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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Pitavastatin Impurity 29 Pitavastatin Impurity 29 148516-15-8 C25H20FNO2
Rosuvastatin Related Compound 6 Rosuvastatin Related Compound 6 521973-99-9 C13H23ClO4
Medetomidine impurity Medetomidine impurity 2250243-44-6 C20H22N2O
Linagliptin Impurity 51 Linagliptin Impurity 51
Carfilzomib Impurity YGF Carfilzomib Impurity YGF
Pitavastatin Impurity 45 Pitavastatin Impurity 45 1258947-29-3 C29H32FNO4
Irinotecan Impurity L Irinotecan Impurity L
Irinotecan Impurity H Irinotecan Impurity H
LCZ696（valsartan + sacubitril） impurity 27 LCZ696（valsartan + sacubitril） impurity 27
Caspofungin Impurity EJT2 Caspofungin Impurity EJT2
Tofacitinib Impurity 100 Tofacitinib Impurity 100
Afatinib impurity 37 Afatinib impurity 37
Vildagliptin Impurity 36 Vildagliptin Impurity 36
Butyphthalide impurity 52 Butyphthalide impurity 52
Tofacitinib Impurity 102 Tofacitinib Impurity 102 1615709-90-4 C14H17ClN2
Pralatrexate Impurity 12 Pralatrexate Impurity 12 1451250-74-0 C23H23N7O5
Pralatrexate Impurity 17 Pralatrexate Impurity 17
Pitavastatin Impurity 49 Pitavastatin Impurity 49
Pitavastatin Impurity 55 Pitavastatin Impurity 55
Lenvatinib Impurity 40 Lenvatinib Impurity 40
Tazobactam Impurity 11 Tazobactam Impurity 11
Crisaborole Impurity 2 Crisaborole Impurity 2
Canagliflozin Impurity 58 Canagliflozin Impurity 58
Canagliflozin Impurity 63 Canagliflozin Impurity 63
Levetiracetam Impurity 23 Levetiracetam Impurity 23
Selexipag Impurity 4 Selexipag Impurity 4 2928611-77-0
Levosimendan Impurity 10 Levosimendan Impurity 10 134678-47-0 C11H12N2O2
Cabozantinib impurity I Cabozantinib impurity I
Rotigotine Impurity 2 Rotigotine Impurity 2
Rotigotine Impurity 9 Rotigotine Impurity 9
Olprinone Impurity 5 Olprinone Impurity 5
Vitamin B5 Impurity 1 Vitamin B5 Impurity 1 897045-90-8 C12H22N2O6
Cilastatin Impurity 5 Cilastatin Impurity 5
(R)-3-(4-(2-chloro-5-iodobenzyl)phenoxy)tetrahydrofuran (R)-3-(4-(2-chloro-5-iodobenzyl)phenoxy)tetrahydrofuran 2194590-02-6 C17H16ClIO2
Sitagliptin Impurity 69 Sitagliptin Impurity 69 2172430-88-3 C15H16F3NO4
Trimetazidine Impurity 8 Trimetazidine Impurity 8
MeropeneM iMpurity 5 MeropeneM iMpurity 5
Perindopril IMpurity 6 Perindopril IMpurity 6 2163775-15-1 C8H15NO4
Oseltamivir Impurity 48 Oseltamivir Impurity 48 651324-04-8 C18H33NO4
Tamsulosin impurity 5 Tamsulosin impurity 5 C20H28N2O5S
Flucloxacillin Impurity 5 Flucloxacillin Impurity 5
Nitrendipine iMpurity G Nitrendipine iMpurity G
(S)-N-(5-((S)-2-(2,5-difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)-3-hydroxypyrrolidine-1-carboxamide (S)-N-(5-((S)-2-(2,5-difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)-3-hydroxypyrrolidine-1-carboxamide 2409589-59-7 C21H22F2N6O2
Afatinib Impurity 53 Afatinib Impurity 53
Afatinib Impurity 68 Afatinib Impurity 68
Empagliflozin Impurity 61 Empagliflozin Impurity 61
Ipragliflozin Impurity 3 Ipragliflozin Impurity 3 1922933-61-6
Isavuconazole Impurity 30 Isavuconazole Impurity 30
Levetiracetam Impurity 27 Levetiracetam Impurity 27
Linagliptin Impurity 58 Linagliptin Impurity 58
Oseltamivir Impurity 33 Oseltamivir Impurity 33
Oseltamivir Impurity 49 Oseltamivir Impurity 49
Palbociclib Impurity 52 Palbociclib Impurity 52
Palbociclib Impurity 37 Palbociclib Impurity 37
