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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Pemetrexed disodium Impurity Pemetrexed disodium Impurity 17405-00-4 C7H5ClN2O2
Vonoprazan Impurity Z-1 Vonoprazan Impurity Z-1
Olanzapine impurity M Olanzapine impurity M C17H20N4S
Afatinib impurity 41 Afatinib impurity 41 69169-63-7 C5H9NO2
Vildagliptin Impurity 38 Vildagliptin Impurity 38 956508-24-0 C10H16N2O3
Tazobactam Impurity C Tazobactam Impurity C
Palonosetron Impurity TM1-YA Palonosetron Impurity TM1-YA
Pitavastatin Impurity 33 Pitavastatin Impurity 33
Pralatrexate Impurity 14 Pralatrexate Impurity 14
Pitavastatin Impurity 51 Pitavastatin Impurity 51
Pitavastatin Impurity 59 Pitavastatin Impurity 59
Lenvatinib Impurity 42 Lenvatinib Impurity 42
Tazobactam Impurity 8 Tazobactam Impurity 8
Prednicarbate Impurity B Prednicarbate Impurity B
Doxofylline Impurity 13 Doxofylline Impurity 13
Afatinib impurity 46 Afatinib impurity 46
Afatinib impurity 46 Afatinib impurity 46
Canagliflozin Impurity 60 Canagliflozin Impurity 60
Canagliflozin Impurity 65 Canagliflozin Impurity 65
Rosuvastatin Impurity 75 Rosuvastatin Impurity 75
Acyclovir Impurity 11 Acyclovir Impurity 11
Selexipag Impurity 6 Selexipag Impurity 6
Cabozantinib impurity N Cabozantinib impurity N
Barcitinib impurity-09 Barcitinib impurity-09 1187594-16-6 C14H13N7
Rotigotine Impurity 6 Rotigotine Impurity 6
Olprinone Impurity 7 Olprinone Impurity 7 2236020-10-1 C9H10N2
Cilastatin Impurity 2 Cilastatin Impurity 2
Cilastatin Impurity 7 Cilastatin Impurity 7
Dabrafenib Impurity 1 Dabrafenib Impurity 1 1907654-22-1 C24H21F3N4O3S2
Trelagliptin Impurity SJ Trelagliptin Impurity SJ 2087874-94-8 C40H42F2N10O6
Eliglustat Impurity 2（Eliglustat SR-Isomer） Eliglustat Impurity 2（Eliglustat SR-Isomer） 1092472-66-6 C23H36N2O4
Tamsulosin impurity C Tamsulosin impurity C C20H28N2O5S
Umeclidinium Bromide Impurity 9 DiHCl Umeclidinium Bromide Impurity 9 DiHCl 494778-36-8 C18H32N2O4
Flucloxacillin Impurity 4 Flucloxacillin Impurity 4
Ipratropium bromide Impurity 4 Ipratropium bromide Impurity 4 C20H29Br2NO3
Cefminox Impurity 6 Cefminox Impurity 6
Afatinib Impurity 55 Afatinib Impurity 55
Apremilast Impurity 30 Apremilast Impurity 30 1609546-91-9
Aprepitant Impurity 33 Aprepitant Impurity 33 502537-39-5 C20H20F7NO3
Brivaracetam Impurity 9 Brivaracetam Impurity 9
Esomeprazole Impurity 43 Esomeprazole Impurity 43 2826359-93-5
Etoricoxib Impurity 40 Etoricoxib Impurity 40
Lenvatinib Impurity 31 Lenvatinib Impurity 31
Oseltamivir Impurity 35 Oseltamivir Impurity 35 757965-01-8 C14H22O4
Palbociclib Impurity 39 Palbociclib Impurity 39
Posaconazole Impurity 75 Posaconazole Impurity 75
Rabeprazole Impurity 22 Rabeprazole Impurity 22
Sunitinib Impurity 12 Sunitinib Impurity 12
Ticagrelor Impurity 113 Ticagrelor Impurity 113
Ticagrelor Impurity 97 Ticagrelor Impurity 97
Tofacitinib Impurity 117 Tofacitinib Impurity 117
Trelagliptin Impurity 22 Trelagliptin Impurity 22
Trelagliptin Impurity 29 Trelagliptin Impurity 29
Vildagliptin Impurity 43 Vildagliptin Impurity 43
tert-butyl 4-(6-((6-acetyl-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carboxylate tert-butyl 4-(6-((6-acetyl-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carboxylate 1651214-74-2 C29H37N7O4
Prasugrel Impurity 4 HCl Prasugrel Impurity 4 HCl 1618107-96-2 C20H22Cl2FNO3S
Tofacitinib Impurity K Tofacitinib Impurity K
N-(3-chloro-4-fluorophenyl)-7 -methoxy-6-(3-morpholinopropoxy)-N-(3-morpholinopropyl)quinazolin-4-amine N-(3-chloro-4-fluorophenyl)-7 -methoxy-6-(3-morpholinopropoxy)-N-(3-morpholinopropyl)quinazolin-4-amine 1502829-45-9 C29H37ClFN5O4
5-(hydroxymethyl)-1,2-dihydro-1,2,4-triazol-3-one 5-(hydroxymethyl)-1,2-dihydro-1,2,4-triazol-3-one 24021-90-7 C3H5N3O2
( 2-{4-[N-(5,6-diphenylpyrazin-2-yl)-N-isopropylamino]butyloxy}acetic acid tert-butylester ) ( 2-{4-[N-(5,6-diphenylpyrazin-2-yl)-N-isopropylamino]butyloxy}acetic acid tert-butylester ) 475084-96-9 C29H37N3O3
N-(4-Hydroxymethylbenzyl) Cyclam N-(4-Hydroxymethylbenzyl) Cyclam 176252-20-3 C18H32N4O
Alvimopan Impurity 3 Alvimopan Impurity 3
Nicergoline Impurity G Nicergoline Impurity G
Isavuconazole Impurity 1 Isavuconazole Impurity 1 2069200-13-9 C13H12F2N4O
Sofosbuvir Impurity23 Sofosbuvir Impurity23
Tacrolimus Impurity 1 Tacrolimus Impurity 1
Bisoprolol EP Impurity F Bisoprolol EP Impurity F 1798418-82-2 C18H31NO4
Pantoprazole EP Impurity F Pantoprazole EP Impurity F 721924-06-7 C17H17F2N3O4S
Dexchlorpheniramine impurity F Dexchlorpheniramine impurity F
Irbesartan IMpurity F Irbesartan IMpurity F C25H28N6O
Itraconazole iMpurity 2 Itraconazole iMpurity 2
Palbociclib Impurity 6 Palbociclib Impurity 6 1874141-57-7 C33H45N7O4
Azacitidine Impurity 1 Azacitidine Impurity 1
Saxagliptin Impurity 5 Saxagliptin Impurity 5
Cinacalcet Impurity 18 Cinacalcet Impurity 18
Erlotinib Impurity 23 Erlotinib Impurity 23 2021249-11-4 C23H18F6N6O
Erlotinib Impurity 36 Erlotinib Impurity 36
Fasudil Impurity 17 Fasudil Impurity 17
Febuxostat Impurity 50 Febuxostat Impurity 50
Varenicline Impurity 8 Varenicline Impurity 8
Ticagrelor Impurity 53 Ticagrelor Impurity 53 2750247-77-7 C17H27ClN4O4S
Edoxaban Impurity 5 Edoxaban Impurity 5
Edoxaban Impurity 11 Edoxaban Impurity 11
Empagliflozin Impurity 5 Empagliflozin Impurity 5 1800196-46-6 C17H16ClIO3
Carfilzomib Impurity 2 Carfilzomib Impurity 2
Oseltamivir Impurity 20 Oseltamivir Impurity 20 212504-90-0 C12H22N2O3
Febuxostat Impurity 61 Febuxostat Impurity 61
Atosiban Impurity G Atosiban Impurity G
1-cyclopropyl-6,8-dimethoxy-7-((4aS,7aS)-octahydro-6H-pyrrolo [3,4-b]pyridin-6-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylic 1-cyclopropyl-6,8-dimethoxy-7-((4aS,7aS)-octahydro-6H-pyrrolo [3,4-b]pyridin-6-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylic 2252446-68-5 C22H28ClN3O5
CINACALCET-001-R CINACALCET-001-R 1630761-22-6 C11H11BF4N4O
Cefotiam Impurity D Cefotiam Impurity D
Atorvastatin Calcium Hydrate impurity 39 Atorvastatin Calcium Hydrate impurity 39 2243639-97-4 C33H35FN2O5
Peramivir Impurity B Peramivir Impurity B
AztreonaM IMpurity C AztreonaM IMpurity C
Pramipexole Related Impurity 3 Pramipexole Related Impurity 3 2166216-34-6 C10H17N3OS
Lincomycin sulfoxide Impurity 5 Lincomycin sulfoxide Impurity 5
Sulpiride Impurity 4 Sulpiride Impurity 4
Tacrolimus Impurity E Tacrolimus Impurity E
Bumetanide iMpurity E Bumetanide iMpurity E
CLOTRIMAZOLE IMP. A (PHARMEUROPA): (2-CHLOROPHENYL)DIPHENYLMETHANOL CLOTRIMAZOLE IMP. A (PHARMEUROPA): (2-CHLOROPHENYL)DIPHENYLMETHANOL 66774-02-5 C19H15ClO
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