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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Moxidectin Moxidectin 119718-45-5 C37H53NO8
GDZISNMJFAJFMR-BEQCQUFHSA-M GDZISNMJFAJFMR-BEQCQUFHSA-M 2024603-92-5 C58H74N2O15S
GJXNGCFWGJQETE-UHFFFAOYSA-N GJXNGCFWGJQETE-UHFFFAOYSA-N 1796891-27-4 C29H34N6O4
ethyl N-[(2,5-dichlorophenyl)carbonyl]glycinate ethyl N-[(2,5-dichlorophenyl)carbonyl]glycinate 328283-61-0 C11H11Cl2NO3
Irbesartan Impurity 4 Irbesartan Impurity 4 945540-26-1 C21H20N6O
BAUCJPGULMYPTE-UHFFFAOYSA-N BAUCJPGULMYPTE-UHFFFAOYSA-N 2097683-67-3 C24H29NO4
Entecavir Impurity 6 Entecavir Impurity 6 1354695-82-1 C26H27N5O3
Bis(L-Valine) Ester Ganciclovir TFA Salt Bis(L-Valine) Ester Ganciclovir TFA Salt 130914-71-5 C19H31N7O6
6-Chloro-6-defluoro Ciprofloxacin 6-Chloro-6-defluoro Ciprofloxacin 93106-58-2 C17H18ClN3O3
5-[(4-amino-2-carboxyphenyl)amino]-2-hydroxybenzoic acid 5-[(4-amino-2-carboxyphenyl)amino]-2-hydroxybenzoic acid 1797983-23-3 C14H12N2O5
Afatinib Impurity M Afatinib Impurity M
Ornidazole Impurity Ornidazole Impurity 1100750-18-2
4-(3-nitrophenyl)-3-Morpholinone 4-(3-nitrophenyl)-3-Morpholinone 845729-43-3 C10H10N2O4
5,11-dihydro-6H-11-ethyl-4-Methyl-dipyrido[3,2-b:2',3'-e][1,4]diazepin-6-one 5,11-dihydro-6H-11-ethyl-4-Methyl-dipyrido[3,2-b:2',3'-e][1,4]diazepin-6-one 133627-17-5 C14H14N4O
(1R,3S)-1-(1,3-Benzodioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic Acid Methyl Ester (1R,3S)-1-(1,3-Benzodioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic Acid Methyl Ester 171596-44-4 C20H18N2O4
Amlodipine-d4 Amlodipine-d4 1185246-14-3 C20H25ClN2O5
N,N-bis((5-(2-fluorophenyl)-1H-pyrrol-3-yl)methyl)pyridine-3-sulfonamide N,N-bis((5-(2-fluorophenyl)-1H-pyrrol-3-yl)methyl)pyridine-3-sulfonamide 2514957-29-8 C27H22F2N4O2S
2,4(1H,3H)-Pyrimidinedione, 1-β-L-ribofuranosyl-, 4-oxime (9CI) 2,4(1H,3H)-Pyrimidinedione, 1-β-L-ribofuranosyl-, 4-oxime (9CI) 402725-23-9 C9H13N3O6
1H-Indole-2-sulfonic acid, 6-hydroxy-1-methyl- 1H-Indole-2-sulfonic acid, 6-hydroxy-1-methyl- 2271443-87-7 C9H9NO4S
methyl 4-hydroxy-2-oxopyrrolidine-1-acetate methyl 4-hydroxy-2-oxopyrrolidine-1-acetate 85614-52-4 C7H11NO4
Sitagliptin EP Impurity 5 Sitagliptin EP Impurity 5
Simvastatin Impurity 6 Simvastatin Impurity 6
Anastrozole Impurity 14 Anastrozole Impurity 14
Pemetrexed Impurity 42 Pemetrexed Impurity 42
2-(6-Aminopurin-9-yl)ethanol 2-(6-Aminopurin-9-yl)ethanol 707-99-3 C7H9N5O
9-Azabicyclo[3.3.1]Nonane-9-Acetic Acid, 3-(Ethoxycarbonyl)-7-Oxo-, Ethyl Ester 9-Azabicyclo[3.3.1]Nonane-9-Acetic Acid, 3-(Ethoxycarbonyl)-7-Oxo-, Ethyl Ester 115956-03-1 C15H23NO5
Cefathiamidine Impurity F Cefathiamidine Impurity F
1-(Bromophenylmethyl)-4-chlorobenzene 1-(Bromophenylmethyl)-4-chlorobenzene 948-54-9 C13H10BrCl
Flomoxef oxidation impurities Flomoxef oxidation impurities
Toltrazuril Impurity 1 Toltrazuril Impurity 1
((2R,3R,5S)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-4,4-difluoro-3-hydroxytetrahydrofuran-2-yl)methyl benzoate ((2R,3R,5S)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-4,4-difluoro-3-hydroxytetrahydrofuran-2-yl)methyl benzoate
