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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Canagliflozin iMpurity Canagliflozin iMpurity
Vortioxetine iMpurity Vortioxetine iMpurity 853745-55-8 C10H14BrClN2
PD 312236 PD 312236 501666-24-6 C20H35NO11
(17α)-3,3-[1,2-Ethanediylbis(oxy)]-17-hydroxy-19-norpregna-5(10),9(11)-diene-21-nitrile (17α)-3,3-[1,2-Ethanediylbis(oxy)]-17-hydroxy-19-norpregna-5(10),9(11)-diene-21-nitrile 190662-30-7 C22H29NO3
(S)-4-(4-Hydrazinobenzyl)-2-oxazolidinone Hydrochloride (S)-4-(4-Hydrazinobenzyl)-2-oxazolidinone Hydrochloride 139264-57-6 C10H14ClN3O2
1-[4-(4-AMino-6,7-diMethoxy-2-quinazolinyl)-1-piperazinyl]-5-hydroxy-1-pentanone 1-[4-(4-AMino-6,7-diMethoxy-2-quinazolinyl)-1-piperazinyl]-5-hydroxy-1-pentanone 109678-71-9 C19H27N5O4
4-[2-(2-AMino-4,5,6,7-tetrahydro-4,6-dioxo-3H-pyrrolo[2,3-d]pyriMidin-5-yl)ethyl]benzoic Acid 4-[2-(2-AMino-4,5,6,7-tetrahydro-4,6-dioxo-3H-pyrrolo[2,3-d]pyriMidin-5-yl)ethyl]benzoic Acid 193265-47-3 C15H14N4O4
9-(1,3-Dioxolan-2-ylMethyl)-3,9-dihydro-1,3-diMethyl-1H-purine-2,6-dione 9-(1,3-Dioxolan-2-ylMethyl)-3,9-dihydro-1,3-diMethyl-1H-purine-2,6-dione 1174289-18-9 C11H14N4O4
DesMethyl AMisulpride DesMethyl AMisulpride 148516-54-5 C16H25N3O4S
DiMethoxy Dienogest DiMethoxy Dienogest 102193-41-9 C22H31NO3
Desfluoro Rosuvastatin Sodium Salt Desfluoro Rosuvastatin Sodium Salt 847849-66-5 C22H29N3O6S
N-Benzoyl-N-[2-(phenyl)ethyl]-N-carbamic Acid R-Quinuclidinol Ester Succinic Acid Salt N-Benzoyl-N-[2-(phenyl)ethyl]-N-carbamic Acid R-Quinuclidinol Ester Succinic Acid Salt 1798817-92-1 C27H32N2O7
Tadalafil EP IMpurity A Tadalafil EP IMpurity A
(1R,3R,4R)-3-AMino-4-hydroxy-cyclohexanecarboxylic acid ethyl ester (1R,3R,4R)-3-AMino-4-hydroxy-cyclohexanecarboxylic acid ethyl ester 1392745-70-8 C14H25NO5
(S)-3-Hydroxypiperidine (S)-3-Hydroxypiperidine 24211-55-0 C5H11NO
Aprepitant iMpurity B Aprepitant iMpurity B
Aripiprazole iMpurity 4 Aripiprazole iMpurity 4 1424857-63-5 C36H42Cl2N4O4
Avanafil IMpurity 8 (R-Avanafil) Avanafil IMpurity 8 (R-Avanafil)
IRBESARTAN RELATED COMPOUND A (25 MG) (1-PENTANOYLAMINO-CYCLOPENTANECARBOXYLIC ACID [2'-(1H-TETRAZOL-5-YL)-BIPHENYL-4-YLMETHYL]-AMIDE) IRBESARTAN RELATED COMPOUND A (25 MG) (1-PENTANOYLAMINO-CYCLOPENTANECARBOXYLIC ACID [2'-(1H-TETRAZOL-5-YL)-BIPHENYL-4-YLMETHYL]-AMIDE) 748812-53-5 C25H30N6O2
FENOFIBRATE RELATED COMPOUND C (25 MG) (1-METHYLETHYL 2-[[2-[4-(4-CHLOROBENZOYL)PHENOXY]-2-METHYLPROPANOYL]OXY]-2-METHYLPROPANOATE) FENOFIBRATE RELATED COMPOUND C (25 MG) (1-METHYLETHYL 2-[[2-[4-(4-CHLOROBENZOYL)PHENOXY]-2-METHYLPROPANOYL]OXY]-2-METHYLPROPANOATE) 217636-48-1 C24H27ClO6
