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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Milnacipran IMpurity Milnacipran IMpurity 810696-16-3 C11H11NO
Terbutaline IMpurity 8 Terbutaline IMpurity 8 28924-20-1 C26H30BrNO3
Etoricoxib IMpurity Etoricoxib IMpurity 1350206-14-2 C18H16N2O2S
1-(5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl)-N- ((5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl) methyl)-N-methylmethanamine hydrochloride 1-(5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl)-N- ((5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl) methyl)-N-methylmethanamine hydrochloride C33H28ClF2N5O4S2
Labetalol EP impurity D Labetalol EP impurity D 32780-65-7 C9H13ClN2O3
ethyl (4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(methyl)carbamate ethyl (4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(methyl)carbamate 625115-53-9 C21H21FN8O2
2-[(4-CHLORO-2-NITROPHENYL)AMINO]-BENZOIC ACID 2-[(4-CHLORO-2-NITROPHENYL)AMINO]-BENZOIC ACID 60091-87-4 C13H9ClN2O4
Fulvestrant impurity I Fulvestrant impurity I
Emtricitabine Emtricitabine 61548-81-0 C11H22O3S
tert-butyl 4-(3-nitropyridin-4-yl)piperazine-1-carboxylate tert-butyl 4-(3-nitropyridin-4-yl)piperazine-1-carboxylate 608142-93-4 C14H20N4O4
4-BROMO-1-(TOLUENE-4-SULFONYL)-1,2,3,4-TETRAHYDROBENZO[B]AZEPIN-5-ONE 4-BROMO-1-(TOLUENE-4-SULFONYL)-1,2,3,4-TETRAHYDROBENZO[B]AZEPIN-5-ONE 29489-04-1 C17H16BrNO3S
FEXOFENADINE, METHYL ESTER FEXOFENADINE, METHYL ESTER 154825-96-4 C33H41NO4
Bendamustine Related Impurity 21 Bendamustine Related Impurity 21
Bendamustine Related Impurity 8 Bendamustine Related Impurity 8
Bortezomib Impurity 33 Bortezomib Impurity 33
Moxifloxacin Impurity 31 Moxifloxacin Impurity 31
Pitavastatin Impurity 7 Pitavastatin Impurity 7
Prednisolone Impurity A Prednisolone Impurity A 77017-17-5 C21H26O5
Tegafur Impurity BCB Tegafur Impurity BCB
((2R,3R,4R)-3-(benzoyloxy)-4-chloro-4-Methyl-5-oxotetrahydrofuran-2-yl)Methyl benzoate ((2R,3R,4R)-3-(benzoyloxy)-4-chloro-4-Methyl-5-oxotetrahydrofuran-2-yl)Methyl benzoate 1496551-65-5 C20H17ClO6
2-(4-fluorophenyl)-5-(2-Methylbenzyl)thiophene 2-(4-fluorophenyl)-5-(2-Methylbenzyl)thiophene 2005454-69-1 C18H15FS
AcetaMide, N-[[(5S)-2-oxo-3-[4-(3-oxo-4-Morpholinyl)phenyl]-5-oxazolidinyl]Methyl]- AcetaMide, N-[[(5S)-2-oxo-3-[4-(3-oxo-4-Morpholinyl)phenyl]-5-oxazolidinyl]Methyl]- 1429334-00-8 C16H19N3O5
PSI 7411 PSI 7411 1015073-43-4 C10H14FN2O8P
5-[[4-(Hydroxymethyl)phenoxy]methyl]-3-(1-methylethyl)-2-oxazolidinone 5-[[4-(Hydroxymethyl)phenoxy]methyl]-3-(1-methylethyl)-2-oxazolidinone 1071765-44-0 C14H19NO4
(1S)-1,5-Anhydro-1-C-[3-[[5-(4-fluorophenyl)-2-thienyl]methyl]-4-methylphenyl]-D-glucitol 2,3,4,6-tetrakis(2,2-dimethylpropanoate) (1S)-1,5-Anhydro-1-C-[3-[[5-(4-fluorophenyl)-2-thienyl]methyl]-4-methylphenyl]-D-glucitol 2,3,4,6-tetrakis(2,2-dimethylpropanoate) 1283129-18-9 C44H57FO9S
[1,4'-Bipiperidine]-1'-carboxylic acid [1,4'-Bipiperidine]-1'-carboxylic acid 1026078-50-1 C11H20N2O2
4-[[3-(1-Methylethyl)-2-oxo-5-oxazolidinyl]methoxy]benzaldehyde 4-[[3-(1-Methylethyl)-2-oxo-5-oxazolidinyl]methoxy]benzaldehyde 1173203-26-3 C14H17NO4
Ibrutinib Impurity 9 Ibrutinib Impurity 9 2068022-09-1 C25H21D5N6O4
4-CHLORO-3-HYDROXY BUTYRONITRILE 4-CHLORO-3-HYDROXY BUTYRONITRILE 105-33-9 C4H6ClNO
(Z)-2-propylhept-2-enal (Z)-2-propylhept-2-enal 95667-14-4 C10H18O
(R)-3-AMINO-4-(2,4-DIFLUOROPHENYL)-BUTYRIC ACID-HCL (R)-3-AMINO-4-(2,4-DIFLUOROPHENYL)-BUTYRIC ACID-HCL 1335470-16-0 C10H11F2NO2
(R)-2-((3-methyl-6-(3-((1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)amino)piperidin-1-yl)-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile (R)-2-((3-methyl-6-(3-((1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)amino)piperidin-1-yl)-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile C23H25N7O4
(R)-2-((3-methyl-6-(3-((1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)amino)piperidin-1-yl)-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile (R)-2-((3-methyl-6-(3-((1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)amino)piperidin-1-yl)-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile C23H25N7O4
4,4'-dichloro-3,3'-bis(4-ethoxybenzyl)-1,1'-biphenyl 4,4'-dichloro-3,3'-bis(4-ethoxybenzyl)-1,1'-biphenyl 2176485-21-3 C30H28Cl2O2
N-(2,6-dimethylphenyl)-2-((2,6-dimethylphenyl)amino)acetamide N-(2,6-dimethylphenyl)-2-((2,6-dimethylphenyl)amino)acetamide 294852-91-8 C18H22N2O
N6-propyl-3a,4,5,6,7,7a-hexahydrobenzo[d]thiazole-2,6-diamine N6-propyl-3a,4,5,6,7,7a-hexahydrobenzo[d]thiazole-2,6-diamine 1052691-22-1 C10H19N3S
3-pentylisoindolin-1-one 3-pentylisoindolin-1-one 691863-84-0 C13H17NO
(1R,3R)-2-acetyl-1-(benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro- 1H-pyrido[3,4-b]indole-3-carboxylate (1R,3R)-2-acetyl-1-(benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro- 1H-pyrido[3,4-b]indole-3-carboxylate 1598416-05-7 C22H20N2O5
Rivaroxaban Impurity 61 Rivaroxaban Impurity 61 1643354-27-1 C32H30N4O8
Rivaroxaban Impurity 74 Rivaroxaban Impurity 74
Sitafloxacin Impurity 6 Sitafloxacin Impurity 6
Ticagrelor Related Compound 75 Ticagrelor Related Compound 75
Ticagrelor Related Compound 93 Ticagrelor Related Compound 93 2207528-55-8 C23H28F2N6O4S
Vonoprazan Impurity 24 Vonoprazan Impurity 24 1807642-41-6 C16H14FN3O2S
Vonoprazan Impurity 35 Vonoprazan Impurity 35
Adefovir Impurity 2 Adefovir Impurity 2
Avibactam Impurity R Avibactam Impurity R
Blonanserin Impurity L Blonanserin Impurity L
Cefazolin USP Impurity E Cefazolin USP Impurity E
Exemestane Impurity 5 Exemestane Impurity 5
Medetomidine Impurity 28 Medetomidine Impurity 28 2240179-64-8 C23H28N2
Peramivir Impurity 4 Peramivir Impurity 4 229615-12-7 C15H28N4O4
Peramivir Impurity 9 Peramivir Impurity 9
PidotimodImpurity T PidotimodImpurity T
EMpagliflozin iMpurity 9 EMpagliflozin iMpurity 9
EMpagliflozin iMpurity 14 EMpagliflozin iMpurity 14 2137418-13-2 C23H27ClO8
570403-04-2 570403-04-2 570403-04-2 C23H24Cl3N5OS2
ibrutinib iMpurity A ibrutinib iMpurity A
Sunitinib iMpurity E Sunitinib iMpurity E
Rosuvastatin EP impurity H Rosuvastatin EP impurity H 1335110-44-5 C22H28FN3O6S
Saxagliptin Impurity 4 (Deoxy Saxagliptin) Saxagliptin Impurity 4 (Deoxy Saxagliptin)
Betamethasone EP Impurity D Betamethasone EP Impurity D 52619-05-3 C25H33FO7
Dihydropenicillin F Potassium Salt Dihydropenicillin F Potassium Salt 31447-86-6 C14H23KN2O4S
Etoricoxib Impurity 7 Etoricoxib Impurity 7 646459-39-4 C20H21N3O2S