1,1-BIS-(4-ISOBUTYLPHENYL)ETHANE 1,1-BIS-(4-ISOBUTYLPHENYL)ETHANE 102120-87-6 C22H30
N-(2,4-dimethylphenyl)piperidine-2-carboxamide N-(2,4-dimethylphenyl)piperidine-2-carboxamide 99552-32-6 C14H20N2O
2-Methyl-4-nitro-1H-imidazole-1-acetic acid 2-Methyl-4-nitro-1H-imidazole-1-acetic acid 16230-87-8 C6H7N3O4
Benzofuran-5-carboxylic acid Benzofuran-5-carboxylic acid 90721-27-0 C9H6O3
7-Chloro-1,6,7,8-tetradeoxy-6-[[[(2S)-1-methyl-4β-propyl-2α-pyrrolidinyl]carbonyl]amino]-1-(methylsulfinyl)-α-L-threo-D-galacto-octopyranose 7-Chloro-1,6,7,8-tetradeoxy-6-[[[(2S)-1-methyl-4β-propyl-2α-pyrrolidinyl]carbonyl]amino]-1-(methylsulfinyl)-α-L-threo-D-galacto-octopyranose 22431-46-5 C18H33ClN2O6S
2-(Propylthio)-4(1H)-pyrimidinone 2-(Propylthio)-4(1H)-pyrimidinone 54460-95-6 C7H10N2OS
Pazufloxacin Impurity 16 Pazufloxacin Impurity 16 165071-10-3 C14H10FNO6
Pimecrolimus Impurity 4 Pimecrolimus Impurity 4
Posaconazole Impurity 73 Posaconazole Impurity 73
Rosuvastatin Impurity 90 Rosuvastatin Impurity 90 2226413-62-1 C38H44F2N6O8S2
Tofacitinib Impurity 110 Tofacitinib Impurity 110
Tofacitinib Impurity 115 Tofacitinib Impurity 115
Trelagliptin Impurity 27 Trelagliptin Impurity 27
Vildagliptin Impurity 30 Vildagliptin Impurity 30 918830-94-1 C10H17NO2
N-methyl-N-((3R,4R)-4-methylpiperidin-3-yl)-7H-pyrrolo[2,3-d] pyrimidin-2-amine N-methyl-N-((3R,4R)-4-methylpiperidin-3-yl)-7H-pyrrolo[2,3-d] pyrimidin-2-amine C13H19N5
Tolvaptan Impurity 6 Tolvaptan Impurity 6 1432725-24-0 C18H19ClN2O2
Esmolol impurity B Esmolol impurity B
Esmolol impurity F Esmolol impurity F
Diquafosol Impurity E Diquafosol Impurity E
Bortezomib Impurity 39 Bortezomib Impurity 39
Agomelatine Impurity 1 Agomelatine Impurity 1
Sunitinib Impurity 5 Sunitinib Impurity 5
Silodosin Impurity 6 Silodosin Impurity 6
Erlotinib Impurity 19 Erlotinib Impurity 19
Ticagrelor Impurity 40 Ticagrelor Impurity 40
Moxifloxacin Impurity 12 Moxifloxacin Impurity 12
Cabozantinib Impurity 4 Cabozantinib Impurity 4
Lenvatinib Impurity 35 Lenvatinib Impurity 35
Febuxostat Impurity 58 Febuxostat Impurity 58
Cefodizime Impurity B Cefodizime Impurity B
Cefodizime Impurity D Cefodizime Impurity D
Penicillin Impurity B Penicillin Impurity B
4,4'-(1H-1,2,4-Triazol-1-ylmethylene)bis[benzoic acid] 4,4'-(1H-1,2,4-Triazol-1-ylmethylene)bis[benzoic acid] 1644566-39-1 C17H13N3O4
Cefminox Sodium impurity B Cefminox Sodium impurity B
Cefotiam Impurity B Cefotiam Impurity B
pranoprofen impurity 11 pranoprofen impurity 11 52549-44-7 C15H13NO4
Atorvastatin Calcium Hydrate impurity 32 Atorvastatin Calcium Hydrate impurity 32 2088732-01-6 C14H27NO4
Cefazolin Impurity 5 Cefazolin Impurity 5
Peramivir Impurity E Peramivir Impurity E
Lincomycin sulfoxide Impurity 3 Lincomycin sulfoxide Impurity 3
Lincomycin sulfoxide Impurity F Lincomycin sulfoxide Impurity F
Fasudil iMpurity F Fasudil iMpurity F
1-cyclopropyl-8-ethoxy-6-fluoro-7-((4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid hydrochloride 1-cyclopropyl-8-ethoxy-6-fluoro-7-((4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid hydrochloride 2252446-70-9 C22H27ClFN3O4
Doxofylline iMpurity E Doxofylline iMpurity E
Mupirocin Impurity 3 Mupirocin Impurity 3 C26H44O9
3,4-DICHLOROBENZYLAMINE HYDROCHLORIDE 3,4-DICHLOROBENZYLAMINE HYDROCHLORIDE 49552-34-3 C7H8Cl3N
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