Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Cabozantinib impurity C Cabozantinib impurity C
Loratadine Impurity 4 Loratadine Impurity 4 C22H23ClN2O2
Metoprolol IMpurity 4 Metoprolol IMpurity 4 C15H25NO3
Mirabegron Impurity 10 Mirabegron Impurity 10
8-cyclopentyl-6-(1-hydroxyethyl)-5-methyl-2-((5-(piperazin-1-yl)pyridin-2-yl)amino)pyrido[2,3-d]pyrimidin-7(8H)-one 8-cyclopentyl-6-(1-hydroxyethyl)-5-methyl-2-((5-(piperazin-1-yl)pyridin-2-yl)amino)pyrido[2,3-d]pyrimidin-7(8H)-one 1376615-91-6 C24H31N7O2
Plerixafor Impurity A Plerixafor Impurity A
Ceftazidime Impurity G Ceftazidime Impurity G 138829-73-9 C11H14N4O5S
Vonoprazan Impurity 6 Vonoprazan Impurity 6
Umeclidinium Bromide Impurity 4 Umeclidinium Bromide Impurity 4 869112-31-2 C22H28BrNO2
Deschloro Etoricoxib Deschloro Etoricoxib
Cefazolin impurity B Cefazolin impurity B 1798004-55-3 C16H21N4NaO4S3
5-chloro-N-(4-((S)-5-((5-chlorothiophene-2-carboxamido)methyl)-2-oxooxazolidin-3-yl)phenyl)-N-(2-(2-oxo-2-((((S)-2-oxo-3-(4-(3-oxomorpholino)phenyl)oxazolidin-5-yl)methyl)amino)ethoxy)ethyl)thiophene-2-carboxamide 5-chloro-N-(4-((S)-5-((5-chlorothiophene-2-carboxamido)methyl)-2-oxooxazolidin-3-yl)phenyl)-N-(2-(2-oxo-2-((((S)-2-oxo-3-(4-(3-oxomorpholino)phenyl)oxazolidin-5-yl)methyl)amino)ethoxy)ethyl)thiophene-2-carboxamide 1632463-24-1 C38H36Cl2N6O10S2
Apremilast Impurity 4 Apremilast Impurity 4 1831833-38-5 C12H16O4S
Rivaroxaban Impurity 16 Rivaroxaban Impurity 16
Topiroxostat Impurity 3 Topiroxostat Impurity 3
Diroxide Impurity 4 Diroxide Impurity 4
(R,E)-4-((3-(3-(diisopropylamino)-1-phenylpropyl)-4-hydroxybenzyl)oxy)-4-oxobut-2-enoic acid (R,E)-4-((3-(3-(diisopropylamino)-1-phenylpropyl)-4-hydroxybenzyl)oxy)-4-oxobut-2-enoic acid C26H33NO5
Flomoxef Impurity 2 Flomoxef Impurity 2 1208982-59-5 C32H30N6O7S
Lincomycin  impurity B Lincomycin impurity B
Valsartan Impurity 1 Valsartan Impurity 1 914465-68-2 C19H21N5O
Axitinib Impurity 2 Axitinib Impurity 2 1428728-83-9 C44H36N8O2S2
Ethanone, 1-[3,5-bis(phenylmethoxy)phenyl]-2-[(1,1-dimethylethyl)(phenylmethyl)amino]-, sulfate (1:1) Ethanone, 1-[3,5-bis(phenylmethoxy)phenyl]-2-[(1,1-dimethylethyl)(phenylmethyl)amino]-, sulfate (1:1) 52144-93-1 C33H37NO7S
Metronidazole Impurity 2 Metronidazole Impurity 2
ethyl 2-(3-cyano-4-isopropoxyphenyl)-4-methylthiazole-5-
carboxylate ethyl 2-(3-cyano-4-isopropoxyphenyl)-4-methylthiazole-5- carboxylate 144060-84-4 C17H18N2O3S
Dasatinib Impurity 24 Dasatinib Impurity 24
Pregabalin Impurity 19 Pregabalin Impurity 19 89015-27-0 C11H14O3
Quercetin 3-O-(6''-galloyl)-β-D-glucopyranoside Quercetin 3-O-(6''-galloyl)-β-D-glucopyranoside 56316-75-7 C28H24O16
Alogliptin Impurity 7 Alogliptin Impurity 7
diethyl 2-(2-bromoethyl)-malonate diethyl 2-(2-bromoethyl)-malonate 18721-64-7 C9H15BrO4
