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Pharmaceutical Impurity Reference Standards
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- Chemical Name:Doxofylline Impurity 22
- CAS:
- MF:
- Chemical Name:Dapoxetine impurity 61
- CAS:
- MF:
- Chemical Name:Dapoxetine impurity 55
- CAS:
- MF:
- Structure:
- Chemical Name:1-METHYLBIGUANIDE SULPHATE
- CAS:1609-00-3
- MF:C3H9N5
- Structure:
- Chemical Name:1-(3,5-DIHYDROXYPHENYL)-2-[(1,1-DIMETHYLETHYL)AMINO]-ETHANONE, HYDROCHLORIDE
- CAS:1246815-70-2
- MF:C12H18ClNO3
- Structure:
- Chemical Name:4-(((2R,3S,4R,5R,6R)-6-(Benzyloxy)-3-((diphenoxyphosphoryl)oxy)-4-(tetradecanoyloxy)-5-((S)-3-(tetradecanoyloxy)tetradecanaMido)tetrahydro-2H-pyran-2-yl)Methoxy)-4-oxobutanoic acid
- CAS:110611-91-1
- MF:C71H110NO15P
- Structure:
- Chemical Name:2-[4-(2,3-EPOXYPROPOXY)PHENYL]ACETAMIDE
- CAS:29122-69-8
- MF:C11H13NO3
- Chemical Name:Oxacillin Impurity H
- CAS:
- MF:
- Structure:
- Chemical Name:PeraMpanel
- CAS:380918-54-7
- MF:C23H15N3O
- Chemical Name:Empagliflozin Impurity 79
- CAS:
- MF:
- Structure:
- Chemical Name:Empagliflozin Impurity 89
- CAS:2452301-32-3
- MF:C23H25ClO7
- Structure:
- Chemical Name:Levocarnitine Impurity F
- CAS:6490-19-3
- MF:C7H17ClN2O2
- Structure:
- Chemical Name:4,4-dimethyl-2-(2-phenylpropan-2-yl)oxazo‐ line
- CAS:874895-87-1
- MF:C14H19NO
- Chemical Name:Formoterol Impurity 4
- CAS:
- MF:
- Structure:
- Chemical Name:Roxadustat-001
- CAS:319-57-3
- MF:C8H5BF4N2O2
- Chemical Name:Ornidazole Impurity 24
- CAS:
- MF:
- Chemical Name:Olanzapine impurity ANB
- CAS:
- MF:
- Chemical Name:Pitavastatin Impurity 75
- CAS:
- MF:
- Chemical Name:Febuxostat Impurity 100
- CAS:
- MF:
- Chemical Name:Febuxostat Impurity 101
- CAS:
- MF:
- Chemical Name:Febuxostat Impurity 105
- CAS:
- MF:
- Structure:
- Chemical Name:Ticagrelor Impurity 129
- CAS:1381841-36-6
- MF:C15H19NO3
- Structure:
- Chemical Name:Benzoic acid, 2-hydroxy-3-(2-phenyldiazenyl)-
- CAS:136819-59-5
- MF:C13H10N2O3
- Structure:
- Chemical Name:5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 7-[[(2Z)-(2-amino-4-thiazolyl)(methoxyimino)acetyl]amino]-8-oxo-3-[[(1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-1,2,4-triazin-3-yl)thio]methyl]-, 5-oxide, (6R,7R)- (9CI)
- CAS:97466-28-9
- MF:C18H18N8O8S3
- Structure:
- Chemical Name:1,3-Benzenediamine, 4-methyl-N3-[4-methyl-6-(3-pyridinyl)-2-pyrimidinyl]-
- CAS:1032314-73-0
- MF:C17H17N5
- Chemical Name:5-methoxy-1-methyl-1H-benzo[d]imidazole-2-sulfonic acid
- CAS:
- MF:
- Chemical Name:Teneligliptin Impurity 17
- CAS:
- MF:
- Structure:
- Chemical Name:1(3H)-Isobenzofuranone, 3-(1-methylpropyl)-
- CAS:261783-87-3
- MF:C12H14O2
- Chemical Name:(2S,5R)-2-carbamoyl-7-oxo-1,6-diazabicyclo[3.2.1]octan-6-yl methyl sulfate
- CAS:
- MF:
- Structure:
- Chemical Name:Carbamic acid, N-[(1R)-2-[5-(2-fluoro-3-hydroxyphenyl)-3-[[2-fluoro-6-(trifluoromethyl)phenyl]methyl]-3,6-dihydro-4-methyl-2,6-dioxo-1(2H)-pyrimidinyl]-1-phenylethyl]-, 1,1-dimethylethyl ester
- CAS:1062642-68-5
- MF:C32H30F5N3O5
- Structure:
- Chemical Name:2-Oxazolidinone, 5-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)-, (5S)-
- CAS:2514942-86-8
- MF:C13H15NO4
- Structure:
- Chemical Name:Heptanoic acid, 7-[[(3R,5R)-7-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-3,5-dihydroxy-1-oxoheptyl]amino]-3,5-dihydroxy-, 1,1-dimethylethyl ester, (3R,5R)-
- CAS:2409556-65-4
- MF:C44H56FN3O8
- Structure:
- Chemical Name:6-Heptenoic acid, 7-[4-(4-fluorophenyl)-6-(1-methylethyl)-2-[methyl(methylsulfonyl)amino]-5-pyrimidinyl]-5-hydroxy-3-oxo-, (5S,6E)-
- CAS:1803023-43-9
- MF:C22H26FN3O6S
- Chemical Name:Drug impurity detection and analysis
- CAS:
- MF:
- Structure:
- Chemical Name:1-Pyrrolidinecarboxamide, N-[5-[(2S)-2-(2,5-difluorophenyl)-1-pyrrolidinyl]pyrazolo[1,5-a]pyrimidin-3-yl]-3-hydroxy-, (3R)-
- CAS:2409590-08-3
- MF:C21H22F2N6O2
- Structure:
- Chemical Name:Sertraline Impurity 20
- CAS:1498236-91-1
- MF:C16H14Cl2O
- Chemical Name:Budesonide Impurity 21
- CAS:
- MF:
- Structure:
- Chemical Name:2H-3-Benzazepin-2-one, 3-(3-bromopropyl)-1,3,4,5-tetrahydro-7,8-dimethoxy-
- CAS:1192174-72-3
- MF:C15H20BrNO3
- Structure:
- Chemical Name:Benzamide, 2-[(1-acetyl-3-iodo-1H-indazol-6-yl)thio]-N-methyl-
- CAS:1639138-00-3
- MF:C17H14IN3O2S
- Structure:
- Chemical Name:1-Cyclohexene-1-carboxylic acid, 4-(acetylamino)-3-(1-ethylpropoxy)-5-nitro-, ethyl ester, (3R,4R,5S)-
- CAS:949164-64-1
- MF:C16H26N2O6
- Chemical Name:Peramivir Impurity 55
- CAS:
- MF:
- Chemical Name:Peramivir Impurity 60
- CAS:
- MF:
- Structure:
- Chemical Name:Hexanoic acid, 3-(hydroxymethyl)-, methyl ester, (3R)-
- CAS:2408196-94-9
- MF:C8H16O3
- Chemical Name:Loratadine EP Impurity L
- CAS:
- MF:
- Structure:
- Chemical Name:Pregna-1,4-dien-3-one, 21-(acetyloxy)-11,17,20-trihydroxy-6-methyl-, (6α,11β)- (9CI)
- CAS:151003-82-6
- MF:C24H34O6
- Structure:
- Chemical Name:3-Pyridinecarboxamide, 5-chloro-N-[4-(4-chloro-2-thienyl)-5-(4-cyclohexyl-1-piperazinyl)-2-thiazolyl]-1,6-dihydro-6-oxo-
- CAS:762237-66-1
- MF:C23H25Cl2N5O2S2
- Structure:
- Chemical Name:3-(4-TRIFLUOROMETHYL-PHENYL)-PROPAN-1-OL
- CAS:180635-74-9
- MF:C10H11F3O
- Chemical Name:Avatrombopag Impurity 39
- CAS:
- MF:
- Structure:
- Chemical Name:(E)-2-CYANO-5-METHYL-HEX-2-ENOIC ACID METHYL ESTER
- CAS:96914-67-9
- MF:C9H13NO2
- Chemical Name:Nicergoline Impurity 7
- CAS:
- MF:
- Structure:
- Chemical Name:N,N'-Bis(2-Hydroxyethyl)propane-1,3-diamine
- CAS:10563-27-6
- MF:C7H18N2O2
- Structure:
- Chemical Name:1026009-77-7
- CAS:1026009-77-7
- MF:C20H22N2O
- Structure:
- Chemical Name:α,α,α'',5-Tetramethyl-1,3-benzenediacetonitrile
- CAS:120512-38-1
- MF:C14H16N2
- Structure:
- Chemical Name:α,α,α'',5-Tetramethyl-1,3-benzenediacetonitrile
- CAS:120512-38-1
- MF:C14H16N2
- Chemical Name:Regorafenib Impurity MJ
- CAS:
- MF:
- Chemical Name:Aztreonam Open-Ring Desulfurization Impurity
- CAS:
- MF:
- Chemical Name:Azlocillin dioxide Impurity
- CAS:
- MF:
- Chemical Name:Azlocillin dioxide Impurity
- CAS:
- MF:
- Chemical Name:7-(2-methoxypropanoyl)-5H-chromeno[2,3-b]pyridin-5-one
- CAS:
- MF:
- Structure:
- Chemical Name:Ibrutinib Impurity 42
- CAS:2031255-24-8
- MF:C25H23N5O3
- Chemical Name:Pramipexole Impurity N
- CAS:
- MF:
- Structure:
- Chemical Name:Hydroxychloroquine Impurity 12 Hydrochloride
- CAS:2411340-31-1
- MF:C18H26ClN3O
- Structure:
- Chemical Name:Verteporfin impurity
- CAS:121310-58-5
- MF:C40H40N4O8
- Chemical Name:Peramivir Impurity 25
- CAS:
- MF:
- Structure:
- Chemical Name:Peramivir Impurity 33
- CAS:2758048-78-9
- MF:C18H34N2O5
- Chemical Name:Imatinib impurity XT
- CAS:
- MF:
- Chemical Name:4-((3-hydroxy-1H-indazol-5-yl)methyl)phthalazin-1(2H)-one
- CAS:
- MF:
- Structure:
- Chemical Name:Tirofiban Impurity 79
- CAS:158808-85-6
- MF:C21H34N2O5S
- Chemical Name:Brivaracetam Impurity 47
- CAS:2755924-55-9
- MF:
- Chemical Name:(Glu3)-Carbetocin (Impurity D)
- CAS:
- MF:
- Structure:
- Chemical Name:(Z)-[cyano(2,3-dichlorophenyl)methylene]carbazamidine
- CAS:94213-23-7
- MF:C9H7Cl2N5
- Chemical Name:Perampanel Impurity ABCDEFGHJKL
- CAS:
- MF:
- Structure:
- Chemical Name:ethyl 3-acetoxy-2-butenoate
- CAS:29214-62-8
- MF:C8H12O4
- Structure:
- Chemical Name:2-(bromomethyl)-2-(2,4-dichlorophenyl)-1,3-dioxolane-4-methanol
- CAS:68751-57-5
- MF:C11H11BrCl2O3
- Structure:
- Chemical Name:INDEX NAME NOT YET ASSIGNED
- CAS:2511244-96-3
- MF:C27H36N2O6
- Chemical Name:Oseltamivir Impurity 91
- CAS:
- MF:
- Chemical Name:Oseltamivir Impurity 80
- CAS:
- MF:
- Chemical Name:Oseltamivir Impurity 72
- CAS:
- MF:
- Structure:
- Chemical Name:4(1H)-Quinazolinone, 6,8-dibromo-3-cyclohexyl-2,3-dihydro-
- CAS:2512203-87-9
- MF:C14H16Br2N2O
- Structure:
- Chemical Name:Linagliptin impurity KH-3
- CAS:2279114-27-9
- MF:C30H37N7O6
- Structure:
- Chemical Name:11beta,21-dihydroxypregna-1,4,16-triene-3,20-dione 21-acetate
- CAS:3044-42-6
- MF:C23H28O5
- Structure:
- Chemical Name:3-[3-(tert-butylamino)-2-hydroxypropoxy]-4-morpholino-1,2,5-thiadiazole monomaleate
- CAS:57073-55-9
- MF:C17H28N4O7S
- Chemical Name:Ampicillin Impurity U
- CAS:
- MF:
- Chemical Name:Canagliflozin Hydroperoxide Impurity
- CAS:
- MF:
- Structure:
- Chemical Name:(E)-2-hydroxy-4-(phenyldiazenyl)benzoic acid
- CAS:40038-46-8
- MF:C13H10N2O3
- Chemical Name:Sitagliptin EP Impurity 6
- CAS:
- MF:
- Structure:
- Chemical Name:Vonoprazan-005
- CAS:2514735-09-0
- MF:C33H27F3N4
- Structure:
- Chemical Name:D-erythro-Hexonic acid, 6-S-2-benzothiazolyl-2,4-dideoxy-6-thio-, 1,1-dimethylethyl ester
- CAS:1469771-46-7
- MF:C17H23NO4S2
- Structure:
- Chemical Name:1-Demethyl Hydroxy Daunomycinone
- CAS:58199-98-7
- MF:C20H16O9
- Structure:
- Chemical Name:(S)-2-(butylsulfonamido)-3-(4-(4-(1-methylpiperidin-4-yl)butoxy)phenyl)propanoic acid
- CAS:1631053-75-2
- MF:C23H38N2O5S
- Structure:
- Chemical Name:FEXOFENADINE EP IMPURITY A - HCl
- CAS:153439-43-1
- MF:C32H38ClNO4
- Structure:
- Chemical Name:2-[(4-Chloro-3-Methyl-2-Pyridinyl-methyl)thio]-1H-Benzimidazole
- CAS:103312-62-5
- MF:C14H12ClN3S
- Structure:
- Chemical Name:Pazufloxacin
- CAS:127046-18-8
- MF:C18H19FN2O4
- Structure:
- Chemical Name:Vinpocetine
- CAS:80038-06-8
- MF:C22H26N2O2