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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
FeBuxostat Impurity 32 FeBuxostat Impurity 32 1805770-41-5 C12H12N2O
Edoxaban Impurity 9(1R,2S,4S) Edoxaban Impurity 9(1R,2S,4S) 2024614-15-9 C21H30ClN5O5
Rivaroxaban Impurity 22 Rivaroxaban Impurity 22 1350288-77-5 C19H18ClN3O5S
Rivaroxaban Impurity 27 Rivaroxaban Impurity 27 1369969-44-7 C21H21N3O5
Abiraterone Impurity 9 Abiraterone Impurity 9 165334-72-5 C24H31NO
Gliclazide Impurity A Gliclazide Impurity A
Medetomidine Impurity 14 Medetomidine Impurity 14 79924-14-4 C13H16N2
Tenofovir Disoproxil Impurity B Tenofovir Disoproxil Impurity B 36817-69-3 C8H11N5O
Ipragliflozin IMP Ipragliflozin IMP
2-Propanone, 1,3-bis(4-methoxyphenyl)- 2-Propanone, 1,3-bis(4-methoxyphenyl)- 29903-09-1 C17H18O3
1-NaphthaleneMethanaMine, α-Methyl-N-[[3-(trifluoroMethyl)phenyl]Methyl]-, (αR)- 1-NaphthaleneMethanaMine, α-Methyl-N-[[3-(trifluoroMethyl)phenyl]Methyl]-, (αR)- 1229512-52-0 C20H18F3N
Benzoic acid, 2-[[[[(5S)-2-oxo-3-[4-(3-oxo-4-Morpholinyl)phenyl]-5-oxazolidinyl]Methyl]aMino]carbonyl]- Benzoic acid, 2-[[[[(5S)-2-oxo-3-[4-(3-oxo-4-Morpholinyl)phenyl]-5-oxazolidinyl]Methyl]aMino]carbonyl]- 1365267-37-3 C22H21N3O7
NSC 609249 NSC 609249 51012-67-0 C12H20ClNO2
1-[(4-Ethoxy-3-formylphenyl)sulfonyl]-4-methylpiperazine 1-[(4-Ethoxy-3-formylphenyl)sulfonyl]-4-methylpiperazine 332374-42-2 C14H20N2O4S
ApovincaMinic Acid Ethyl Ester N-Oxide ApovincaMinic Acid Ethyl Ester N-Oxide 109741-24-4 C22H26N2O3
(2R,4S)-ethyl 5-([1,1'-biphenyl]-4-yl)-4-aMino-2-Methylpentanoate (2R,4S)-ethyl 5-([1,1'-biphenyl]-4-yl)-4-aMino-2-Methylpentanoate 752174-62-2 C20H25NO2
EMpagliflozin iMpurity 12 EMpagliflozin iMpurity 12
(2S,4R)-Teneligliptin (2S,4R)-Teneligliptin 1404559-15-4 C22H30N6OS
Daclatasvir Impurity Daclatasvir Impurity 1417333-83-5 C40H50N8O6
(3aS,12bS)-2-Methyl-2,3,3a,12b-tetrahydro-1H-dibenzo[2,3:6,7]oxepino[4,5-c]pyrrole (3aS,12bS)-2-Methyl-2,3,3a,12b-tetrahydro-1H-dibenzo[2,3:6,7]oxepino[4,5-c]pyrrole 65576-39-8 C17H17NO
1-[2-[(3,4-diMethylphenyl)thio]phenyl]- Piperazine 1-[2-[(3,4-diMethylphenyl)thio]phenyl]- Piperazine 1293489-74-3 C18H22N2S
N-acetyl-N-(2-(7-Methoxynaphthalen-1-yl)ethyl)acetaMide N-acetyl-N-(2-(7-Methoxynaphthalen-1-yl)ethyl)acetaMide 1379005-34-1 C17H19NO3
carfilzoMib iMpurity -A carfilzoMib iMpurity -A
(3S,4R)-1-(4-fluorophenyl)-3-((S)-3-(4-fluorophenyl)-3-hydroxypropyl)-4-(4-hydroxyphenyl)azetidin-2-one (3S,4R)-1-(4-fluorophenyl)-3-((S)-3-(4-fluorophenyl)-3-hydroxypropyl)-4-(4-hydroxyphenyl)azetidin-2-one 1593543-00-0 C24H21F2NO3
ethyl N-((2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)Methyl)-N-pentanoyl-L-valinate ethyl N-((2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)Methyl)-N-pentanoyl-L-valinate 1111177-30-0 C26H33N5O3
Rosuvastatin EP impurity A Rosuvastatin EP impurity A 1714147-50-8 C25H34FN3NaO7S*
Doxorubicin Impurity 6 Doxorubicin Impurity 6 69429-21-6 C26H27NO11
Etoricoxib Impurity 11 Etoricoxib Impurity 11 202409-31-2 C17H13ClN2O2S
Levofloxacin Tetrafluoro Impurity 1 Levofloxacin Tetrafluoro Impurity 1 110548-02-2 C15H15F4NO4
Penicillin F Potassium Salt Penicillin F Potassium Salt 97299-13-3 C14H21KN2O4S
Olaparib Impurity 31 Olaparib Impurity 31 458535-34-7 C12H18N2O2
Macitentan impurity A Macitentan impurity A 441798-25-0 C17H16Br2N6O4S
4-(3,4-DICHLOROPHENYL)-3,4-DIHYDRO-2H-NAPHTHALEN-1-ONE OXIME 4-(3,4-DICHLOROPHENYL)-3,4-DIHYDRO-2H-NAPHTHALEN-1-ONE OXIME 152642-35-8 C16H13Cl2NO
3-Pyridinecarboxylic acid, 6-(4-carboxy-1-piperidinyl)-5-chloro- 3-Pyridinecarboxylic acid, 6-(4-carboxy-1-piperidinyl)-5-chloro- 958457-83-5 C12H13ClN2O4
Linagliptin Impurity C Linagliptin Impurity C
Parecoxib Impurity B Parecoxib Impurity B
Vildagliptin impurity E Vildagliptin impurity E
3-propylisobenzofuran-1(3H)-one 3-propylisobenzofuran-1(3H)-one 72424-08-9 C11H12O2
Axitinib Sulfonyl Axitinib Sulfonyl 1348536-59-3 C22H18N4O3S
Atracurium Impurity B Atracurium Impurity B 87046-74-0
(R)-4-fluoro-2-((3-methyl-6-(3-((1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)amino)piperidin-1-yl)-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile (R)-4-fluoro-2-((3-methyl-6-(3-((1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)amino)piperidin-1-yl)-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile C23H24FN7O4
2-(2-fluorophenyl)-1-(1H-1,2,4-triazol-1-yl)-3-(4H-1,2,4-triazol-4-yl)propan-2-ol 2-(2-fluorophenyl)-1-(1H-1,2,4-triazol-1-yl)-3-(4H-1,2,4-triazol-4-yl)propan-2-ol C13H13FN6O
Dapagliflozin Impurity 10 Dapagliflozin Impurity 10 960404-86-8 C21H25ClO7
Ibrutinib Impurity 6 Ibrutinib Impurity 6 1917333-91-5 C28H26N6O3
Imatinib Impurity 5 Imatinib Impurity 5
Mirabegron Impurity 8 HCl Mirabegron Impurity 8 HCl 1684452-81-0 C21H24N4O2S
Regorafenib Impurity 2 Regorafenib Impurity 2
Vonoprazan Impurity 5 Vonoprazan Impurity 5
Bendamustine Bendamustine 1219709-86-0 C14H18ClN3O2
Dapagliflozin Impurity E Dapagliflozin Impurity E
Febuxostat Impurity 14 Febuxostat Impurity 14 1335202-60-2 C15H16N2OS
Kaempferol 3-robinoside 7-glucoside Kaempferol 3-robinoside 7-glucoside 114924-89-9 C33H40O20
Vitexin 7-glucoside Vitexin 7-glucoside 35109-95-6 C27H30O15
2-amino-9-((1S,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one 2-amino-9-((1S,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one 1367369-77-4 C12H15N5O3
2-chloromethyl-4-(3-hydroxypropoxy)-3-methylpyridine 2-chloromethyl-4-(3-hydroxypropoxy)-3-methylpyridine 117976-92-8 C10H14ClNO2
8-Methoxy Entecavir 8-Methoxy Entecavir 2203740-23-0 C13H17N5O4
Bortezomib Impurity 32 Bortezomib Impurity 32 1310383-72-2 C17H31BF3NO5
Topiroxostat Impurity 14 Topiroxostat Impurity 14
1-Pyrrolidinecarboxylic acid, 4-hydroxy-2-(3-thiazolidinylcarbonyl)-, 1,1-dimethylethyl ester, (2S,4S)- 1-Pyrrolidinecarboxylic acid, 4-hydroxy-2-(3-thiazolidinylcarbonyl)-, 1,1-dimethylethyl ester, (2S,4S)- 401564-34-9 C13H22N2O4S
1616710-52-1 1616710-52-1 1616710-52-1 C27H34N2O6
6-HYDROXY ONDANSETRON 6-HYDROXY ONDANSETRON 110708-17-3 C18H19N3O2
8-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-one 8-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-one 31251-41-9 C14H10ClNO
(R)-Ornidazole (R)-Ornidazole 166734-80-1 C7H10ClN3O3
Bendamustine Related Impurity 22 Bendamustine Related Impurity 22
Bendamustine Related Impurity 9 Bendamustine Related Impurity 9
Edoxaban Impurity 20 (1R,2R,4S) Edoxaban Impurity 20 (1R,2R,4S) 1928729-31-0 C16H29N3O7
Edoxaban Impurity 40 Edoxaban Impurity 40 2081883-52-3 C14H27N3O3
Everolimus Impurity 2 Everolimus Impurity 2
Levosimendan Impurity 2 (Mixture ofZandEIsomers) Levosimendan Impurity 2 (Mixture ofZandEIsomers)
N-(2,3-Dichloro-phenyl)-N'-[2-(2,3-dichloro-phenylamino)-ethyl]-ethane-1,2-diamine N-(2,3-Dichloro-phenyl)-N'-[2-(2,3-dichloro-phenylamino)-ethyl]-ethane-1,2-diamine C16H17Cl4N3
Solifenacin Related Compound 29 Solifenacin Related Compound 29 861998-77-8 C23H26N2O3
Ticagrelor Impurity 31 Ticagrelor Impurity 31
Ticagrelor Related Compound 46 Ticagrelor Related Compound 46 2205903-73-5 C28H42ClN9O8S2
Ticagrelor Related Compound 71 Ticagrelor Related Compound 71 1548397-10-9 C7H8ClN3O3S
Ticagrelor Related Compound 76 Ticagrelor Related Compound 76
Vonoprazan Impurity 25 Vonoprazan Impurity 25
1-(3,4-Dimethoxyphenyl)-2-(methylsulfonyl)ethan-1-amine 1-(3,4-Dimethoxyphenyl)-2-(methylsulfonyl)ethan-1-amine 1255909-25-1 C11H17NO4S
Adefovir Impurity C Adefovir Impurity C
Blonanserin Impurity M Blonanserin Impurity M
Brexpiprazole Impurity H Brexpiprazole Impurity H
Cefaclor EP Impurity H Cefaclor EP Impurity H
Flupentixol Impurity B Flupentixol Impurity B
Ipratropium Bromide Impurity J Ipratropium Bromide Impurity J C20H29Br2NO3
Apixaban Impurity 22 Apixaban Impurity 22 1449510-64-8 C25H26ClN5O4
Cefdinir impurity TU mixture Cefdinir impurity TU mixture
Fotagliptin Impurity 1 Fotagliptin Impurity 1
Rocuronium bromide Impurity 7 Rocuronium bromide Impurity 7
Tofacitinib Impurity 69 Tofacitinib Impurity 69
Benzenamine, 3-(2-methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)- Benzenamine, 3-(2-methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)- 641571-06-4 C11H10F3N3
Ciprofloxacin EP Impurity E Ciprofloxacin EP Impurity E 879005-96-6 C16H20FN3O
ethyl 2-(3-cyano-4-propoxyphenyl)-4-methylthiazole-5- carboxylate ethyl 2-(3-cyano-4-propoxyphenyl)-4-methylthiazole-5- carboxylate C17H18N2O3S
(2S,5R,6S)-6-bromo-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid Diphenylmethyl Ester (2S,5R,6S)-6-bromo-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid Diphenylmethyl Ester 74189-25-6 C21H20BrNO3S
Trelagliptin Impurity 5 Trelagliptin Impurity 5 2087874-92-6 C22H24FN5O5
9H-Purin-6-amine, 9-beta-D-arabinofuranosyl-2-methoxy- 9H-Purin-6-amine, 9-beta-D-arabinofuranosyl-2-methoxy- 51742-84-8 C11H15N5O5
2-(3-cyano-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid 1-oxide 2-(3-cyano-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid 1-oxide 2418591-42-9 C16H16N2O4S
Ropivacaine impurity Ropivacaine impurity 1786841-18-6 C12H14N2O3
PREDNICARBATE RELATED COMPOUND A (20 MG) (1,2-DIHYDROPREDNICARBATE) PREDNICARBATE RELATED COMPOUND A (20 MG) (1,2-DIHYDROPREDNICARBATE) 671225-26-6 C27H38O8
OPEN RING AZTREONAM OPEN RING AZTREONAM 87500-74-1 C13H19N5O9S2
Carfilzomib Impurity B Carfilzomib Impurity B
Ornidazole Impurity 1 Ornidazole Impurity 1 1100750-18-2
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