Aprepitant Impurity 53 Aprepitant Impurity 53
Cetrorelix Impurity 21 Cetrorelix Impurity 21
Brivaracetam Impurity 43 Brivaracetam Impurity 43
NA NA
Peramivir Intermediate Impurity 37 Peramivir Intermediate Impurity 37
Peramivir Diastereomer Impurity 1 Peramivir Diastereomer Impurity 1
NA NA
Canagliflozin Impurities 999 Canagliflozin Impurities 999
1,4,8,11-tetraazacyclotetradecane sodium chelation 1,4,8,11-tetraazacyclotetradecane sodium chelation
NA NA
4-Methoxy-2,3,5-trimethylpyride-N-oxide 4-Methoxy-2,3,5-trimethylpyride-N-oxide 86604-80-0 C9H13NO2
1-BOC-4-(5-NITRO-2-PYRIDYL)PIPERAZINE 1-BOC-4-(5-NITRO-2-PYRIDYL)PIPERAZINE 193902-78-2 C14H20N4O4
(1R,3r,5S)-8-methyl-8-azabicyclo[3.2.1]octan-3-yl 2-phenylacetate (1R,3r,5S)-8-methyl-8-azabicyclo[3.2.1]octan-3-yl 2-phenylacetate
Relugolix Impurity 25 Relugolix Impurity 25
Lumateperone Impurity 5 Lumateperone Impurity 5
Sugammadex Sodium Impurity ORG139131-1 Sugammadex Sodium Impurity ORG139131-1
2-[4-(Azidomethyl)phenyl]benzoic acid 2-[4-(Azidomethyl)phenyl]benzoic acid
2-[(2-AZIDOETHOXY)METHYL]-4-(2-CHLOROPHENYL)-3-ETHOXYCARBONYL-5-METHOXYCARBONYL)-6-METHYL-1,4-DIHYDROPYRIDINE 2-[(2-AZIDOETHOXY)METHYL]-4-(2-CHLOROPHENYL)-3-ETHOXYCARBONYL-5-METHOXYCARBONYL)-6-METHYL-1,4-DIHYDROPYRIDINE 88150-46-3 C20H23ClN4O5
((6aR,9R,10aR)-7-methyl-4,6,6a,7,8,9,10,10a-octahydroindolo[4,3-fg]quinolin-9-yl)methanol acetic acid salt ((6aR,9R,10aR)-7-methyl-4,6,6a,7,8,9,10,10a-octahydroindolo[4,3-fg]quinolin-9-yl)methanol acetic acid salt
Brivaracetam Impurity 56 Brivaracetam Impurity 56
Oxytocin Impurity 3 Oxytocin Impurity 3
Rosuvastatin Impurity 158 Rosuvastatin Impurity 158
Rosuvastatin Impurity 139 Rosuvastatin Impurity 139
(S)-2-(BENZYLOXY)PROPIONAL (S)-2-(BENZYLOXY)PROPIONAL 81445-44-5 C10H12O2
1-Chloro-2-[(4-ethoxyphenyl)methyl]benzene 1-Chloro-2-[(4-ethoxyphenyl)methyl]benzene 1662702-90-0 C15H15ClO
Mupirocin iMpurity F Mupirocin iMpurity F C26H44O9
Palbociclib Impurity 87 Palbociclib Impurity 87 571189-51-0 C25H31N7O2
Beclometasone Impurity U Beclometasone Impurity U
Atracurium Impurity 15 Iodide（Cisatracurium Besilate EP Impurity O Iodide） Atracurium Impurity 15 Iodide（Cisatracurium Besilate EP Impurity O Iodide） 155913-31-8 C38H49NO11S
Vortioxetine Impurity 29 Vortioxetine Impurity 29 1928741-88-1 C18H23ClN2S
Neratinib Impurity 12 Neratinib Impurity 12 544417-27-8 C33H37ClN6O3
Ceftriaxone Sodium impurity 2 Ceftriaxone Sodium impurity 2
Enrofloxacin EP Impurity E Enrofloxacin EP Impurity E 1369495-59-9 C19H22ClN3O3
147027-08-5 147027-08-5 147027-08-5 C14H24O4S
Cloxacillin EP Impurity A Cloxacillin EP Impurity A 1642629-96-6 C19H20ClN3O6S
Entacapone Impurity 7 Entacapone Impurity 7 1215039-66-9 C12H10N2O6
Rosuvastatin Impurity 124 Rosuvastatin Impurity 124
Ethyl 5,6-dichloro-3,4-dihydro-2(1H)-iminoquinazoline-3-acetate hydrobromide Ethyl 5,6-dichloro-3,4-dihydro-2(1H)-iminoquinazoline-3-acetate hydrobromide 70381-75-8 C12H14BrCl2N3O2
4-(3,4-Dichlorophenyl)-1,2,3,4-Tetrahydro- 4-(3,4-Dichlorophenyl)-1,2,3,4-Tetrahydro- 79617-95-1 C17H17Cl2N
Avatrombopag Impurity 77 Avatrombopag Impurity 77