Mupirocin Impurity D Mupirocin Impurity D C26H44O9
Pazopanib Related Compound 2 Pazopanib Related Compound 2 1226500-02-2 C26H23ClN10
Phenylephrine EP Impurity D Phenylephrine EP Impurity D 1367567-95-0 C16H19NO2
Verapamil Impurity O Verapamil Impurity O 959011-16-6 C27H38N2O4
1,1′-[(1-Methylethyl)imino]bis[3-[4-(2-methoxyethyl)phenoxy]-2-propanol hydrochloride 1,1′-[(1-Methylethyl)imino]bis[3-[4-(2-methoxyethyl)phenoxy]-2-propanol hydrochloride 1486464-40-7 C27H42ClNO6
4'-FLUOROCYCLOPROPANECARBOXANILIDE 4'-FLUOROCYCLOPROPANECARBOXANILIDE 2354-89-4 C10H10FNO
methyl(E)-4-(methylamino)but-2-enoate methyl(E)-4-(methylamino)but-2-enoate 915788-22-6 C6H11NO2
methyl(E)-4-(methylamino)but-2-enoate methyl(E)-4-(methylamino)but-2-enoate 915788-22-6 C6H11NO2
Levomilnacipran impurity Levomilnacipran impurity
Sofosbuvir IMpurity 4 Sofosbuvir IMpurity 4
1,3-bis(4-isobutylphenyl)butan-1-one 1,3-bis(4-isobutylphenyl)butan-1-one C24H32O
6-isobutyl-3-methyl-2,3-dihydro-1H-inden-1-one 6-isobutyl-3-methyl-2,3-dihydro-1H-inden-1-one 1340024-54-5 C14H18O
Edoxaban impurity 1 Edoxaban impurity 1 41374-72-5 C9H10N2O3
Canagliflozin Impurity 18 Canagliflozin Impurity 18
Canagliflozin Impurity 23 Canagliflozin Impurity 23
Carfilzomib Impurity 4 Carfilzomib Impurity 4
Lenvatinib Impurity 2 Lenvatinib Impurity 2 2380197-90-8 C28H22ClN5O5
FeBuxostat Impurity 33 FeBuxostat Impurity 33 100118-38-5 C12H14O5
(S)-3-(4-phenoxyphenyl)-1-(piperidin-3-yl) (S)-3-(4-phenoxyphenyl)-1-(piperidin-3-yl) 1642630-12-3 C22H22N6O
Latamoxef Impurity 1 Latamoxef Impurity 1 75007-70-4 C19H20N6O7S
Amlodipine iMpurity K Amlodipine iMpurity K 1809326-44-0 C18H21ClN2O5
Cabozantinib impurity 4 Cabozantinib impurity 4 95932-39-1 C11H15NO3
Rosuvastatin EP Impurity C Rosuvastatin EP Impurity C 1620823-61-1 C22H27FN3NaO6S
6,7-bis(2-methoxyethoxy)-N-phenylquinazolin-4-amine 6,7-bis(2-methoxyethoxy)-N-phenylquinazolin-4-amine 1145671-52-8 C20H23N3O4
(3R,4R,5S)-ethyl 4-acetamido-5-amino-3-isopropoxycyclohex-1-enecarboxylate (3R,4R,5S)-ethyl 4-acetamido-5-amino-3-isopropoxycyclohex-1-enecarboxylate 1052063-36-1 C14H24N2O4
4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate 4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate 941296-96-4 C16H28N2O4
(2R,5S)-5-(4-amino-5-fluoro-2-oxopyrimidin-1(2H)-yl)-1,3-oxathiolane-2-carboxylic acid (2R,5S)-5-(4-amino-5-fluoro-2-oxopyrimidin-1(2H)-yl)-1,3-oxathiolane-2-carboxylic acid C8H8FN3O4S
Amlodipine Impurity 10 Amlodipine Impurity 10 2170104-51-3 C26H31ClN2O8S
Apixaban Impurity 15 Apixaban Impurity 15 1466571-07-2 C21H20N4O4
Clopidogrel Impurity 8 Clopidogrel Impurity 8 C15H14ClNO2S
Acyclovir Impurity I: 7,9'-[Ethylene-bis(oxymethylene)] Bis (2-amino-1-9-dihydro-6H-purin-6-one) Acyclovir Impurity I: 7,9'-[Ethylene-bis(oxymethylene)] Bis (2-amino-1-9-dihydro-6H-purin-6-one) 1797832-75-7 C14H16N10O4
Nilotinib genotoxic impurity 3 Nilotinib genotoxic impurity 3 915711-42-1 C19H17F3N4O
Dapagliflozin Open Ring Dapagliflozin Open Ring 2100872-88-4 C21H27ClO7
Rortezide impurity Rortezide impurity
Aprepitant Impurity 2 Aprepitant Impurity 2
Cabozantinib Impurity A Cabozantinib Impurity A
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