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Pharmaceutical Impurity Reference Standards
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- Structure:
- Chemical Name:1-Phenyl-3,4-dihydroisoquinoline
- CAS:52250-50-7
- MF:C15H13N
- Structure:
- Chemical Name:Pyrazinecarboxamide, 3,6-difluoro- (9CI)
- CAS:356783-29-4
- MF:C5H3F2N3O
- Structure:
- Chemical Name:Benzamide, 3-hydrazino- (9CI)
- CAS:473927-51-4
- MF:C7H9N3O
- Structure:
- Chemical Name:4-[5-({2-[(4-{5-[Bis(2-chloroethyl)amino]-1-methyl-1H-benzimidazol-2-yl}butanoyl)oxy]ethyl}(2-chloroethyl)amino)-1-methyl-1H benzimidazol-2-yl]butanoic acid
- CAS:1926162-37-9
- MF:C32H42Cl4N6O4
- Structure:
- Chemical Name:Isavuconazole Impurity 39
- CAS:207224-73-5
- MF:C21H18F2N4OS
- Chemical Name:Anastrozole Impurity 41
- CAS:
- MF:
- Chemical Name:Anastrozole Impurity 41
- CAS:
- MF:
- Chemical Name:Isavuconazole Impurityi45
- CAS:
- MF:
- Structure:
- Chemical Name:Gatifloxacinacid
- CAS:121577-32-0
- MF:C19H22FN3O4.ClH
- Chemical Name:Bisoprolol Impurity 41
- CAS:
- MF:
- Structure:
- Chemical Name:1,4-Naphthalenedione, 2-(3-hydroxy-3,7,11,15-tetramethyl-1,6,10,14-hexadecatetraenyl)-3-methyl-, (,E,E)- (9CI)
- CAS:65061-22-5
- MF:C31H40O3
- Chemical Name:Piperacilin
- CAS:
- MF:
- Chemical Name: Varenicline Impurity D
- CAS:1002359-81-0
- MF:
- Structure:
- Chemical Name:2-Propanone, 1-(2-hydroxypropoxy)- (9CI)
- CAS:90817-38-2
- MF:C6H12O3
- Chemical Name:Nirmatrelvir Impurity 4
- CAS:
- MF:
- Chemical Name:Nifedipine Impurity L
- CAS:
- MF:
- Structure:
- Chemical Name:2-Pyrrolidinone, 3,4-dihydroxy-5-(hydroxymethyl)-, (3R,4R,5R)- (9CI)
- CAS:155102-96-8
- MF:C5H9NO4
- Structure:
- Chemical Name:TRANS-4-AMINOCROTONIC ACID
- CAS:38090-53-8
- MF:C4H7NO2
- Structure:
- Chemical Name:2-bromo-3-(1,3,2-dioxaborinan-2-yl)benzonitrile
- CAS:380919-34-6
- MF:C23H17N3O2
- Chemical Name:Empagliflozin Impurity 83
- CAS:
- MF:
- Structure:
- Chemical Name:Ambroxol Imp.O
- CAS:1807328-39-7
- MF:C13H12Br2N2O
- Structure:
- Chemical Name:Olopatadine Impurity 10 HBr
- CAS:4174-83-8
- MF:C22H26Br2NP
- Chemical Name:Iohexol Impurity Q
- CAS:
- MF:
- Chemical Name:Avibactam sodium Impurity CIS
- CAS:
- MF:
- Structure:
- Chemical Name:Diphenidol Impurity 2
- CAS:63645-18-1
- MF:C16H17ClO
- Structure:
- Chemical Name:(2,5-dibromophenyl)(4-ethoxyphenyl)methanone
- CAS:1713015-63-4
- MF:C15H12Br2O2
- Chemical Name:Flucloxacillin Impurity 1
- CAS:
- MF:
- Chemical Name:Rocuronium Bromide Impurity 39
- CAS:
- MF:
- Structure:
- Chemical Name:Ticagrelor Intermediate 1 D-Tartrate
- CAS:2376278-72-5
- MF:C14H25NO10
- Structure:
- Chemical Name:2-(3,5-dicyano-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid
- CAS:2428631-65-4
- MF:C17H15N3O3S
- Structure:
- Chemical Name:Roxadustat impurity ZZ5
- CAS:
- MF:C17H12ClNO4
- Structure:
- Chemical Name:Lenvatinib impurity LFZZ-7
- CAS:
- MF:C11H9ClN2O2
- Chemical Name:Rosuvastatin Impurity 119
- CAS:
- MF:
- Chemical Name:Rosuvastatin Impurity 105
- CAS:
- MF:
- Structure:
- Chemical Name:(2R,3R,4R,5S,6R)-2-(acetoxymethyl)-6-(4-chloro-3-(4-(((S)-tetrahydrofuran-3-yl)oxy)benzyl)phenyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate
- CAS:1620758-27-1
- MF:C31H35ClO11
- Chemical Name:Febuxostat Impurity 99
- CAS:
- MF:
- Chemical Name:Furosemide Impurity 20
- CAS:
- MF:
- Structure:
- Chemical Name:(3R,4R,5S)-ethyl 4,5-diacetamido-3-(pentan-3-yloxy)cyclohex-1- enecarboxylate
- CAS:1191921-01-3
- MF:C18H30N2O5
- Chemical Name:Ticagrelor Impurity 109
- CAS:
- MF:
- Chemical Name:Ticagrelor Impurity 134
- CAS:
- MF:
- Structure:
- Chemical Name:2-Propenamide, 2-cyano-3-(3,4-dihydroxyphenyl)-N,N-diethyl-, (2E)-
- CAS:1217439-96-7
- MF:C14H16N2O3
- Structure:
- Chemical Name:Benzonitrile, 4,4'-[[2,2'-bis(hydroxymethyl)[1,1'-biphenyl]-4,4'-diyl]bis(oxy)]bis-
- CAS:2254541-79-0
- MF:C28H20N2O4
- Structure:
- Chemical Name:Benzoic acid, 3-(butylamino)-5-[(butylamino)sulfonyl]-4-phenoxy-
- CAS:28469-01-4
- MF:C21H28N2O5S
- Structure:
- Chemical Name:Acetamide, N-[9-[[2-(acetyloxy)-1-(hydroxymethyl)ethoxy]methyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]-
- CAS:298197-26-9
- MF:C13 H17 N5 O6
- Chemical Name:Topiroxostat Impurity 46
- CAS:
- MF:
- Chemical Name:Topiroxostat Impurity 43
- CAS:
- MF:
- Structure:
- Chemical Name:N-(2-(1-hydroxycyclohexyl)-2-(4-methoxyphenyl)ethyl)-N-methyl formamide
- CAS:1643948-40-6
- MF:C17H25NO3
- Chemical Name:Regorafenib Impurity 40
- CAS:
- MF:
- Chemical Name:Bumetanide Impurity 24
- CAS:
- MF:
- Chemical Name:Rocuronium Bromide Impurity 37、38、39
- CAS:
- MF:
- Chemical Name:Ritonavir EP Impurity HIJ
- CAS:
- MF:
- Chemical Name:Crisaborole Impurity 42
- CAS:
- MF:
- Structure:
- Chemical Name:IRBESARTAN RELATED COMPOUND A (25 MG) (1-PENTANOYLAMINO-CYCLOPENTANECARBOXYLIC ACID [2'-(1H-TETRAZOL-5-YL)-BIPHENYL-4-YLMETHYL]-AMIDE)
- CAS:748812-53-5
- MF:C25H30N6O2
- Structure:
- Chemical Name:FENOFIBRATE RELATED COMPOUND C (25 MG) (1-METHYLETHYL 2-[[2-[4-(4-CHLOROBENZOYL)PHENOXY]-2-METHYLPROPANOYL]OXY]-2-METHYLPROPANOATE)
- CAS:217636-48-1
- MF:C24H27ClO6
- Structure:
- Chemical Name:4-(DIPHENYLMETHYL)-1-PIPERAZINEETHANOL DIHYDROCHLORIDE
- CAS:108983-83-1
- MF:C19H26Cl2N2O
- Structure:
- Chemical Name:2-Piperazine-4-amino-6,7-dimethoxyquinazoline
- CAS:60547-97-9
- MF:C14H19N5O2
- Structure:
- Chemical Name:N-ACETYL-4-BENZOQUINONE IMINE
- CAS:50700-49-7
- MF:C8H7NO2
- Structure:
- Chemical Name:DIGOXIGENIN-TETRA-DIGITOXOSIDE
- CAS:31539-05-6
- MF:C47H74O17
- Structure:
- Chemical Name:3-Quinolinecarboxylic acid, 1-cyclopropyl-7-fluoro-1,4-dihydro-6,8-dimethoxy-4-oxo-, ethyl ester
- CAS:2489671-14-7
- MF:C17H18FNO5
- Structure:
- Chemical Name:Bisoprolol Impurity 17
- CAS:109791-19-7
- MF:C15H23NO5
- Structure:
- Chemical Name:Furosemide Impurity 5
- CAS:518336-22-6
- MF:C12H10ClNO3
- Structure:
- Chemical Name:Lumateperone Impurity 2
- CAS:313544-32-0
- MF:C16H19N3O3
- Structure:
- Chemical Name:Pramipexole Impurity 55
- CAS:959012-83-0
- MF:C8H11NO2
- Structure:
- Chemical Name:2-Pyridinecarboxamide, 4,4′-[carbonylbis[imino(3-fluoro-4,1-phenylene)oxy]]bis[N-methyl-
- CAS:2438857-80-6
- MF:C27H22F2N6O5
- Chemical Name:Nicergoline Impurity 01
- CAS:
- MF:
- Chemical Name:impurity 38
- CAS:
- MF:
- Chemical Name:Aprepitant impurity 1
- CAS:
- MF:
- Structure:
- Chemical Name:Benzonitrile, 4-[3-[(acetyloxy)methyl]-4-bromophenoxy]-