methyl 5-((4-(3-carbamoyl-1-(4-methoxyphenyl)-7-oxo-1,4,5,7-tetrahydro-6H-pyrazolo[3,4-c]pyridin-6-yl)phenyl)amino)pentanoate methyl 5-((4-(3-carbamoyl-1-(4-methoxyphenyl)-7-oxo-1,4,5,7-tetrahydro-6H-pyrazolo[3,4-c]pyridin-6-yl)phenyl)amino)pentanoate
N-(4-((3-chloro-4-fluorophenyl)amino)-7-fluoroquinazolin-6-yl)-4-(dimethylamino)butanamide N-(4-((3-chloro-4-fluorophenyl)amino)-7-fluoroquinazolin-6-yl)-4-(dimethylamino)butanamide
Ertapenem Impurity A(USP) Ertapenem Impurity A(USP)
D-Glutamic acid, 4-(cyanomethyl)-N-[(1,1-dimethylethoxy)carbonyl]-, 1,5-dimethyl ester, (4S)-rel- D-Glutamic acid, 4-(cyanomethyl)-N-[(1,1-dimethylethoxy)carbonyl]-, 1,5-dimethyl ester, (4S)-rel- 2740644-40-8 C14H22N2O6
2-hydroxy-3-oxobutyl 2-ethoxy-1-((2'-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)-[1,1'-biphenyl]-4-yl)methyl)-1H-benzo[d]imidazole-7-carboxylate 2-hydroxy-3-oxobutyl 2-ethoxy-1-((2'-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)-[1,1'-biphenyl]-4-yl)methyl)-1H-benzo[d]imidazole-7-carboxylate
INDEX NAME NOT YET ASSIGNED INDEX NAME NOT YET ASSIGNED 2731089-65-7 C27H34N2O6
2-(2-ethoxy-3-((4-ethylpiperazin-1-yl)sulfonyl)phenyl)-5-methyl-7-propylimidazo[5,1-f][1,2,4]triazin-4(1H)-one 2-(2-ethoxy-3-((4-ethylpiperazin-1-yl)sulfonyl)phenyl)-5-methyl-7-propylimidazo[5,1-f][1,2,4]triazin-4(1H)-one
Bumetanide Photodegradable Impurity 15 Bumetanide Photodegradable Impurity 15
Bisoprolol Impurity 48 Bisoprolol Impurity 48
Cyclopentanecarboxylic acid, 3-[(1S)-1-(acetylamino)-2-ethylbutyl]-4-amino-2-hydroxy-, methyl ester, (1S,2S,3R,4R)-, mono(trifluoroacetate) (salt) (9CI) Cyclopentanecarboxylic acid, 3-[(1S)-1-(acetylamino)-2-ethylbutyl]-4-amino-2-hydroxy-, methyl ester, (1S,2S,3R,4R)-, mono(trifluoroacetate) (salt) (9CI) 357448-34-1 C17H29F3N2O6
Dobutamine Impurity 16 Dobutamine Impurity 16
Faropenem Impurity AB Faropenem Impurity AB
Nirmatrelvir Impurity 9 Nirmatrelvir Impurity 9
4-nitro-1H-Imidazole-2-carboxaldehyde 4-nitro-1H-Imidazole-2-carboxaldehyde 33543-81-6 C4H3N3O3
1-CHLOROMETHYL-2,3,4-TRIMETHOXYBENZENE 1-CHLOROMETHYL-2,3,4-TRIMETHOXYBENZENE 1133-49-9 C10H13ClO3
Bumetanide Impurity 19 Bumetanide Impurity 19
Rocuronium Bromide Impurity 26 、27 Rocuronium Bromide Impurity 26 、27
Roxadustat Impurity 20 Roxadustat Impurity 20
Ruxolitinib Impurity Ruxolitinib Impurity
Sitagliptin Impurity 82 Sitagliptin Impurity 82
(1S,7S,8S,8aR)-8-(2-((2R,4R)-4-hydroxy-6-oxotetrahydro-2H-pyran- 2-yl)ethyl)-3,7-dimethyl-1,2,4a,5,6,7,8,8a-octahydronaphthalen-1-yl 2,2-dimethylbutanoate (1S,7S,8S,8aR)-8-(2-((2R,4R)-4-hydroxy-6-oxotetrahydro-2H-pyran- 2-yl)ethyl)-3,7-dimethyl-1,2,4a,5,6,7,8,8a-octahydronaphthalen-1-yl 2,2-dimethylbutanoate
Perospirone Impurity 21 Perospirone Impurity 21
Perospirone Impurity 11 Perospirone Impurity 11
Dolutegravir Impurity 21 Dolutegravir Impurity 21
NA NA
Fondaparinux sodium impurity 7 Fondaparinux sodium impurity 7
Fondaparinux sodium impurity 3 Fondaparinux sodium impurity 3
Oxacillin sodium Impurity B Oxacillin sodium Impurity B
Revefenacin Impurity 21 Revefenacin Impurity 21
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