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Pharmaceutical Impurity Reference Standards
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- Structure:
- Chemical Name:(R)-4-fluoro-2-((3-methyl-2,4-dioxo-6-(piperidin-3-ylamino)-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile
- CAS:
- MF:C18H20FN5O2
- Structure:
- Chemical Name:1-cyclopropyl-6-fluoro-8-methoxy-7-((4aS,7aS)-octahydro-1H-pyrrolo[3,4-b]pyridin-1-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid
- CAS:
- MF:C21H24FN3O4
- Structure:
- Chemical Name:ethyl 1-cyclopropyl-7-fluoro-6,8-dimethoxy-4-oxo-1,4-dihydroquinoline-3-carboxylate
- CAS:
- MF:C17H18FNO5
- Chemical Name:Dapagliflozin Impurity 1
- CAS:
- MF:
- Chemical Name:Ibrutinib Impurity 5
- CAS:
- MF:
- Structure:
- Chemical Name:Imatinib Impurity 4
- CAS:942514-62-7
- MF:C30H33N7O
- Structure:
- Chemical Name:Macitentan Impurity 2
- CAS:2211054-90-7
- MF:C10H8Br2N4O2
- Structure:
- Chemical Name:(R)-2-amino-4-(2-((4-(2-((2-hydroxy-2-phenylethyl)amino)ethyl) phenyl)amino)-2-oxoethyl)thiazole 3-oxide
- CAS:1884646-38-1
- MF:C21H24N4O3S
- Structure:
- Chemical Name:Nilotinib Impurity 7
- CAS:2119583-26-3
- MF:C27H20F3N7O
- Chemical Name:Regorafenib Impurity 1
- CAS:
- MF:
- Structure:
- Chemical Name:Regorafenib Impurity 6
- CAS:1187945-05-6
- MF:C20H12ClF4N3O4
- Chemical Name:Sofosbuvir Impurity 9
- CAS:
- MF:
- Structure:
- Chemical Name:Venlafaxine N-Oxide Impurity
- CAS:1021933-95-8
- MF:C16H25NO3
- Chemical Name:Vonoprazan Impurity 4
- CAS:
- MF:
- Structure:
- Chemical Name:Vortioxetine Impurity 25
- CAS:1639263-80-1
- MF:C18H22N2O2S
- Structure:
- Chemical Name:Cinacalcet Impurity B
- CAS:66469-40-7
- MF:C19H19N
- Structure:
- Chemical Name:Dapagliflozin Impurity D
- CAS:2133407-75-5
- MF:C21H25ClO6
- Structure:
- Chemical Name:Escitalopram Impurity
- CAS:91283-87-3
- MF:C18H14FNO3
- Chemical Name:Furosemide Imp.(EP)
- CAS:
- MF:
- Structure:
- Chemical Name:Nifuratel Impurity
- CAS:167103-07-3
- MF:C6H5N3O4
- Structure:
- Chemical Name:Vinpocetine Impurity
- CAS:102341-40-2
- MF:C19H23N3O
- Structure:
- Chemical Name:2-amino-9-((1R,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one
- CAS:1367369-81-0
- MF:C12H15N5O3
- Structure:
- Chemical Name:N-(3,4-dichlorophenyl)-7-methoxy-6-(3-morpholinopropoxy)quinazolin-4-amine
- CAS:2089650-13-3
- MF:C22H24Cl2N4O3
- Chemical Name:Moxifloxacin Impurity 8
- CAS:
- MF:
- Structure:
- Chemical Name:(3R,5S)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-3,5-dihydroxyheptanoic acid
- CAS:
- MF:C33H35FN2O5
- Chemical Name:Olaparib Imp.2
- CAS:
- MF:
- Structure:
- Chemical Name:Ciprofloxacin impurity I
- CAS:
- MF:C17H18FN3O3
- Structure:
- Chemical Name:5-(4'-((2-butyl-4-chloro-5-(isopropoxymethyl)-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazole
- CAS:1332713-64-0
- MF:C25H29ClN6O
- Chemical Name:Afatinib Impurity L (Afatinib N-Oxide)
- CAS:
- MF:
- Chemical Name:Afatinib Impurity L (Afatinib N-Oxide)
- CAS:
- MF:
- Structure:
- Chemical Name:Mirabegron Deshydroxy
- CAS:1581284-82-3
- MF:C21H24N4OS
- Structure:
- Chemical Name:4-Thiazoleacetyl chloride, 2-amino-, monohydrochloride
- CAS:66313-72-2
- MF:C5H6Cl2N2OS
- Structure:
- Chemical Name:1,2-bis(bromomethyl)-4,5-dimethoxybenzene
- CAS:26726-81-8
- MF:C10H12Br2O2
- Chemical Name:Alvimopan Impurity 2
- CAS:
- MF:
- Chemical Name:Alvimopan Impurity 4
- CAS:
- MF:
- Chemical Name:Isavuconazole Impurity 13
- CAS:
- MF:
- Structure:
- Chemical Name:Sofosbuvir Impurity13
- CAS:220503-64-0
- MF:C38H31N3O9
- Structure:
- Chemical Name:21-Acetyl-6β-fluorotriamcinolone Acetonide
- CAS:67438-37-3
- MF:C26H32F2O7
- Structure:
- Chemical Name:Quetiapine EP Impurity W
- CAS:1800608-95-0
- MF:C34H32N4O2S2
- Structure:
- Chemical Name:(2R,3R)-1,1,4,4-tetraphenylbutane-1,2,3,4-tetrol
- CAS:117780-08-2
- MF:C28H26O4
- Structure:
- Chemical Name:(11β,16α)-21-(Acetyloxy)-11,16,17-trihydroxypregna-1,4,14-triene-3,20-dione
- CAS:131918-72-4
- MF:C23H28O7
- Structure:
- Chemical Name:(S)-Alogliptin Benzoate Salt
- CAS:1638544-64-5
- MF:C25H27N5O4
- Structure:
- Chemical Name:(S)-Alogliptin Benzoate Salt
- CAS:1638544-64-5
- MF:C25H27N5O4
- Structure:
- Chemical Name:O-Acetyl Silodosin
- CAS:160970-86-5
- MF:C27H34F3N3O5
- Structure:
- Chemical Name:Azilsartan Impurity
- CAS:1675221-59-6
- MF:C25H22N2O5
- Chemical Name:Agomelatine Impurity 1
- CAS:
- MF:
- Chemical Name:Agomelatine Impurity 1
- CAS:
- MF:
- Chemical Name:Olaparib Impurity I
- CAS:
- MF:
- Chemical Name:Brexpiprazole Impurity C
- CAS:
- MF:
- Chemical Name:Dapoxetine Impurity 7
- CAS:
- MF:
- Structure:
- Chemical Name:Irbesartan Impurity 5
- CAS:1213252-81-3
- MF:C25H28N6O
- Chemical Name:Cabozantinib impurity C
- CAS:
- MF:
- Structure:
- Chemical Name:Loratadine Impurity 4
- CAS:
- MF:C22H23ClN2O2
- Structure:
- Chemical Name:Metoprolol IMpurity 4
- CAS:
- MF:C15H25NO3
- Structure:
- Chemical Name:N-(3-(6-amino-5-(2-(methyl(nitroso)amino)ethoxy)pyrimidin-4-yl)-5-fluoro-2-methylphenyl)-4-cyclopropyl-2-fluorobenzamide
- CAS:3103121-14-5
- MF:C24H24F2N6O3
- Chemical Name:N-Nitroso Aprocitentan
- CAS:
- MF:
- Structure:
- Chemical Name:Nsc249004
- CAS:7428-39-9
- MF:C9H13N3O5
- Structure:
- Chemical Name:Dexmedetomidine Impurity 4
- CAS:1061620-86-7
- MF:C19H24N2O6
- Structure:
- Chemical Name:(3S,5R,6E)-7-[2-Cyclopropyl-4-(4-fluorophenyl)-3-quinolinyl]-3,5-dihydroxy-6-heptenoic acid
- CAS:254452-86-3
- MF:C25H24FNO4
- Chemical Name:Favipravir Impurity 10
- CAS:
- MF:
- Structure:
- Chemical Name:(E)-4-Acetoxy Tamoxifen
- CAS:76117-70-9
- MF:C28H31NO3
- Structure:
- Chemical Name:Atorvastatin Cyclic Isopropyl Impurity
- CAS:873950-17-5
- MF:C33H35FN2O7
- Structure:
- Chemical Name:O-Acetyl Losartan
- CAS:1006062-27-6
- MF:C24H25ClN6O2
- Structure:
- Chemical Name:(2-Chloro-5-iodophenyl)(4-ethoxyphenyl)methanone
- CAS:1103738-26-6
- MF:C15H12ClIO2
- Structure:
- Chemical Name:3-Dechloro-4-chloro Lamotrigine
- CAS:38943-76-9
- MF:C9H7Cl2N5
- Structure:
- Chemical Name:D-2’-Deoxyribofuranosyl-3-guanylurea (α/β-Mixture)
- CAS:570410-72-9
- MF:C7H14N4O4
- Structure:
- Chemical Name:Difluoro Atorvastatin
- CAS:693794-20-6
- MF:C66H66CaF4N4O10
- Structure:
- Chemical Name:(4S,trans)-1,1-Dimethylethyl-6-aminoethyl-2,2-dimethyl-1,3-dioxane-4-acetate
- CAS:1105067-89-7