methyl 2,5-dihydroxybenzenesulfonate methyl 2,5-dihydroxybenzenesulfonate C7H8O5S
Pinocembroside,Pinocembrin41-O-beta-D-glucoside Pinocembroside,Pinocembrin41-O-beta-D-glucoside
4-(1-(dimethylamino)ethyl)phenyl ethyl(methyl)carbamate 2,3- dihydroxysuccinate 4-(1-(dimethylamino)ethyl)phenyl ethyl(methyl)carbamate 2,3- dihydroxysuccinate 123441-05-4 C14H22N2O2
Dapagliflozin mono acetyl impurity Dapagliflozin mono acetyl impurity 1632287-34-3 C23H27ClO7
Piperacillin Impurity 3 Piperacillin Impurity 3
Varenicline Impurity 5 Varenicline Impurity 5 950781-87-0 C11H13N3O2
4-MORPHOLIN-4-YL-1,2,5-THIADIAZOL-3-OL 4-MORPHOLIN-4-YL-1,2,5-THIADIAZOL-3-OL 30165-97-0 C6H9N3O2S
Amlodipine Impurity 29 Amlodipine Impurity 29 93848-82-9 C22H27ClN2O6
Amlodipine Impurity 34 Amlodipine Impurity 34 C26H31ClN2O8S
1-benzyl-4-(piperidin-1-yl)-1,2,3,6-tetrahydropyridine 1-benzyl-4-(piperidin-1-yl)-1,2,3,6-tetrahydropyridine 53877-76-2 C17H24N2
propan-2-yl 2-[(4R,6R)-6-{2-[2-(4-fluorophenyl)-3-phenyl-4-(phenylcarbamoyl)-5-(propan-2-yl)-1H-pyrrol-1-yl]ethyl}-2,2-dimethyl-1,3-dioxan-4-yl]acetate propan-2-yl 2-[(4R,6R)-6-{2-[2-(4-fluorophenyl)-3-phenyl-4-(phenylcarbamoyl)-5-(propan-2-yl)-1H-pyrrol-1-yl]ethyl}-2,2-dimethyl-1,3-dioxan-4-yl]acetate 1112262-71-1 C39H45FN2O5
Pregna-1,4-diene-3,20-dione, 21-(acetyloxy)-9,11-epoxy-16,17-dihydroxy-, (9β,11β,16α)- Pregna-1,4-diene-3,20-dione, 21-(acetyloxy)-9,11-epoxy-16,17-dihydroxy-, (9β,11β,16α)- 58404-37-8 C23H28O7
TYRPHOSTIN AG 1290 TYRPHOSTIN AG 1290 160391-70-8 C10H6N2O6
N-[1-(4-methoxyphenyl)-2-methylpropan-2-yl]acetamide N-[1-(4-methoxyphenyl)-2-methylpropan-2-yl]acetamide 926319-54-2 C13H19NO2
Cetirizine EP Impurity B(base) Cetirizine EP Impurity B(base) 942193-17-1 C19H21ClN2O2
Dezocine Impurity 3 Dezocine Impurity 3 100667-16-1 C16H21NO2
Ertapenem Impurity 10 Ertapenem Impurity 10 357154-27-9 C22H27N3O8S
loteprednol Impurity 8 loteprednol Impurity 8 207670-54-0 C24H29ClO7
Nimodipine Impurity 4 Nimodipine Impurity 4 74936-69-9 C18H20N2O6
Paroxetine Impurity 45 Paroxetine Impurity 45 1396174-70-1 C19H20FNO3
Tazobactam Impurity 5 Tazobactam Impurity 5 115546-67-3 C21H20ClNO3S
Tigecycline Impurity 2 Tigecycline Impurity 2 1422262-97-2 C29H39N5O8
Empagliflozin Impurity 34 Empagliflozin Impurity 34
Sugammadex Impurity 22 Sugammadex Impurity 22 2412952-94-2 C72H113NaO48S8
Febuxostat Febuxostat 1312815-36-3 C20H25NO4S
Itraconazole Impurity 34 Itraconazole Impurity 34 103661-14-9 C14H15Cl2N3O5S
Lansoprazole Impurity 34 Lansoprazole Impurity 34 1357726-93-2 C7H8N2O3
Meloxicam Impurity 1 HCl Meloxicam Impurity 1 HCl 929568-25-2 C4H7ClN2O
Palonosetron Impurity 11 Palonosetron Impurity 11 2216753-67-0 C18H24N2O
Dapagliflozin Impurity 10 Dapagliflozin Impurity 10 461432-27-9 C21H25ClO7