4-(DIPHENYLMETHYL)-1-PIPERAZINEETHANOL DIHYDROCHLORIDE 4-(DIPHENYLMETHYL)-1-PIPERAZINEETHANOL DIHYDROCHLORIDE 108983-83-1 C19H26Cl2N2O
2-Piperazine-4-amino-6,7-dimethoxyquinazoline 2-Piperazine-4-amino-6,7-dimethoxyquinazoline 60547-97-9 C14H19N5O2
N-ACETYL-4-BENZOQUINONE IMINE N-ACETYL-4-BENZOQUINONE IMINE 50700-49-7 C8H7NO2
DIGOXIGENIN-TETRA-DIGITOXOSIDE DIGOXIGENIN-TETRA-DIGITOXOSIDE 31539-05-6 C47H74O17
Afatinib impurity 82 Afatinib impurity 82
Sugammadex sodium Impurity 51 Sugammadex sodium Impurity 51
Sugammadex sodium Impurity 42 Sugammadex sodium Impurity 42
Org49095 Org49095 2412952-95-3 C71H111NaO48S8
Clopidogrel Impurity 55 Clopidogrel Impurity 55
Ganciclovir EP Impurity Ganciclovir EP Impurity
Crisaborole Impurity 15 Crisaborole Impurity 15
Latamoxef impurity A Latamoxef impurity A
(E)-methyl 3-(((4-(N-methyl-2-(4-methylpiperazin-1-yl)acetamido)phenyl)amino)(phenyl)methylene)-2-oxoindoline-6-carboxylate (E)-methyl 3-(((4-(N-methyl-2-(4-methylpiperazin-1-yl)acetamido)phenyl)amino)(phenyl)methylene)-2-oxoindoline-6-carboxylate
4-Acetyl-2-fluorobiphenyl 4-Acetyl-2-fluorobiphenyl 42771-79-9 C14H11FO
m-xylene-4,alpha,alpha'-triol m-xylene-4,alpha,alpha'-triol 2937-60-2 C8H10O3
Oseltamivir Impurity 107 Oseltamivir Impurity 107
Oseltamivir Impurity 66 Oseltamivir Impurity 66
Benzonitrile, 2-[(3,4-dihydro-6-methoxy-3-methyl-2,4-dioxo-1(2H)-pyrimidinyl)methyl]- Benzonitrile, 2-[(3,4-dihydro-6-methoxy-3-methyl-2,4-dioxo-1(2H)-pyrimidinyl)methyl]- 2514763-78-9 C14H13N3O3
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)- 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)- 104146-11-4 C29H27N3O5S2
Dapagliflozin Impurity 46 Dapagliflozin Impurity 46
Brexpiprazole Impurity ABCDEFGHJKL Brexpiprazole Impurity ABCDEFGHJKL
p,p'-(2-pyridylmethylene)bisphenol p,p'-(2-pyridylmethylene)bisphenol 603-41-8 C18H15NO2
EzetiMibe ring-opening dehydrate iMpurity EzetiMibe ring-opening dehydrate iMpurity 1292292-63-7 C24H21F2NO3
Fondaparinux sodiuM iMpurity 1 Fondaparinux sodiuM iMpurity 1 348625-84-3 C13H21NO19S3
Pitavastatin IMpurity 4 (PP-4) Pitavastatin IMpurity 4 (PP-4) 1422058-54-5 C25H22FNO3
Pregabalin IMpurity Pregabalin IMpurity 159029-27-3 C7H18N2
Valdecoxib 3'-SulfonaMide IMpurity Valdecoxib 3'-SulfonaMide IMpurity 1373038-56-2 C16H14N2O3S
(3R,4R)-4-(2,5-Difluorophenyl)-3-Methyl-4-(1H-1,2,4-triazol-1-ylMethyl)-2-oxetanone (3R,4R)-4-(2,5-Difluorophenyl)-3-Methyl-4-(1H-1,2,4-triazol-1-ylMethyl)-2-oxetanone 483340-20-1 C13H11F2N3O2