- CAS:2227126-09-0
- MF:C16H12BrNO3
- Structure:
- Chemical Name:3-Pyridineacrylonitrile, α-(m-chlorophenyl)-β-hydroxy- (8CI)
- CAS:18206-80-9
- MF:C14H9ClN2O
- Structure:
- Chemical Name:Androsta-3,16-dien-17-ol, acetate, (5α)- (9CI)
- CAS:103088-58-0
- MF:C21H30O2
- Structure:
- Chemical Name:1-Naphthalenamine, 1,2,3,4-tetrahydro-N-methyl-4-phenyl-, (1S,4S)-
- CAS:91797-61-4
- MF:C17H19N
- Structure:
- Chemical Name:2-Pyridineethanamine, N-methyl-N-nitroso-
- CAS:32635-81-7
- MF:C8H11N3O
- Chemical Name:Peramivir Impurity 45
- CAS:
- MF:
- Structure:
- Chemical Name:Pentanamide, 5-(diphenylphosphinyl)-N-ethyl-
- CAS:2512198-63-7
- MF:C19H24NO2P
- Structure:
- Chemical Name:1H-Pyrido[3',4':4,5]pyrrolo[1,2,3-de]quinoxaline-8(7H)-carboxylic acid, 2,3,6b,9,10,10a-hexahydro-, ethyl ester, (6bR,10aS)-
- CAS:313369-17-4
- MF:C16H21N3O2
- Structure:
- Chemical Name:Ergoline-8-methanol, 10-hydroxy-1,6-dimethyl-, 8-(5-bromo-3-pyridinecarboxylate), (8β)-
- CAS:57935-66-7
- MF:C23H24BrN3O3
- Structure:
- Chemical Name:Ethanone, 2-chloro-1-[3-nitro-4-(phenylmethoxy)phenyl]-
- CAS:871266-45-4
- MF:C15H12ClNO4
- Structure:
- Chemical Name:Benzeneethanamine, N-[2-(3,4-dimethoxyphenyl)ethyl]-3,4-dimethoxy-
- CAS:24997-88-4
- MF:C20H27NO4
- Structure:
- Chemical Name:1H-Pyrazolo[3,4-c]pyridine-3-carboxamide, 4,5,6,7-tetrahydro-1-(4-methoxyphenyl)-6-(4-nitrophenyl)-7-oxo-
- CAS:1642569-42-3
- MF:C20H17N5O5
- Structure:
- Chemical Name:1H-Pyrazolo[3,4-c]pyridine-3-carboxamide, 4,5,6,7-tetrahydro-1-(4-methoxyphenyl)-6-(4-nitrophenyl)-7-oxo-
- CAS:1642569-42-3
- MF:C20H17N5O5
- Chemical Name:Avatrombopag Impurity 23
- CAS:
- MF:
- Chemical Name:Avatrombopag Impurity 34
- CAS:
- MF:
- Chemical Name:Cisatracurium besylate impurity11
- CAS:
- MF:
- Structure:
- Chemical Name:Acetamide, N-?[4-?[5-?(acetylamino)?-?2-?hydroxyphenoxy]?phenyl]?-
- CAS:2575516-61-7
- MF:C16H16N2O4
- Chemical Name:Ganciclovir EP Impurity
- CAS:
- MF:
- Chemical Name:Crisaborole Impurity 15
- CAS:
- MF:
- Chemical Name:Latamoxef impurity A
- CAS:
- MF:
- Structure:
- Chemical Name:5,8-Dihydroxy-1,4-bis-[2-(2-hydroxy-ethylamino)-ethylamino]-2,3-dihydro-anthraquinone
- CAS:70476-74-3
- MF:C22H30N4O6
- Structure:
- Chemical Name:Benzonitrile, 2-[(3,4-dihydro-6-methoxy-3-methyl-2,4-dioxo-1(2H)-pyrimidinyl)methyl]-
- CAS:2514763-78-9
- MF:C14H13N3O3
- Structure:
- Chemical Name:Benzonitrile, 2-[(3,4-dihydro-6-methoxy-3-methyl-2,4-dioxo-1(2H)-pyrimidinyl)methyl]-
- CAS:2514763-78-9
- MF:C14H13N3O3
- Structure:
- Chemical Name:5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 3-[(1E)-2-(4-methyl-5-thiazolyl)ethenyl]-8-oxo-7-[(2-phenylacetyl)amino]-, (4-methoxyphenyl)methyl ester, (6R,7R)-
- CAS:104146-11-4
- MF:C29H27N3O5S2
- Chemical Name:Dapagliflozin Impurity 46
- CAS:
- MF:
- Chemical Name:Brexpiprazole Impurity ABCDEFGHJKL
- CAS:
- MF:
- Structure:
- Chemical Name:Acetamide, N-[4-[3-cyclopropyl-5-[(2-fluoro-4-iodophenyl)amino]-3,4,6,7-tetrahydro-6,8-dimethyl-2,4,7-trioxopyrido[4,3-d]pyrimidin-1(2H)-yl]phenyl]-
- CAS:871701-23-4
- MF:C26H23FIN5O4
- Structure:
- Chemical Name:p,p'-(2-pyridylmethylene)bisphenol
- CAS:603-41-8
- MF:C18H15NO2