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Pharmaceutical Impurity Reference Standards
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- Chemical Name:
- Cefminox Sodium impurity B
- Chemical Name:
- Cefotiam Impurity B
- Structure:
- Chemical Name:
- pranoprofen impurity 11
- CAS:
- 52549-44-7
- MF:
- C15H13NO4
- Structure:
- Chemical Name:
- Atorvastatin Calcium Hydrate impurity 32
- CAS:
- 2088732-01-6
- MF:
- C14H27NO4
- Chemical Name:
- Cefazolin Impurity 5
- Chemical Name:
- Peramivir Impurity E
- Chemical Name:
- Lincomycin sulfoxide Impurity 3
- Chemical Name:
- Lincomycin sulfoxide Impurity F
- Chemical Name:
- Fasudil iMpurity F
- Structure:
- Chemical Name:
- 1-cyclopropyl-8-ethoxy-6-fluoro-7-((4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid hydrochloride
- CAS:
- 2252446-70-9
- MF:
- C22H27ClFN3O4
- Chemical Name:
- Doxofylline iMpurity E
- Structure:
- Chemical Name:
- Mupirocin Impurity 3
- MF:
- C26H44O9
- Structure:
- Chemical Name:
- 3,4-DICHLOROBENZYLAMINE HYDROCHLORIDE
- CAS:
- 49552-34-3
- MF:
- C7H8Cl3N
- Structure:
- Chemical Name:
- Methyl-5-chlorothiophene-2-carboxylate
- CAS:
- 35475-03-7
- MF:
- C6H5ClO2S
- Structure:
- Chemical Name:
- 2-Methyl-4-nitro-1H-imidazole-1-acetic acid
- CAS:
- 16230-87-8
- MF:
- C6H7N3O4
- Structure:
- Chemical Name:
- Benzofuran-5-carboxylic acid
- CAS:
- 90721-27-0
- MF:
- C9H6O3
- Structure:
- Chemical Name:
- 7-Chloro-1,6,7,8-tetradeoxy-6-[[[(2S)-1-methyl-4β-propyl-2α-pyrrolidinyl]carbonyl]amino]-1-(methylsulfinyl)-α-L-threo-D-galacto-octopyranose
- CAS:
- 22431-46-5
- MF:
- C18H33ClN2O6S
- Structure:
- Chemical Name:
- 2-(Propylthio)-4(1H)-pyrimidinone
- CAS:
- 54460-95-6
- MF:
- C7H10N2OS
- Structure:
- Chemical Name:
- (R)-3-((R)-5-(4-fluorophenyl)-5-hydroxypentanoyl)-4-phenyloxazolidin-2-one
- CAS:
- 1612153-32-8
- MF:
- C20H20FNO4
- Structure:
- Chemical Name:
- (S)-3-((R)-5-(4-fluorophenyl)-5-hydroxypentanoyl)-4-phenyloxazolidin-2-one
- CAS:
- 528565-93-7
- MF:
- C20H20FNO4
- Chemical Name:
- Posaconazole iMpurity 3
- Structure:
- Chemical Name:
- Bezafibrate Impurity D
- CAS:
- 41859-58-9
- MF:
- C21H24ClNO4
- Structure:
- Chemical Name:
- Cloxacillin Sodium EP Impurity B (Mixture of Diastereomers)
- CAS:
- 1642559-64-5
- MF:
- C18H20ClN3O4S
- Structure:
- Chemical Name:
- Ezetimibe Related Impurity 37
- CAS:
- 204589-68-4
- MF:
- C24H19F2NO2
- Structure:
- Chemical Name:
- S, R-Isovalganciclovir Impurity
- CAS:
- 1356932-18-7
- MF:
- C14H22N6O5
- Structure:
- Chemical Name:
- Sofosbuvir Impurity 8
- CAS:
- 944476-44-2
- MF:
- C24H22N2O8
- Structure:
- Chemical Name:
- 135270-13-2
- CAS:
- 135270-13-2
- MF:
- C12H11F2N3O
- Structure:
- Chemical Name:
- 1-((2'-cyanobiphenyl-4-yl)methyl)-4-methyl-2-propyl-1H-benzo[d]imidazole-6-carboxylic acid
- CAS:
- 1098100-87-8
- MF:
- C26H23N3O2
- Chemical Name:
- Fimasartan Impurity
- Structure:
- Chemical Name:
- 2-(((5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl)methyl)(methyl)amino)succinic acid
- MF:
- C21H20FN3O6S
- Structure:
- Chemical Name:
- ()-Olivil 4″-O-glucoside
- CAS:
- 76880-93-8
- MF:
- C26H34O12
- Structure:
- Chemical Name:
- 2-(DIETHYLAMINO)-N-(2,4-DIMETHYLPHENYL)ACETAMIDE
- CAS:
- 17289-53-1
- MF:
- C14H22N2O
- Structure:
- Chemical Name:
- (3RS)-3-[(Dimethylamino)methyl]-9-methyl-1,2,3,9-tetrahydro-4H-carbazol-4-one
- MF:
- C16H20N2O
- Structure:
- Chemical Name:
- 2,3,5,6-tetradeuterio-4-[5-[4-(hydroxymethyl)phenyl]-3-(trifluoromethyl)pyrazol-1-yl]benzenesulfonamide
- CAS:
- 1276524-56-1
- MF:
- C17H10D4F3N3O3S
- Structure:
- Chemical Name:
- 1,1-diphenylpropan-1-ol
- CAS:
- 5180-33-6
- MF:
- C15H16O
- Structure:
- Chemical Name:
- (R)-De(trifluoromethyl) Fluoxetine Hydrochloride
- CAS:
- 1212215-97-8
- MF:
- C16H20ClNO
- Structure:
- Chemical Name:
- (1R,5S)-1-phenyl-3-oxabicyclo[3.1.0]hexan-2-one
- CAS:
- 96847-52-8
- MF:
- C11H10O2
- Structure:
- Chemical Name:
- (1R,1'R,2S,2'S)-2,2'-[1,5-pentanediylbis[oxy(3-oxo-3,1-propanediyl)]]bis[1-[(3,4-dimethoxyphenyl)methyl]-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl-Isoquinolinium Benzenesulfonate
- CAS:
- 96946-46-2
- MF:
- C59H77N2O15S+
- Structure:
- Chemical Name:
- (2R,3R,4R,5R)-2-(4-amino-2-oxo-1,3,5-triazin-1(2H)-yl)-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-3-yl acetate
- MF:
- C10H14N4O6
- Structure:
- Chemical Name:
- 12-ethyl-8-methyl-9-oxo-7-propionyl-9,11-dihydroindolizino[1,2-b]quinolin-2-yl [1,4'-bipiperidine]-1'-carboxylate
- CAS:
- 176515-52-9
- MF:
- C32H38N4O4
- Structure:
- Chemical Name:
- 4-amino-5-chloro-N-(1-propylpiperidin-4-yl)-2,3-dihydrobenzofuran-7-carboxamide
- MF:
- C17H24ClN3O2
- Chemical Name:
- Ceftazidime Impurity D
- Chemical Name:
- Ceftazidime Sulfoxide Impurity
- Chemical Name:
- Tofacitinib Impurity Y
- Structure:
- Chemical Name:
- 5-amino-6-chloro-2-(propylthio)pyrimidin-4-ol
- MF:
- C7H10ClN3OS
- Chemical Name:
- Labetalol EP impurity G
- Structure:
- Chemical Name:
- 2-(2-NITROPHENYL)ETHANAMINE
- CAS:
- 33100-15-1
- MF:
- C8H10N2O2
- Structure:
- Chemical Name:
- CLOZAPINE-D3
- CAS:
- 1215691-72-7
- MF:
- C18H19ClN4
- Chemical Name:
- Bumetanide iMpurity F
- Structure:
- Chemical Name:
- IODIXANOL RELATED COMPOUND D (50 MG) (5-[ACETYL(2-HYDROXY-3-METHYLPROPYL)AMINO]-N,N'-BIS(2,3-DIHYDROXYPROPYL)2,4,6-TRIIODO-1,3-BENZE-NEDICARBOXAMIDE)
- CAS:
- 89797-00-2
- MF:
- C20H28I3N3O9
- Structure:
- Chemical Name:
- NIMODIPINE RELATED COMPOUND B (50 MG) (BIS(2-METHOXYETHYL) 2,6-DIMETHYL-4-(3-NITROPHE-NYL)-1,4-DIHYDROPYRIDINE-3,5-DICARBOXYLATE) (AS)
- CAS:
- 70172-96-2
- MF:
- C21H26N2O8
- Structure:
- Chemical Name:
- 1-METHYL-2-PHENOXYETHYLAMINE
- CAS:
- 35205-54-0
- MF:
- C9H13NO
- Structure:
- Chemical Name:
- (2R,4S)-Isopropyl 5-([1,1''-biphenyl]-4-yl)-4-(4-isopropoxy-4-oxobutanamido)-2-methylpentanoate
- CAS:
- 2216755-67-6
- MF:
- C28H37NO5
- Chemical Name:
- 1,2-Dihydro Diethyl Loteprednol Carbonate
- CAS:
- 82048-81-5
- MF:
- C26H36O9
- Structure:
- Chemical Name:
- Nilotinib 3-Imidazolyl N-oxide
- CAS:
- 2139382-75-3
- MF:
- C28H22F3N7O2
- Chemical Name:
- α,α''-[(Methylimino)di-2,1-ethanediyl]bis-benzenemethanol
- CAS:
- 857786-66-4
- MF:
- C19H25NO2
- Chemical Name:
- sodium 5-methoxy-2-sulfinatobenzo[d]imidazol-1-id
- Chemical Name:
- Pramipexole 828 Impurity
- Chemical Name:
- E-Ceftazidime Oxide Impurity
- Chemical Name:
- Cefuroxime Impurity D Δ3-Isomer
- Chemical Name:
- Ampicillin Open-Ring Formylation Impurity
- Chemical Name:
- Faropenem Degradation Impurity A
- Chemical Name:
- 2-(5-hydroxy-5H-chromeno[2,3-b]pyridin-7-yl)propanoic acid
- Chemical Name:
- Eribulin Impurity 2
- Chemical Name:
- (2S)-dimethyl 2-(4-(4-oxobutan-2-yl)benzamido)pentanedioate
- Chemical Name:
- (E)-1-(2,4-difluorostyryl)-1H-1,2,4-triazole
- Chemical Name:
- Peramivir Impurity 22
- Structure:
- Chemical Name:
- Olaparib Impurity 58
- CAS:
- 848136-41-4
- MF:
- C22H21FN4O3
- Structure:
- Chemical Name:
- Fluconazole Impurity 4
- CAS:
- 168479-96-7
- MF:
- C10H7F2N3O
- Structure:
- Chemical Name:
- Roxatidine Impurity 7
- CAS:
- 876497-65-3
- MF:
- C7H6N2O2
- Structure:
- Chemical Name:
- Sparfloxacin Impurity
- CAS:
- 126457-99-6
- MF:
- C19H21F2N3O3
- Chemical Name:
- Peramivir Impurity 39
- Chemical Name:
- Imatinib impurity 39
- Structure:
- Chemical Name:
- 7-(4-BROMOBUTOXY)-QUINOLINE-2(1H)-ONE
- CAS:
- 203395-59-9
- MF:
- C13H14BrNO2
- Structure:
- Chemical Name:
- DESMETHYL ATOMOXETINE HYDROCHLORIDE
- CAS:
- 881995-46-6
- MF:
- C16H19NO.ClH
- Structure:
- Chemical Name:
- 2-HYDROXY-5-BENZYLOXYACETOPHENONE
- CAS:
- 30992-63-3
- MF:
- C15H14O3
- Structure:
- Chemical Name:
- 2-[(4-METHOXY-3-METHYL-2-PYRIDINYL)-METHYLTHIO]-BENZIMIDAZOLE
- CAS:
- 102804-82-0
- MF:
- C15H15N3OS
- Structure:
- Chemical Name:
- 2-[(4-METHYLPIPERAZIN-1-YL)METHYL]BENZONITRILE
- CAS:
- 864069-00-1
- MF:
- C13H17N3
- Chemical Name:
- Afatinib impurity 84
- Chemical Name:
- Sugammadex sodium Impurity 40
- Chemical Name:
- Sugammadex sodium Impurity 44
- Chemical Name:
- Sugammadex sodium Impurity 49
- Chemical Name:
- Cefazolin Impurity EP-E
- Chemical Name:
- Canagliflozin Impurity 70
- Chemical Name:
- Dapoxetine impurity 66
- Chemical Name:
- EP Impurity Catalog
- Structure:
- Chemical Name:
- 2,3'-Bipyridine, 5-chloro-3-[4-(methylsulfonyl)phenyl]-, hydrochloride (1:1)
- CAS:
- 202409-39-0
- MF:
- C17H14Cl2N2O2S
- Chemical Name:
- 1,1'-((methylenebis(4-methoxy-3,1-phenylene))bis(2-(dimethylamino)ethane-1,1-diyl))dicyclohexanol
- Chemical Name:
- NA
- Chemical Name:
- Empagliflozin Impurity 116
- Chemical Name:
- (3R,5aS)-5,8-dioxooctahydro-5H-pyrrolo[1,2-a]thiazolo[3,2-d]pyrazine-3-carboxylic acid
- Chemical Name:
- Phospholipid Impurity 1(DPPE-MPEG5000 Impurity 1)
- Chemical Name:
- Carbazochrome Sodium Sulfonate Impurity 4
- Chemical Name:
- Empagliflozin Furanose Impurity
- Chemical Name:
- Rosuvastatin Impurity 144
- Chemical Name:
- Cetrorelix Impurity 11
- Chemical Name:
- Cetrorelix Impurity 4 (8-D-Arg)
- Chemical Name:
- Cetrorelix Impurity 1 (+L-Arg)
- Chemical Name:
- Peramivir Intermediate Impurity 36