6,7-DiMethoxy-2-(4-(tetrahydrofuran-2-carbonyl)piperazin-1-yl)quinazolin-4(1H)-one 6,7-DiMethoxy-2-(4-(tetrahydrofuran-2-carbonyl)piperazin-1-yl)quinazolin-4(1H)-one 1177261-73-2 C19H24N4O5
13-oxo-1,4,7,10-Tetraazabicyclo[8.2.1]tridecane-4,7-diacetic Acid 13-oxo-1,4,7,10-Tetraazabicyclo[8.2.1]tridecane-4,7-diacetic Acid 229312-33-8 C13H22N4O5
rac-Clopidogrel Carboxylic Acid Hydrochloride rac-Clopidogrel Carboxylic Acid Hydrochloride 1015247-88-7 C15H15Cl2NO2S
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
Cabozantinib impurity 43 Cabozantinib impurity 43
Cabozantinib impurity 75 Cabozantinib impurity 75
Cabozantinib impurity 73 Cabozantinib impurity 73
Canagliflozin Impurity 69 Canagliflozin Impurity 69
Dapoxetine impurity 65 Dapoxetine impurity 65
Dapoxetine impurity 59 Dapoxetine impurity 59
Tazobactam Impurity DBT Tazobactam Impurity DBT
diginatin diginatin 52589-12-5 C41H64O15
Thiophene, 2-(2-fluorophenyl)-5-[(5-iodo-2-methylphenyl)methyl]- Thiophene, 2-(2-fluorophenyl)-5-[(5-iodo-2-methylphenyl)methyl]- 2436275-33-9 C18H14FIS
3-Chloro Avanafil 3-Chloro Avanafil
Revefenacin Impurity 2 Revefenacin Impurity 2 1158699-78-5 C14H17NO4
(R)-2-(4-Methoxyphenyl)-1-methylethanamine (R)-2-(4-Methoxyphenyl)-1-methylethanamine 58993-79-6 C10H15NO
N-[5-[(1RS)-2-[benzyl[(1RS)-2-(4-methoxyphenyl)- 1-methylethyl]amino]-1-hydroxyethyl]-2- hydroxyphenyl]formamide N-[5-[(1RS)-2-[benzyl[(1RS)-2-(4-methoxyphenyl)- 1-methylethyl]amino]-1-hydroxyethyl]-2- hydroxyphenyl]formamide 2514947-17-0 C26H30N2O4
NA NA
Cilastatin Impurity H Cilastatin Impurity H
(trans, trans)-3,3'-(1,4,7,10-tetraazacyclododecane-1,7-diyl)bis(butane-1,2,4-triol) (trans, trans)-3,3'-(1,4,7,10-tetraazacyclododecane-1,7-diyl)bis(butane-1,2,4-triol)
Azelastine Impurity K Azelastine Impurity K
(4R,6R)-6-(2-((1S,2S)-2,6-dimethyl-1,2,3,4-tetrahydronaphthalen-1- (4R,6R)-6-(2-((1S,2S)-2,6-dimethyl-1,2,3,4-tetrahydronaphthalen-1-
Carbazochrome Sodium Sulfonate Impurity 1 Carbazochrome Sodium Sulfonate Impurity 1
Rosuvastatin Impurity 147 Rosuvastatin Impurity 147
NA NA
Cetrorelix Impurity 10 Cetrorelix Impurity 10
Cetrorelix Impurity 3 (9-D-Pro) Cetrorelix Impurity 3 (9-D-Pro)
Peramivir Intermediate Impurity 42 Peramivir Intermediate Impurity 42
Nintedanib impurity A drops Nintedanib impurity A drops
Tofacitinib impurity N drops Tofacitinib impurity N drops
Carboprost impurity 999 Carboprost impurity 999
