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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
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
Sugammadex sodium Org197339-1 Impurity Sugammadex sodium Org197339-1 Impurity
Fludarabine EP impurity G Fludarabine EP impurity G 548774-56-7 C10H12ClFN5O6P
Sitagliptin Impurity 12 Sitagliptin Impurity 12 1803026-54-1 C16H12F6N4O
Afatinib impurity 30 Afatinib impurity 30
Avibactam Impurity 45 Avibactam Impurity 45 2064219-20-9 C23H46N4O6S
Butyphthalide impurity 44 Butyphthalide impurity 44 952413-01-3 C13H18O3
Cabozantinib impurity 24 Cabozantinib impurity 24
Celecoxib Impurity 18 Celecoxib Impurity 18 2271123-54-5 C11H9F3O2
Dapoxetine impurity 22 Dapoxetine impurity 22
Febuxostat Impurity 85 Febuxostat Impurity 85
Fosaprepitant Impurity NLS Fosaprepitant Impurity NLS
Irinotecan Impurity 17 HCl Irinotecan Impurity 17 HCl 1332610-75-9 C19H14N2O4
LCZ696(valsartan + sacubitril) impurity 31 LCZ696(valsartan + sacubitril) impurity 31
Lenvatinib Impurity 24 Lenvatinib Impurity 24
Lenvatinib Impurity 30 Lenvatinib Impurity 30
Regorafenib Impurity 22 Regorafenib Impurity 22
Regorafenib Impurity 28 Regorafenib Impurity 28
Sitafloxacin Impurity ZZ-C-01 Sitafloxacin Impurity ZZ-C-01
Tofacitinib Impurity 85 Tofacitinib Impurity 85 2268720-86-9 C20H24ClN5
Tofacitinib Impurity 90 Tofacitinib Impurity 90
Nintedanib Impurity M Nintedanib Impurity M
Citalopram Impurity 14 Citalopram Impurity 14 1470362-85-6 C20H23FN2O2
Eltrombopag Impurity 8 Eltrombopag Impurity 8
Vitexin 2''-O-beta-D-glucoside Vitexin 2''-O-beta-D-glucoside 61360-94-9 C27H30O15
(S)-methyl 2-(2,3-bis(hydroxymethyl)-6,7-dihydrothieno[3,2-c] pyridin-5(4H)-yl)-2-(2-chlorophenyl)acetate (S)-methyl 2-(2,3-bis(hydroxymethyl)-6,7-dihydrothieno[3,2-c] pyridin-5(4H)-yl)-2-(2-chlorophenyl)acetate 1346231-36-4 C18H20ClNO4S
Capecitabine impurity 6 Capecitabine impurity 6
Vilanterol Impurity 25 Vilanterol Impurity 25 1027529-99-2 C13H15NO4
Sugammadex sodium Org139131-1 Impurity Sugammadex sodium Org139131-1 Impurity
Dolutegravir Impurity 16 Dolutegravir Impurity 16 1357289-37-2 C20H19F2N3O5
N - hydroxy Tropisetron Impurity 2 N - hydroxy Tropisetron Impurity 2
Tofacitinib Impurity 98 Tofacitinib Impurity 98
Cabozantinib impurity 30 Cabozantinib impurity 30
Cabozantinib impurity 35 Cabozantinib impurity 35 1905820-17-8
Carvedilol Impurity DBA Carvedilol Impurity DBA 3258-70-6 C18H23NO4
Pregabalin Impurity 9 Pregabalin Impurity 9 44855-96-1 C5H7NO3
Butyphthalide impurity 50 Butyphthalide impurity 50
Canagliflozin Impurity 40 Canagliflozin Impurity 40
Pralatrexate Impurity 4 Pralatrexate Impurity 4 1445586-42-4 C18H15N5O3
Pralatrexate Impurity 9 Pralatrexate Impurity 9 1548618-61-6 C23H22N6O6
Pitavastatin Impurity 47 Pitavastatin Impurity 47
Lenvatinib Impurity 38 Lenvatinib Impurity 38
Tazobactam Impurity 9 Tazobactam Impurity 9
Doxofylline Impurity 11 Doxofylline Impurity 11 109403-76-1 C15H16N8O4
Doxofylline Impurity 14 Doxofylline Impurity 14
Canagliflozin Impurity 56 Canagliflozin Impurity 56
Canagliflozin Impurity 61 Canagliflozin Impurity 61
Tofacitinib Impurity 107 Tofacitinib Impurity 107
Hydroxychloroquine Impurity K Hydroxychloroquine Impurity K
Levosimendan Impurity 8 Levosimendan Impurity 8 274263-65-9 C14H14N6O2
Cabozantinib impurity R Cabozantinib impurity R
Rotigotine Impurity 4 Rotigotine Impurity 4
Crisaborole Impurity 4 Crisaborole Impurity 4
Crisaborole Impurity 9 Crisaborole Impurity 9
Trifluridine Impurity C Trifluridine Impurity C
Olprinone Impurity 3 Olprinone Impurity 3 1402751-73-8 C14H11N3O3
Olprinone Impurity 8 Olprinone Impurity 8
(R)-9-fluoro-3-methyl-7-oxo-10-(piperazin-1-yl)-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid hydrochloride (R)-9-fluoro-3-methyl-7-oxo-10-(piperazin-1-yl)-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid hydrochloride 117707-39-8 C17H18FN3O4
Nicorandil Impurity G Nicorandil Impurity G
Bivalirudin Impurity 3 Bivalirudin Impurity 3 1310025-28-5 C98H138N24O33
Cilastatin Impurity 3 Cilastatin Impurity 3
Solifenacin Impurity 7（Solifenacin EP Impurity D） Solifenacin Impurity 7（Solifenacin EP Impurity D） 2216750-52-4 C31H28N2O
Dyclonine Impurity 2 Dyclonine Impurity 2 66536-15-0 C13H16O2
Cefuroxime Impurity 33 Cefuroxime Impurity 33 929531-94-2 C16H16N4O9S
Ondansetron IMpurity 4 Ondansetron IMpurity 4
MeropeneM iMpurity 3 MeropeneM iMpurity 3
MeropeneM iMpurity 8 MeropeneM iMpurity 8
Metronidazole Impurity 13 Metronidazole Impurity 13 110578-73-9 C6H9N3O3
Eletriptan Impurity 4 Eletriptan Impurity 4 1422285-51-5 C44H50N4O4S2
Afatinib Impurity 51 Afatinib Impurity 51
Afatinib Impurity 51 Afatinib Impurity 51
Afatinib Impurity 66 Afatinib Impurity 66
Afatinib Impurity 66 Afatinib Impurity 66
Brivaracetam Impurity 10 Brivaracetam Impurity 10 60559-16-2 C10H20O2
Cabozantinib Impurity 6 Cabozantinib Impurity 6
Empagliflozin Impurity 59 Empagliflozin Impurity 59
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