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Pharmaceutical Impurity Reference Standards

ChemicalBookProduct Catalog Analytical Chemistry Standard Pharmaceutical Impurity Reference Standards
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Structure Chemical Name CAS MF
Cabozantinib impurity 23 Cabozantinib impurity 23 406-00-8 C6H6FNO
Celecoxib Impurity 17 Celecoxib Impurity 17 2247197-65-3 C17H14F3N3O4S
Dapoxetine impurity 21 Dapoxetine impurity 21
Febuxostat Impurity 74 Febuxostat Impurity 74
Febuxostat Impurity 79 Febuxostat Impurity 79
Febuxostat Impurity 94 Febuxostat Impurity 94
Fosaprepitant Impurity ELS Fosaprepitant Impurity ELS
Lenvatinib Impurity 14 Lenvatinib Impurity 14 417719-45-0 C19H17ClN4O4
Lenvatinib Impurity 23 Lenvatinib Impurity 23
Olsalazine Impurity F Olsalazine Impurity F
Regorafenib Impurity 19 Regorafenib Impurity 19
Regorafenib Impurity 26 Regorafenib Impurity 26
Sitafloxacin Impurity ZZ-B-01 Sitafloxacin Impurity ZZ-B-01
Tofacitinib Impurity 3 Tofacitinib Impurity 3 1206825-36-6 C13H19N5
Tofacitinib Impurity 89 Tofacitinib Impurity 89
Nintedanib Impurity L Nintedanib Impurity L 2095596-44-2 C31H33N5O4
(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10,11,13- pentahydroxy-3,5,6,8,10,12,14-heptamethyl-1-oxa-6- azacyclopentadecan-15-one (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10,11,13- pentahydroxy-3,5,6,8,10,12,14-heptamethyl-1-oxa-6- azacyclopentadecan-15-one 117693-42-2 C22H43NO7
Rizatriptan EP Impurity A Rizatriptan EP Impurity A 887001-08-3 C28H35N7
Dapoxetine iMpurity Dapoxetine iMpurity 38262-42-9 C11H10O3S
Eltrombopag Impurity 7 Eltrombopag Impurity 7
Saxagliptin Impurity 9 Saxagliptin Impurity 9
(1r,4r)-4-((2-aminobenzyl)amino)cyclohexanol (1r,4r)-4-((2-aminobenzyl)amino)cyclohexanol 15992-77-5 C15H22N2O5
Moxifloxacin degrade Impurity Moxifloxacin degrade Impurity
Edaravone Impurity 17 Edaravone Impurity 17
Capecitabine impurity 7 Capecitabine impurity 7
Linagliptin Impurity 46 Linagliptin Impurity 46
((3R,5S,E)-3,5-dihydroxy-7-(4-isopropyl-2-(N-methylmethylsulfonamido)-6-phenylpyrimidin-5-yl)hept-6-enoate)calcium(II) ((3R,5S,E)-3,5-dihydroxy-7-(4-isopropyl-2-(N-methylmethylsulfonamido)-6-phenylpyrimidin-5-yl)hept-6-enoate)calcium(II) C44H56CaN6O12S2
Levofloxacin Impurity 24 Levofloxacin Impurity 24 C18H20FN3O4
(trans)-2-(3,4-difluorophenyl)cyclopropanecarboxamide (trans)-2-(3,4-difluorophenyl)cyclopropanecarboxamide 1932275-13-2 C10H9F2NO
(3R,5S,Z)-7-(4-(4-fluorophenyl)-6-isopropyl-2-(N-methylmethylsulfonamido)pyrimidin-5-yl)-3,5-dihydroxyhept-6-enoic acid calcium(II) (3R,5S,Z)-7-(4-(4-fluorophenyl)-6-isopropyl-2-(N-methylmethylsulfonamido)pyrimidin-5-yl)-3,5-dihydroxyhept-6-enoic acid calcium(II) 1445208-17-2 C22H28FN3O6S
Tafluprost Impurity 7 Tafluprost Impurity 7 733036-94-7 C25H35FO5
Tropisetron Impurity 1 Tropisetron Impurity 1
Fosaprepitant Impurity DBJ Fosaprepitant Impurity DBJ
Cabozantinib impurity 29 Cabozantinib impurity 29
Cabozantinib impurity 34 Cabozantinib impurity 34
Carfilzomib Impurity YGH Carfilzomib Impurity YGH
Ondansetron Impurity 3 Ondansetron Impurity 3
Irsogladine Impurity GDT Irsogladine Impurity GDT
Carvedilol Impurity NH Carvedilol Impurity NH
Pregabalin Impurity 8 Pregabalin Impurity 8 44996-52-3 C7H11NO3
Pregabalin Impurity 14 Pregabalin Impurity 14 1610546-44-5 C7H11NO3
Cefditoren Impurity 1 Cefditoren Impurity 1
Cefadroxil Impurity C Cefadroxil Impurity C 79962-91-7 C16H17N3O5S
Pralatrexate Impurity 8 Pralatrexate Impurity 8 112408-16-9 C8H15NO4
Pitavastatin Impurity 46 Pitavastatin Impurity 46
Canagliflozin Impurity 46 Canagliflozin Impurity 46
Lenvatinib Impurity 37 Lenvatinib Impurity 37
Sitafloxacin Impurity 20 Sitafloxacin Impurity 20
posaconazole impurity 66 posaconazole impurity 66
Dapoxetine impurity 33 Dapoxetine impurity 33
Budesonide Impurity 4 Budesonide Impurity 4
Atracurium Impurity 31 Atracurium Impurity 31
Canagliflozin Impurity 49 Canagliflozin Impurity 49 2243132-56-9 C34H35FO11S
Canagliflozin Impurity 55 Canagliflozin Impurity 55
Rosuvastatin Impurity 74 Rosuvastatin Impurity 74
Tofacitinib Impurity 106 Tofacitinib Impurity 106
Hydroxychloroquine Impurity J Hydroxychloroquine Impurity J
Levetiracetam Impurity 25 Levetiracetam Impurity 25
Levosimendan Impurity 7 Levosimendan Impurity 7
Cabozantinib impurity K Cabozantinib impurity K
Crisaborole Impurity 8 Crisaborole Impurity 8
Trifluridine Impurity B Trifluridine Impurity B
Rotigotine Impurity Rotigotine Impurity
Olprinone Impurity 2 Olprinone Impurity 2 106730-62-5 C14H12N4O2
Nicorandil Impurity F Nicorandil Impurity F
Nicorandil Impurity A Nicorandil Impurity A
Evogliptin Impurity 1 Evogliptin Impurity 1
Ondansetron IMpurity 5 Ondansetron IMpurity 5
Plerixafor Impurity 1 Plerixafor Impurity 1
MeropeneM iMpurity 7 MeropeneM iMpurity 7
Afatinib Impurity 50 Afatinib Impurity 50
Brexpiprazole Impurity 34 Brexpiprazole Impurity 34 2247155-42-4 C25H27N3O4S
Cabozantinib Impurity 5 Cabozantinib Impurity 5 104330-60-1 C11H12FNO3
Dronedarone Impurity 9 Dronedarone Impurity 9
Empagliflozin Impurity 58 Empagliflozin Impurity 58
Exemestane Impurity 6 Exemestane Impurity 6
Gadobutrol Impurity 10 Gadobutrol Impurity 10
Linagliptin Impurity 55 Linagliptin Impurity 55
Oseltamivir Impurity 52 Oseltamivir Impurity 52
Palbociclib Impurity 65 Palbociclib Impurity 65
Pimecrolimus Impurity 1 Pimecrolimus Impurity 1
Rosuvastatin Impurity 99 Rosuvastatin Impurity 99
Terbutaline Impurity 18 Terbutaline Impurity 18
Ticagrelor Impurity 123 Ticagrelor Impurity 123
Tofacitinib Impurity 112 Tofacitinib Impurity 112 2179757-75-4 C12H19N3O2
Trelagliptin Impurity 42 Trelagliptin Impurity 42
Carbocistein Impurity E Carbocistein Impurity E
Tolvaptan Impurity 35 Tolvaptan Impurity 35 1316312-24-9 C10H10ClN
Erythromycin Impurity F Erythromycin Impurity F
Apixaban Impurity 39 Apixaban Impurity 39
Aztreonam Impurity 1 Aztreonam Impurity 1
Axitinib Impurity 1 Axitinib Impurity 1
Aprepitant Impurity 15 Aprepitant Impurity 15
Trelagliptin Impurity 17 Trelagliptin Impurity 17
Dapoxetine Impurity 1 Dapoxetine Impurity 1 2825577-69-1
Regorafenib Impurity 15 Regorafenib Impurity 15
Flomoxef Impurity 2 Flomoxef Impurity 2
Varenicline Impurity 2 Varenicline Impurity 2
Topiroxostat Impurity 5 Topiroxostat Impurity 5
Everolimus Impurity 5 Everolimus Impurity 5
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