
- Chemical Name:Linagliptin Impurity B
- CAS:
- MF:
- Chemical Name:Parecoxib Impurity A
- CAS:
- MF:
- Chemical Name:Parecoxib Impurity F
- CAS:
- MF:
- Structure:

- Chemical Name:2-(4-Benzhydrylpiperazino)ethyl acetoacetate
- CAS:89226-49-3
- MF:C23H28N2O3
- Structure:

- Chemical Name:Axitinib Impurity a
- CAS:1347304-18-0
- MF:C22H18N4O2S
- Structure:

- Chemical Name:Cycloocta[b]pyridine, 4-(4-fluorophenyl)-5,6,7,8,9,10-hexahydro-2-(1-piperazinyl)-
- CAS:132811-84-8
- MF:C21H26FN3
- Chemical Name:Linagliptin Impurity W
- CAS:
- MF: