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Pharmaceutical Impurity Reference Standards
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- Structure:
- Chemical Name:4,4'-(1H-1,2,4-Triazol-1-ylmethylene)bis[benzoic acid]
- CAS:1644566-39-1
- MF:C17H13N3O4
- Chemical Name:Cefminox Sodium impurity B
- CAS:
- MF:
- Chemical Name:Cefotiam Impurity B
- CAS:
- MF:
- 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
- CAS:
- MF:
- Chemical Name:Peramivir Impurity E
- CAS:
- MF:
- Chemical Name:Lincomycin sulfoxide Impurity 3
- CAS:
- MF:
- Chemical Name:Lincomycin sulfoxide Impurity F
- CAS:
- MF:
- Chemical Name:Fasudil iMpurity F
- CAS:
- MF:
- 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
- CAS:
- MF:
- Structure:
- Chemical Name:Mupirocin Impurity 3
- CAS:
- 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
- CAS:
- MF:
- 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
- CAS:
- MF:
- Structure:
- Chemical Name:2-(((5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl)methyl)(methyl)amino)succinic acid
- CAS:
- 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
- CAS:
- 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
- CAS:
- 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
- CAS:
- MF:C17H24ClN3O2
- Chemical Name:Ceftazidime Impurity D
- CAS:
- MF:
- Chemical Name:Ceftazidime Sulfoxide Impurity
- CAS:
- MF:
- Chemical Name:Tofacitinib Impurity Y
- CAS:
- MF:
- Structure:
- Chemical Name:5-amino-6-chloro-2-(propylthio)pyrimidin-4-ol
- CAS:
- MF:C7H10ClN3OS
- Chemical Name:Labetalol EP impurity G
- CAS:
- MF:
- 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
- CAS:
- MF:
- 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
- Structure:
- 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
- CAS:
- MF:
- Chemical Name:Pramipexole 828 Impurity
- CAS:
- MF:
- Chemical Name:E-Ceftazidime Oxide Impurity
- CAS:
- MF:
- Chemical Name:Cefuroxime Impurity D Δ3-Isomer
- CAS:
- MF:
- Chemical Name:Ampicillin Open-Ring Formylation Impurity
- CAS:
- MF:
- Chemical Name:Faropenem Degradation Impurity A
- CAS:
- MF:
- Chemical Name:2-(5-hydroxy-5H-chromeno[2,3-b]pyridin-7-yl)propanoic acid
- CAS:
- MF:
- Chemical Name:Eribulin Impurity 2
- CAS:
- MF:
- Chemical Name:(2S)-dimethyl 2-(4-(4-oxobutan-2-yl)benzamido)pentanedioate
- CAS:
- MF:
- Chemical Name:(E)-1-(2,4-difluorostyryl)-1H-1,2,4-triazole
- CAS:
- MF:
- Chemical Name:Peramivir Impurity 22
- CAS:
- MF:
- 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
- CAS:
- MF:
- Chemical Name:Imatinib impurity 39
- CAS:
- MF:
- 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
- CAS:
- MF:
- Chemical Name:Sugammadex sodium Impurity 40
- CAS:
- MF:
- Chemical Name:Sugammadex sodium Impurity 44
- CAS:
- MF:
- Chemical Name:Sugammadex sodium Impurity 49
- CAS:
- MF:
- Chemical Name:Cefazolin Impurity EP-E
- CAS:
- MF:
- Chemical Name:Canagliflozin Impurity 70
- CAS:
- MF:
- Chemical Name:Dapoxetine impurity 66
- CAS:
- MF:
- Chemical Name:EP Impurity Catalog
- CAS:
- MF:
- Structure:
- Chemical Name:2,3'-Bipyridine, 5-chloro-3-[4-(methylsulfonyl)phenyl]-, hydrochloride (1:1)
- CAS:202409-39-0
- MF:C17H14Cl2N2O2S
- Chemical Name:2-amino-4-(2-(benzyl(1-(4-methoxyphenyl)propan-2-yl)amino)-1-hydroxyethyl)phenol
- CAS:
- MF:
- Chemical Name:Peramivir Deacetyl Impurity
- CAS:
- MF:
- Chemical Name:Empagliflozin Impurity 116
- CAS:
- MF:
- Chemical Name:(3R,5aS)-5,8-dioxooctahydro-5H-pyrrolo[1,2-a]thiazolo[3,2-d]pyrazine-3-carboxylic acid
- CAS:
- MF:
- Chemical Name:Phospholipid Impurity 1(DPPE-MPEG5000 Impurity 1)
- CAS:
- MF:
- Chemical Name:Carbazochrome Sodium Sulfonate Impurity 4
- CAS:
- MF:
- Chemical Name:Empagliflozin Furanose Impurity
- CAS:
- MF:
- Chemical Name:Rosuvastatin Impurity 144
- CAS:
- MF:
- Chemical Name:Cetrorelix Impurity 11
- CAS:
- MF:
- Chemical Name:Cetrorelix Impurity 4 (8-D-Arg)
- CAS:
- MF:
- Chemical Name:Cetrorelix Impurity 1 (+L-Arg)
- CAS:
- MF: