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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Apremilast Impurity 19 Apremilast Impurity 19 2201974-01-6 C22H24N2O7S
Nimodipine Metabolite 3 Nimodipine Metabolite 3 82219-48-5 C20H22N2O7
N-DEMETHYLROXITHROMYCIN N-DEMETHYLROXITHROMYCIN 118267-18-8 C40H74N2O15
(E)-4-BROMO-N,N-DIMETHYLBUT-2-ENAMIDE (E)-4-BROMO-N,N-DIMETHYLBUT-2-ENAMIDE 137131-09-0 C6H10BrNO
Almotriptan Impurity 1 Almotriptan Impurity 1 334981-13-4 C17H25N3O3S
Amlodipine Impurity 33 Amlodipine Impurity 33 C26H31ClN2O8S
Erlotinib Impurity 36 HCl Erlotinib Impurity 36 HCl
Rasagiline Impurity 6 HCl Rasagiline Impurity 6 HCl 138911-07-6 C9H11NO
Taladafil impurity Taladafil impurity 1356345-67-9 C23H23N3O4
Mirabegron 2-Oxo Impurity Mirabegron 2-Oxo Impurity 1684453-05-1 C21H22N4O3S
Riluzole 4-Bromo Impurity Riluzole 4-Bromo Impurity 144631-82-3 C8H4BrF3N2OS
Furosemide Impurity 8 Furosemide Impurity 8 41332-59-6 C7H4Cl2O5S
Irinotecan Impurity 29 Irinotecan Impurity 29 797762-11-9 C22H24N2O4
Empagliflozin Impurity 41 Empagliflozin Impurity 41
Empagliflozin Impurity 47 Empagliflozin Impurity 47
Irbesartan Irbesartan 141745-36-0 C23H26N6O
Aprepitant Aprepitant 170902-80-4 C20H18F7NO2
Pranoprofen Impurity 5 Pranoprofen Impurity 5 145986-74-9 C16H15NO3
Fluconazole Impurity Fluconazole Impurity 1609495-95-5 C15H14FN9O
1,4-bis(4-((1,4,8,11-tetraazacyclotetradecan-1-yl)methyl)benzyl)- 1,4,8,11-tetraazacyclotetradecane dodecahydrochloride 1,4-bis(4-((1,4,8,11-tetraazacyclotetradecan-1-yl)methyl)benzyl)- 1,4,8,11-tetraazacyclotetradecane dodecahydrochloride C46H96Cl12N12
Entacapone Impurity 6 Entacapone Impurity 6
Apremilast Impurity 15 Apremilast Impurity 15 2096492-41-8 C22H26N2O8S
Erythromycin EP Impurity L Erythromycin EP Impurity L 127955-44-6 C37H65NO14
Levetiracetam impurity 1 Levetiracetam impurity 1 1342566-28-2 C8H16N2O3
2-(3-(Trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)acetohydrazide hydrochloride 2-(3-(Trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)acetohydrazide hydrochloride 1485732-85-1 C8H11F3N6O
(R)-N-(1-(3-(2-cyano-5-fluorobenzyl)-1-methyl-2,6-dioxo- 1,2,3,6-tetrahydropyrimidin-4-yl)piperidin-3-yl)formamide (R)-N-(1-(3-(2-cyano-5-fluorobenzyl)-1-methyl-2,6-dioxo- 1,2,3,6-tetrahydropyrimidin-4-yl)piperidin-3-yl)formamide 2087874-91-5 C19H20FN5O3
Abiraterone Impurity 12 Abiraterone Impurity 12
Atracurium Impurity O Atracurium Impurity O
Emtricitabine Impurity F Emtricitabine Impurity F
Pitavastatin Impurity 44 Pitavastatin Impurity 44 586966-55-4 C29H32FNO4
Tirofiban Impurity F Tirofiban Impurity F
Tofacitinib Impurity 74 Tofacitinib Impurity 74
Tofacitinib Impurity 83 Tofacitinib Impurity 83
Apixaban Impurity 31 Apixaban Impurity 31 2458079-10-0 C27H30N4O6
Apixaban Impurity 38 Apixaban Impurity 38
Atracurium Impurity 4 Atracurium Impurity 4
Aztreonam Impurity 4 Aztreonam Impurity 4
Bendamustine Impurity 29 Bendamustine Impurity 29 847588-86-7 C19H22N6
Bendamustine Impurity 35 Bendamustine Impurity 35
Cefoxitin Impurity 3 Cefoxitin Impurity 3
Doripenem Impurity 5 Doripenem Impurity 5
Erlotinib Impurity 47 Erlotinib Impurity 47
Etoposide EP Impurity A Etoposide EP Impurity A 124151-67-3 C37H38O15
Lamivudine Impurity 5 Lamivudine Impurity 5
Lercanidipine Impurity 25 Lercanidipine Impurity 25 100427-22-3 C36H41N3O6
Oseltamivir Impurity 30 Oseltamivir Impurity 30
Pitavastatin Impurity 25 Pitavastatin Impurity 25 1356998-79-2 C19H16FN
Rocuronium Bromide Impurity 16 Rocuronium Bromide Impurity 16
Rocuronium Bromide Impurity 25 Rocuronium Bromide Impurity 25
Telmisartan Impurity 5 Telmisartan Impurity 5 885046-20-8 C19H19ClN4
Tinidazole Impurity 2 Tinidazole Impurity 2 140165-55-5 C6H12N2O4S
3-[3-({[(7S)-3,4-dimethoxybicyclo[4.2.0]octa-1,3,5-trien-7-yl]methyl}(methyl)amino)propyl]-7,8-dimethoxy-1,3-dihydro-2H-3-benzazepin-2-one hydrochloride 3-[3-({[(7S)-3,4-dimethoxybicyclo[4.2.0]octa-1,3,5-trien-7-yl]methyl}(methyl)amino)propyl]-7,8-dimethoxy-1,3-dihydro-2H-3-benzazepin-2-one hydrochloride 1086026-38-1 C27H34N2O5*ClH
Amoxicillin Impurity Z Amoxicillin Impurity Z C16H19N3O5S
Atracurium Impurity P Atracurium Impurity P
Atracurium Impurity U Atracurium Impurity U
Ceftazidime side chain Impurity Ceftazidime side chain Impurity
Linagliptin Impurity 35 Linagliptin Impurity 35
Ropivacaine Impurity 1 Ropivacaine Impurity 1
Ropivacaine Impurity 46 Ropivacaine Impurity 46
Sugammadex sodium Org199425-1 Impurity Sugammadex sodium Org199425-1 Impurity
Sugammadex sodium Org244517-1 Impurity Sugammadex sodium Org244517-1 Impurity
Terbutaline Impurity 11 Terbutaline Impurity 11 2387020-93-9 C8H7BrO3
(2R,3R,4R,5S,6R)-2-(4-chloro-3-(4-(((R)-tetrahydrofuran- 3-yl)oxy)benzyl)phenyl)-6-(hydroxymethyl)tetrahydro-2H- pyran-3,4,5-triol (2R,3R,4R,5S,6R)-2-(4-chloro-3-(4-(((R)-tetrahydrofuran- 3-yl)oxy)benzyl)phenyl)-6-(hydroxymethyl)tetrahydro-2H- pyran-3,4,5-triol C23H27ClO7
Afatinib impurity 34 Afatinib impurity 34 2475095-50-0 C14H7ClF2N4O2
Avibactam Impurity 39 Avibactam Impurity 39 2089462-91-7 C15H22N2O3
Butyphthalide impurity 28 Butyphthalide impurity 28
Butyphthalide impurity 36 Butyphthalide impurity 36 2245275-82-3 C15H18O5
Canagliflozin Impurity 32 Canagliflozin Impurity 32
Carbocistein Impurity B Carbocistein Impurity B
Celecoxib Impurity 22 Celecoxib Impurity 22 921617-76-7 C17H13F3N2O3S
Emtricitabine Impurity RRO Emtricitabine Impurity RRO
Febuxostat Impurity 84 Febuxostat Impurity 84
Febuxostat Impurity 89 Febuxostat Impurity 89
Gefitinib Impurity T Gefitinib Impurity T
Ibrutinib Impurity 16 Ibrutinib Impurity 16
LCZ696(valsartan + sacubitril) impurity 35 LCZ696(valsartan + sacubitril) impurity 35
Lenvatinib Impurity 15 Lenvatinib Impurity 15
Montelukast sodium impurity I Montelukast sodium impurity I
Moxifloxacin Impurity 48 Moxifloxacin Impurity 48
Olsalazine Impurity A Olsalazine Impurity A
Ozagrel impurity E Ozagrel impurity E
Solifenacin impurity 22 Solifenacin impurity 22
Sunitinib Impurity YDEJ Sunitinib Impurity YDEJ
Tofacitinib Impurity 94 Tofacitinib Impurity 94
Topiroxostat Impurity 31 Topiroxostat Impurity 31
Sitafloxacin Impurity 9 Sodium Salt Sitafloxacin Impurity 9 Sodium Salt
Azilsartan Impurity 11 Azilsartan Impurity 11 91526-16-8 C12H12O6S
Pitavastatin Impurity 18 Sodium Salt Pitavastatin Impurity 18 Sodium Salt 1611499-16-1 C25H24FNO5
Saxagliptin Impurity 10 Saxagliptin Impurity 10
(1r,4r)-4-((2-amino-4-bromobenzyl)amino)cyclohexan-1-ol hydrochloride (1r,4r)-4-((2-amino-4-bromobenzyl)amino)cyclohexan-1-ol hydrochloride C13H20BrClN2O
Aztreonam Impurity 6 Aztreonam Impurity 6
Cetirizine impurity 14 Cetirizine impurity 14 C21H25ClN2O3
Vitamin B1 Impurity 1 Vitamin B1 Impurity 1 C12H17ClN4OS
Diquafosol Impurity UP2U Diquafosol Impurity UP2U 221169-12-6 C18H25N4NaO17P2
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
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