Bumetanide impurity C drops Bumetanide impurity C drops
Apixaban Impurity 79 Apixaban Impurity 79
Troxipide Impurity 6 Troxipide Impurity 6
Piperacillin Impurity K Piperacillin Impurity K
2-(6'-oxo-1'-phenyl-1',6'-dihydro-[2,3'-bipyridin]-5'-yl)benzoic acid 2-(6'-oxo-1'-phenyl-1',6'-dihydro-[2,3'-bipyridin]-5'-yl)benzoic acid
3-Thiophenecarboxylic acid, 4-methyl-5-(4-nitrophenyl)-2-[(propoxycarbonyl)amino]-, ethyl ester 3-Thiophenecarboxylic acid, 4-methyl-5-(4-nitrophenyl)-2-[(propoxycarbonyl)amino]-, ethyl ester 2591260-03-4 C18H20N2O6S
Pemetrexed disodium Impurity 32 Pemetrexed disodium Impurity 32
Androsta-1,4-diene-17-carboxylic acid, 11,16,17-trihydroxy-3-oxo-, (11β,16α,17α)- Androsta-1,4-diene-17-carboxylic acid, 11,16,17-trihydroxy-3-oxo-, (11β,16α,17α)- 1185143-75-2 C20H26O6
(3R,5R)-7-(1-((3R,5R)-6-carboxy-3,5-dihydroxyhexyl)-5-(4-fluorophenyl)-2-isopropyl-4-phenyl-1H-pyrrole-3-carboxamido)-3,5-dihydroxyheptanoic acid (3R,5R)-7-(1-((3R,5R)-6-carboxy-3,5-dihydroxyhexyl)-5-(4-fluorophenyl)-2-isopropyl-4-phenyl-1H-pyrrole-3-carboxamido)-3,5-dihydroxyheptanoic acid
Tazobactam Impurity LTE Tazobactam Impurity LTE
Isavuconazole Impurity 47 Isavuconazole Impurity 47
5,5'-((1R,1'R)-((5,6-diethyl-2,3-dihydro-1H-inden-2-yl)azanediyl)bis(1-hydroxyethane-2,1-diyl))bis(8-(benzyloxy)quinolin-2(1H)-one) 5,5'-((1R,1'R)-((5,6-diethyl-2,3-dihydro-1H-inden-2-yl)azanediyl)bis(1-hydroxyethane-2,1-diyl))bis(8-(benzyloxy)quinolin-2(1H)-one) 753498-27-0 C49H49N3O6
2-((6S,8S,9S,10R,11S,13S,14S,17S)-11-hydroxy-6,10,13-trimethyl-3-oxo- 6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoacetic acid 2-((6S,8S,9S,10R,11S,13S,14S,17S)-11-hydroxy-6,10,13-trimethyl-3-oxo- 6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoacetic acid
Eltrombopag Impurity 37 Eltrombopag Impurity 37 350024-70-3 C14H18N2O
(S)-N-(2-(1-(3-ethoxy-4-methoxyphenyl)-2-((2-hydroxyethyl)sulfonyl)ethyl)-1,3-dioxoisoindolin-4-yl)acetamide (S)-N-(2-(1-(3-ethoxy-4-methoxyphenyl)-2-((2-hydroxyethyl)sulfonyl)ethyl)-1,3-dioxoisoindolin-4-yl)acetamide C23H26N2O8S
2-(4-(2-(4-(1-(2-ethoxyethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-2-methylpropan-1-ol 2-(4-(2-(4-(1-(2-ethoxyethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-2-methylpropan-1-ol C28H39N3O2
Tafluprost Impurity 20 Tafluprost Impurity 20
Rosuvastatin Impurity 149 Rosuvastatin Impurity 149
2-CHLOROMETHYL-5-TRIFLUOROMETHYL-[1,3,4]OXADIAZOLE 2-CHLOROMETHYL-5-TRIFLUOROMETHYL-[1,3,4]OXADIAZOLE 723286-98-4 C4H2ClF3N2O
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