Levetiracetam impurity 2 Levetiracetam impurity 2 1341459-52-6 C8H17N3O2
(S)-5-chloro-N-(3-(5-chlorothiophene-2-carboxamido)-2- hydroxypropyl)-N-(4-(3-oxomorpholino)phenyl)thiophene-2- carboxamide (S)-5-chloro-N-(3-(5-chlorothiophene-2-carboxamido)-2- hydroxypropyl)-N-(4-(3-oxomorpholino)phenyl)thiophene-2- carboxamide 2204368-63-6 C23H21Cl2N3O5S2
Ezetimibe Impurity 38 Ezetimibe Impurity 38 1701462-59-0 C45H58F2N2O5Si2
Indapamide Impurity F Indapamide Impurity F 62574-66-7 C7H3Cl3O3S
Moxifloxacin Impurity 38 Moxifloxacin Impurity 38 1262758-66-6 C21H24FN3O5
Nimodipine  Impurity 3 Nimodipine Impurity 3 101072-61-1 C11H9NO5
Pitavastatin Impurity 40 Pitavastatin Impurity 40
Ritonavir EP Impurity R Ritonavir EP Impurity R
Ticagrelor Impurity 68 Ticagrelor Impurity 68 1643378-46-4 C23H29FN6O4S
Tofacitinib Impurity 70 Tofacitinib Impurity 70
Afatinib Impurity 22 Afatinib Impurity 22
Amifostine Impurity 6 Amifostine Impurity 6
Apixaban Impurity 33 Apixaban Impurity 33
Aztreonam Impurity 6 Aztreonam Impurity 6
Clarithromycin Impurity EP G Clarithromycin Impurity EP G 107216-09-1 C39H72N2O13
Dapagliflozin Impurity 32 Dapagliflozin Impurity 32
Doxofylline Impurity 7 Doxofylline Impurity 7 43135-57-5 C13H20N4O4
Erlotinib Impurity 55 Erlotinib Impurity 55
Etoposide Impurity 1 Etoposide Impurity 1
Etoposide Impurity 6 Etoposide Impurity 6
Olaparib Impurity 34 Olaparib Impurity 34
Oseltamivir Impurity 15 Oseltamivir Impurity 15 2254819-34-4 C22H36N2O4
Oseltamivir Impurity 27 Oseltamivir Impurity 27
Pitavastatin Impurity 20 Pitavastatin Impurity 20
Rocuronium Bromide Impurity 20 Rocuronium Bromide Impurity 20
Rocuronium Bromide Impurity 9 Rocuronium Bromide Impurity 9
Verapamil Impurity N Verapamil Impurity N 2086274-75-9 C33H47N3O4
Ergoline-8-carboxylic acid, 2-bromo-9,10-didehydro-6-methyl-, (8β)- Ergoline-8-carboxylic acid, 2-bromo-9,10-didehydro-6-methyl-, (8β)- 478-83-1 C16H15BrN2O2
Adefovir Impurity 6 Adefovir Impurity 6
Apremilast Impurity QY Apremilast Impurity QY
Dextrorotation lansoprazole Impurity J Dextrorotation lansoprazole Impurity J
Dextrorotation lansoprazole-N-oxide Dextrorotation lansoprazole-N-oxide
lansoprazole Impurity 23 lansoprazole Impurity 23
lansoprazole Impurity 29 lansoprazole Impurity 29
Loratadine Impurity L Loratadine Impurity L C22H23ClN2O2
meta-dyhydroxy Sugammadex sodium Impurity 1 meta-dyhydroxy Sugammadex sodium Impurity 1
Olanzapine impurity R Olanzapine impurity R C17H20N4S
Palbociclib Impurity 33 Palbociclib Impurity 33
Pramipexole Related Impurity 1 Pramipexole Related Impurity 1
Ropivacaine Impurity 37 Ropivacaine Impurity 37
Ropivacaine Impurity 42 Ropivacaine Impurity 42
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