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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Amifostine Impurity 7 Amifostine Impurity 7 174397-83-2 C7H16Br2N2
Bendamustine Impurity 31 Bendamustine Impurity 31
Carbidopa Impurity 2 Carbidopa Impurity 2 1361017-74-4 C11H16N2O4
Cefazolin Impurity 2 Cefazolin Impurity 2
Cefminox Sodium Impurity 8 Cefminox Sodium Impurity 8
Dapagliflozin Impurity 28 Dapagliflozin Impurity 28
Erlotinib Impurity 51 Erlotinib Impurity 51 115665-66-2 C8H6BrNO2
Oseltamivir Impurity 18 Oseltamivir Impurity 18
Plerixafor Impurity 6 Plerixafor Impurity 6
Pregabalin Impurity 49 Pregabalin Impurity 49 1568110-05-3 C10H21NO2
Rivaroxaban Impurity 79 Rivaroxaban Impurity 79 1642601-00-0 C38H38N4O12
Rocuronium Bromide Impurity 37 Rocuronium Bromide Impurity 37
Rosuvastatin Impurity 4 Rosuvastatin Impurity 4 1899869-35-2 C19H22FN3O3S
5-Methyl-3-phenylisoxazole-4-carboxylic acid 5-Methyl-3-phenylisoxazole-4-carboxylic acid 1136-45-4 C11H9NO3
Bendamustine Impurity 26 Bendamustine Impurity 26
Canagliflozin Impurity 26 Canagliflozin Impurity 26
Edoxaban Impurity 37 Edoxaban Impurity 37 2081883-50-1 C14H27N3O3
Imatinib Impurity 10 Imatinib Impurity 10
(2S,4R)-5-(Biphenyl-4-yl)-4-[(tert-butoxycarbonyl)amino]-2-methylpentanoic acid (2S,4R)-5-(Biphenyl-4-yl)-4-[(tert-butoxycarbonyl)amino]-2-methylpentanoic acid 1012341-54-6 C23H29NO4
Calcium bis[4-{[(1S,3R)-1-([1,1'-biphenyl]-4-ylmethyl)-3-methyl-4-oxo-4-(propan-2-yloxyl)butyl]amino}-4-oxobutanoate] Calcium bis[4-{[(1S,3R)-1-([1,1'-biphenyl]-4-ylmethyl)-3-methyl-4-oxo-4-(propan-2-yloxyl)butyl]amino}-4-oxobutanoate] C50H60CaN2O10
3-(4-methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)benzamide 3-(4-methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)benzamide 917391-28-7 C12H10F3N3O
Alogliptin Impurity E Alogliptin Impurity E
Alogliptin Impurity E Alogliptin Impurity E
Carbamic acid, N-[(1R)-2-[5-(2-fluoro-3-methoxyphenyl)-3-[[2-fluoro-6-(trifluoromethyl)phenyl]methyl]-3,6-dihydro-4-methyl-2,6-dioxo-1(2H)-pyrimidinyl]-1-phenylethyl]-, 1,1-dimethylethyl ester Carbamic acid, N-[(1R)-2-[5-(2-fluoro-3-methoxyphenyl)-3-[[2-fluoro-6-(trifluoromethyl)phenyl]methyl]-3,6-dihydro-4-methyl-2,6-dioxo-1(2H)-pyrimidinyl]-1-phenylethyl]-, 1,1-dimethylethyl ester 830346-51-5 C33H32F5N3O5
Baicalein 6-O-glucoside Baicalein 6-O-glucoside 28279-72-3 C21H20O10
Levofloxacin Impurity 19 Levofloxacin Impurity 19 C18H20FN3O4
Olanzapine Impurity K Olanzapine Impurity K C17H20N4S