- MF:C14H27NO4
- Structure:
- Chemical Name:rac 5-Keto Fluvastatin
- CAS:1160169-39-0
- MF:C24H24FNO4
- Structure:
- Chemical Name:9-Piperazino Ofloxacin
- CAS:197291-75-1
- MF:C18H20FN3O4
- Structure:
- Chemical Name:Thyroxine-4-hydroxy-3,5-diiodophenyl Ether DISCONTINUED
- CAS:911661-90-0
- MF:C21H13I6NO5
- Chemical Name:Exemestane Impurity A
- CAS:
- MF:
- Structure:
- Chemical Name:(1R,3S)-1-(1,3-Benzodioxol-5-yl)-2-(2-chloroacetyl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic Acid Methyl Ester
- CAS:629652-44-4
- MF:C22H19ClN2O5
- Structure:
- Chemical Name:3-DesMorpholinyl-3-hydroxyethylaMino Gefitinib
- CAS:847949-56-8
- MF:C20H22ClFN4O3
- Structure:
- Chemical Name:4-Deschloro-4-(2-furanylMethyl)aMino FuroseMide
- CAS:5046-19-5
- MF:C17H17N3O6S
- Structure:
- Chemical Name:Cephalexin Sulfoxide
- CAS:56193-21-6
- MF:C16H17N3O5S
- Structure:
- Chemical Name:N-Butyl Nor ScopolaMine Hydrochloride
- CAS:22235-98-9
- MF:C20H28ClNO4
- Structure:
- Chemical Name:11β-Hydroxy Dienogest
- CAS:86153-39-1
- MF:C20H25NO3
- Structure:
- Chemical Name:2H,5H-Pyrano[4,3-b]pyranyl Mupirocin SodiuM IMpurity
- CAS:116182-44-6
- MF:C26H43NaO9
- Structure:
- Chemical Name:3-Hydroxy CitalopraM
- CAS:411221-53-9
- MF:C20H21FN2O2
- Structure:
- Chemical Name:5-(OxiranylMethoxy)-2,3,4,9-tetrahydrocarbazole
- CAS:58457-32-2
- MF:C15H17NO2
- Chemical Name:Mirabegron Impurity 10
- CAS:
- MF:
- Structure:
- Chemical Name:8-cyclopentyl-6-(1-hydroxyethyl)-5-methyl-2-((5-(piperazin-1-yl)pyridin-2-yl)amino)pyrido[2,3-d]pyrimidin-7(8H)-one
- CAS:1376615-91-6
- MF:C24H31N7O2
- Chemical Name:Plerixafor Impurity A
- CAS:
- MF:
- Structure:
- Chemical Name:Ceftazidime Impurity G
- CAS:138829-73-9
- MF:C11H14N4O5S
- Chemical Name:Vonoprazan Impurity 6
- CAS:
- MF:
- Structure:
- Chemical Name:Umeclidinium Bromide Impurity 4
- CAS:869112-31-2
- MF:C22H28BrNO2
- Chemical Name:Deschloro Etoricoxib
- CAS:
- MF:
- Structure:
- Chemical Name:Cefazolin impurity B
- CAS:1798004-55-3
- MF:C16H20N4O4S3.Na
- Structure:
- Chemical Name:5-chloro-N-(4-((S)-5-((5-chlorothiophene-2-carboxamido)methyl)-2-oxooxazolidin-3-yl)phenyl)-N-(2-(2-oxo-2-((((S)-2-oxo-3-(4-(3-oxomorpholino)phenyl)oxazolidin-5-yl)methyl)amino)ethoxy)ethyl)thiophene-2-carboxamide
- CAS:1632463-24-1
- MF:C38H36Cl2N6O10S2
- Structure:
- Chemical Name:Apremilast Impurity 4
- CAS:1831833-38-5
- MF:C12H16O4S
- Chemical Name:Rivaroxaban Impurity 16
- CAS:
- MF:
- Chemical Name:Topiroxostat Impurity 3
- CAS:
- MF:
- Chemical Name:Diroxide Impurity 4
- CAS:
- MF:
- Structure:
- Chemical Name:(R,E)-4-((3-(3-(diisopropylamino)-1-phenylpropyl)-4-hydroxybenzyl)oxy)-4-oxobut-2-enoic acid
- CAS:
- MF:C26H33NO5
- Structure:
- Chemical Name:Flomoxef Impurity 2
- CAS:1208982-59-5
- MF:C32H30N6O7S
- Chemical Name:Lincomycin impurity B
- CAS:
- MF:
- Structure:
- Chemical Name:Valsartan Impurity 1
- CAS:914465-68-2
- MF:C19H21N5O
- Structure:
- Chemical Name:Axitinib Impurity 2
- CAS:1428728-83-9
- MF:C44H36N8O2S2
- Structure:
- Chemical Name:Ethanone, 1-[3,5-bis(phenylmethoxy)phenyl]-2-[(1,1-dimethylethyl)(phenylmethyl)amino]-, sulfate (1:1)
- CAS:52144-93-1
- MF:C33H37NO7S