Ticagrelor Related Compound 55 Ticagrelor Related Compound 55
Ticagrelor Related Compound 73 Ticagrelor Related Compound 73
Vildagliptin Impurity 10 Vildagliptin Impurity 10
Cefaclor Impurity 2 Cefaclor Impurity 2 722547-49-1 C17H18N2O3
Cefodizime Impurity F Cefodizime Impurity F
Olaparib Impurity F Olaparib Impurity F
Ornidazole Impurity G Ornidazole Impurity G
Pidotimod Impurity L Pidotimod Impurity L
Tadalafil Impuirty 20 Tadalafil Impuirty 20 2924098-58-6
Tenofovir Impurity 53 Tenofovir Impurity 53
(S)-3-(4-benzylphenoxy)tetrahydrofuran (S)-3-(4-benzylphenoxy)tetrahydrofuran C17H18O2
Ampicillin Ampicillin 1207726-28-0 C24H26N4O5S
ethyl 2-(4-(sec-butoxy)-3-cyanophenyl)-4-methylthiazole-5- carboxylate ethyl 2-(4-(sec-butoxy)-3-cyanophenyl)-4-methylthiazole-5- carboxylate 2375033-35-3 C18H20N2O3S
(S)-Indacaterol (S)-Indacaterol 1384188-70-8 C24H29ClN2O3
Aripiprazole Impurity 47 Aripiprazole Impurity 47 2250242-47-6 C27H33Cl2N3O3
Aripiprazole Impurity 47 Aripiprazole Impurity 47 2250242-47-6 C27H33Cl2N3O3
Cefminox Sodium Impurity 3 Cefminox Sodium Impurity 3 1420072-83-8 C16H21N7O6S4
Edaravone Impurity 26 Edaravone Impurity 26 152494-76-3
Levofloxacin Impurity 24 Levofloxacin Impurity 24 C18H20FN3O4
Parecoxib N-Oxide Parecoxib N-Oxide
Rosuvastatin Impurity 84 Rosuvastatin Impurity 84
Timolol EP Impurity I Timolol EP Impurity I
172967-64-5 172967-64-5 172967-64-5 C18H16ClNO3
Pregabalin Impurity PD0224377 Pregabalin Impurity PD0224377 501665-97-0 C14H25NO6
Nintedanib Impurity 24 Nintedanib Impurity 24
2-(((3,4-dimethoxypyridin-2-yl)methyl)thio)-1H-benzo[d] imidazol-5-ol 2-(((3,4-dimethoxypyridin-2-yl)methyl)thio)-1H-benzo[d] imidazol-5-ol 1166386-02-2 C15H15N3O3S
N-((2-(5-methyl-4-phenylisoxazol-3-yl)phenyl)sulfonyl)propionamide N-((2-(5-methyl-4-phenylisoxazol-3-yl)phenyl)sulfonyl)propionamide 2304623-38-7 C19H18N2O4S
RocuroniuMbroMide iMpurity B RocuroniuMbroMide iMpurity B
TetrazepaM IMp. C (EP): 7-Chloro-5-cyclohexyl-1-Methyl-1,3-dihydro-2H-1,4-benzodiazepin-2-one TetrazepaM IMp. C (EP): 7-Chloro-5-cyclohexyl-1-Methyl-1,3-dihydro-2H-1,4-benzodiazepin-2-one
bis(2-(7-Methoxynaphthalen-1-yl)ethyl)aMine bis(2-(7-Methoxynaphthalen-1-yl)ethyl)aMine 1623104-92-6 C26H28ClNO2
bis(2-(7-Methoxynaphthalen-1-yl)ethyl)aMine bis(2-(7-Methoxynaphthalen-1-yl)ethyl)aMine 1623104-92-6 C26H28ClNO2
Methyl 2-oxo-3-((2'-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)biphenyl-4-yl)Methyl)-2,3-dihydro-1H-benzo[d]iMidazole-4-carboxylate Methyl 2-oxo-3-((2'-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)biphenyl-4-yl)Methyl)-2,3-dihydro-1H-benzo[d]iMidazole-4-carboxylate 1403474-78-1 C24H18N4O5
Thiazolylacetyl glycine oxiMe Thiazolylacetyl glycine oxiMe 178949-03-6 C7H8N4O4S
3-O-Decladinosyl-6-O-Methylerythronolide A 3-O-Decladinosyl-6-O-Methylerythronolide A 118058-74-5 C30H55NO10
Desmethyl Ranolazine Desmethyl Ranolazine 755711-09-2 C23H31N3O3
P-[[(1S)-2-(6-AMino-9H-purin-9-yl)-1-Methylethoxy]Methyl]-phosphonic Acid Monoethyl Ester P-[[(1S)-2-(6-AMino-9H-purin-9-yl)-1-Methylethoxy]Methyl]-phosphonic Acid Monoethyl Ester 1255525-18-8 C11H18N5O4P
8-(2,3-Dichlorophenyl)-8-aza-5-azoniaspiro[4.5]decane BroMide 8-(2,3-Dichlorophenyl)-8-aza-5-azoniaspiro[4.5]decane BroMide 795313-24-5 C14H19BrCl2N2
8-(2,3-Dichlorophenyl)-8-aza-5-azoniaspiro[4.5]decane BroMide 8-(2,3-Dichlorophenyl)-8-aza-5-azoniaspiro[4.5]decane BroMide 795313-24-5 C14H19BrCl2N2
9-MethoxyMethyl Guanine 9-MethoxyMethyl Guanine 1202645-50-8 C7H9N5O2
ClindaMycin 3-PalMitate ClindaMycin 3-PalMitate 68225-59-2 C34H63ClN2O6S
EltroMbopag Methyl Ester EltroMbopag Methyl Ester 1246929-01-0 C26H24N4O4
ErythroMycin A 6,9-IMino Ether ErythroMycin A 6,9-IMino Ether 99290-97-8 C37H66N2O12
α,α'-Bis[(2-Methoxyphenoxy)Methyl]-1,4-piperazinediethanol α,α'-Bis[(2-Methoxyphenoxy)Methyl]-1,4-piperazinediethanol 333749-57-8 C24H34N2O6
Ticagrelor IMpurity E Ticagrelor IMpurity E 1402150-34-8 C26H30F2N6O5S
Benzenebutanoicacid,b-[[(1,1-diMethylethoxy)carbonyl]aMino]-2,4,5-trifluoro-,Methylester,(bR)- Benzenebutanoicacid,b-[[(1,1-diMethylethoxy)carbonyl]aMino]-2,4,5-trifluoro-,Methylester,(bR)- 881995-73-9 C16H20F3NO4
Bosutinib Impurity 1 Bosutinib Impurity 1 1460227-29-5 C18H13Cl2N3O3
S,S-Efinaconazole S,S-Efinaconazole 164650-45-7 C18H22F2N4O
BendaMustine IMpurity BendaMustine IMpurity
Acetic acid, 2-chloro-2-[2-(2-Methoxyphenyl)hydrazinylidene]-, ethyl ester Acetic acid, 2-chloro-2-[2-(2-Methoxyphenyl)hydrazinylidene]-, ethyl ester 85014-68-2 C11H13ClN2O3
D-Alanine, N-[[P(S),2'R]-2'-cyano-2'-deoxy-2'-Methyl-P-phenyl-5'-cytidylyl]-, 1-Methylethyl ester D-Alanine, N-[[P(S),2'R]-2'-cyano-2'-deoxy-2'-Methyl-P-phenyl-5'-cytidylyl]-, 1-Methylethyl ester 1496552-28-3 C22H29FN3O9P
D-Glucitol, 1,5-anhydro-1-C-[4-Methyl-3-[(5-phenyl-2-thienyl)Methyl]phenyl]-, (1S)- D-Glucitol, 1,5-anhydro-1-C-[4-Methyl-3-[(5-phenyl-2-thienyl)Methyl]phenyl]-, (1S)- 842133-16-8 C24H26O5S
Phthalic acid, 3,3'-azoxydi- (8CI) Phthalic acid, 3,3'-azoxydi- (8CI) 22895-28-9 C16H10N2O9
(alphaE)-alpha-[(3,4-Dihydroxy-5-nitrophenyl)methylene]-beta-oxo-1-piperidinepropanenitrile (alphaE)-alpha-[(3,4-Dihydroxy-5-nitrophenyl)methylene]-beta-oxo-1-piperidinepropanenitrile 1150310-15-8 C15H15N3O5
(2E)-2-Cyano-3-(3-ethoxy-4-hydroxy-5-nitrophenyl)-N,N-diethyl-2-propenamide (2E)-2-Cyano-3-(3-ethoxy-4-hydroxy-5-nitrophenyl)-N,N-diethyl-2-propenamide 857629-79-9 C16H19N3O5
(R,E)-ethyl 5-([1,1'-biphenyl]-4-yl)-4-((tert-butoxycarbonyl)aMino)-2-Methylpent-2-enoate (R,E)-ethyl 5-([1,1'-biphenyl]-4-yl)-4-((tert-butoxycarbonyl)aMino)-2-Methylpent-2-enoate 149709-59-1 C25H31NO4
1-(3-AMinopropyl)-4-(2-Methoxyphenyl)piperazine 97% 1-(3-AMinopropyl)-4-(2-Methoxyphenyl)piperazine 97% 20529-23-1 C14H23N3O
(R)-3-((S)-5-(4-fluorophenyl)-5-hydroxypentanoyl)-4-phenyloxazolidin-2-one (R)-3-((S)-5-(4-fluorophenyl)-5-hydroxypentanoyl)-4-phenyloxazolidin-2-one 404874-94-8 C20H20FNO4
(S)-3-((S)-5-hydroxy-5-phenylpentanoyl)-4-phenyloxazolidin-2-one (S)-3-((S)-5-hydroxy-5-phenylpentanoyl)-4-phenyloxazolidin-2-one C20H21NO4
Apixaban Impurity 20 Apixaban Impurity 20 1421823-20-2 C27H29ClN4O5
Posaconazole iMpurity 4 Posaconazole iMpurity 4 2125944-53-6 C30H35N5O3
Everolimus Ring-Opening Impurity Everolimus Ring-Opening Impurity 1708118-13-1 C53H83NO14
Topiroxostat Impurity 6 Topiroxostat Impurity 6 2044704-63-2 C7H8N4O2
Dienogest Impurity I Dienogest Impurity I 65928-65-6 C20H27NO2
Febuxostat Impurity 8 Febuxostat Impurity 8 144060-62-8 C16H17NO4S
Lornoxicam Impurity 9 Lornoxicam Impurity 9 70374-36-6 C6H6ClNO4S2
Ticagrelor Related Compound 3 Ticagrelor Related Compound 3 88756-83-6 C8H15NO3
135270-10-9 135270-10-9 135270-10-9 C12H11F2N3O
Tadalafil EP Impurity Tadalafil EP Impurity 479545-76-1 C21H16N2O5
Vonoprazan Impurity C Vonoprazan Impurity C
(5RS)-5-Ethyl-2,6-diimino-5-phenyl-1,2,5,6-tetrahydropyrimidin-4(3H)-one (5RS)-5-Ethyl-2,6-diimino-5-phenyl-1,2,5,6-tetrahydropyrimidin-4(3H)-one 69125-70-8 C12H14N4O
(2S,3R)-2-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)butane-2,3-diol (2S,3R)-2-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)butane-2,3-diol 135272-36-5 C12H13F2N3O2
Cycloocta[b]pyridine, 2-(4-ethyl-1-piperazinyl)-5,6,7,8,9,10-hexahydro-4-phenyl- Cycloocta[b]pyridine, 2-(4-ethyl-1-piperazinyl)-5,6,7,8,9,10-hexahydro-4-phenyl- 132810-75-4 C23H31N3
(R)-1-(3-(4-amino-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidin-1-yl)propan-1-one (R)-1-(3-(4-amino-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidin-1-yl)propan-1-one 1839099-22-7 C25H26N6O2
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