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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
(16α)-16,17-[Butylidenebis(oxy)]-21-hydroxypregna-1,4-diene-3,11,20-trione (16α)-16,17-[Butylidenebis(oxy)]-21-hydroxypregna-1,4-diene-3,11,20-trione 216453-74-6 C25H32O6
6(S)-Hydroperoxy Simvastatin 6(S)-Hydroperoxy Simvastatin 149949-01-9 C25H38O7
Russupteridine IV Russupteridine IV 2535-20-8 C13H18N4O6
2-[(1-Benzylpiperidin-4-yl)hydroxyMethyl]-5,6-diMethoxyindan-1-one 2-[(1-Benzylpiperidin-4-yl)hydroxyMethyl]-5,6-diMethoxyindan-1-one 197010-20-1 C24H29NO4
5,6-trans-Ergocalciferol 5,6-trans-Ergocalciferol 51744-66-2 C28H44O
2-isonicotinoyl-5,6-diMethoxy-2,3-dihydro-1H-inden-1-one 2-isonicotinoyl-5,6-diMethoxy-2,3-dihydro-1H-inden-1-one 923571-15-7 C17H15NO4
4-(2-nitrophenyl)Morpholin-3-one 4-(2-nitrophenyl)Morpholin-3-one 845729-41-1 C10H10N2O4
Irbesartan IMpurity E Irbesartan IMpurity E C25H28N6O
LeflunoMide EP IMpurity G LeflunoMide EP IMpurity G 724429-16-7 C12H12N2O2
Telmisartan impurity C Telmisartan impurity C
Itraconazole iMpurity E Itraconazole iMpurity E
Edoxaban Isomer (RRR) Edoxaban Isomer (RRR) 1255529-24-8 C24H30ClN7O4S
1-NaphthaleneacetaMide, 1,2,3,4-tetrahydro-7-Methoxy- 1-NaphthaleneacetaMide, 1,2,3,4-tetrahydro-7-Methoxy- 92041-01-5 C13H17NO2
1,4,7,10-Tetraazacyclododecane-1,7-diacetic acid 1,4,7,10-Tetraazacyclododecane-1,7-diacetic acid 112193-75-6 C12H24N4O4
7-ethyl-5H-chroMeno[2,3-b]pyridin-5-one 7-ethyl-5H-chroMeno[2,3-b]pyridin-5-one 53944-31-3 C14H11NO2
2-Methyl-10H-thieno[2,3-b][1,5]benzodiazepin-4-aMine 2-Methyl-10H-thieno[2,3-b][1,5]benzodiazepin-4-aMine 612503-08-9 C12H11N3S
IMp. A (EP): 8-Chloro-5,10-dihydro-11H-dibenzo[b,e][1,4]diazepin-11-one IMp. A (EP): 8-Chloro-5,10-dihydro-11H-dibenzo[b,e][1,4]diazepin-11-one
IMp. C (EP): 8-Chloro-11-(piperazin-1-yl)-5H- dibenzo[b,e][1,4]diazepine IMp. C (EP): 8-Chloro-11-(piperazin-1-yl)-5H- dibenzo[b,e][1,4]diazepine
21-Dehydro-16α-hydroxy Prednisolone 21-Dehydro-16α-hydroxy Prednisolone 1188271-73-9 C21H26O6
(6α,11β)-11,20-Dihydroxy-6-Methyl-3-oxopregna-1,4,17(20)-trien-21-al (6α,11β)-11,20-Dihydroxy-6-Methyl-3-oxopregna-1,4,17(20)-trien-21-al 1338549-02-2 C22H28O4
(1R)-2-chloro-1-(3,4-difluorophenyl)-1-ethanol (1R)-2-chloro-1-(3,4-difluorophenyl)-1-ethanol 1212376-05-0 C8H7ClF2O
2-[[(3aR,4S,6R,6aS)-6-[7-Chloro-5-(propylthio)-3H-1,2,3-triazolo[4,5-d]pyrimidin-3-yl]tetrahydro-2,2-dimethyl-4H-cyclopenta-1,3-dioxol-4-yl]oxy]-ethanol 2-[[(3aR,4S,6R,6aS)-6-[7-Chloro-5-(propylthio)-3H-1,2,3-triazolo[4,5-d]pyrimidin-3-yl]tetrahydro-2,2-dimethyl-4H-cyclopenta-1,3-dioxol-4-yl]oxy]-ethanol 376608-75-2 C17H24ClN5O4S
Fluconazole IMpurity F Fluconazole IMpurity F C13H12F2N6O
Erlotinib IMpurity A Erlotinib IMpurity A 1058132-82-3 C22H25N3O4
Apixaban iMpurity 5 Apixaban iMpurity 5
cefaclor iMpurity C cefaclor iMpurity C 143059-69-2 C15H14ClN3O4S
ceftazidiMe iMpurity B ceftazidiMe iMpurity B 1236700-64-3
pidotiMod iMpurity D pidotiMod iMpurity D 162148-15-4 C9H12N2O4S
Irinotecan Hydroxyl Acid Irinotecan Hydroxyl Acid 142677-15-4 C22H22N2O6
CyclopropanaMine, 2-(4-fluorophenyl)-(hydrochloride)(1:1),(1R,2S)- CyclopropanaMine, 2-(4-fluorophenyl)-(hydrochloride)(1:1),(1R,2S)- 1314324-00-9 C9H11ClFN
(1S,2S,3R,5S)-3-(7-(((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)aMino)-5-(propylsulfinyl)-3H-[1,2,3]triazolo[4,5-d]pyriMidin-3-yl)-5-(2-hydroxyethoxy)cyclopentane-1,2-diol (1S,2S,3R,5S)-3-(7-(((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)aMino)-5-(propylsulfinyl)-3H-[1,2,3]triazolo[4,5-d]pyriMidin-3-yl)-5-(2-hydroxyethoxy)cyclopentane-1,2-diol 1644461-85-7 C23H28F2N6O5S
AtracuriuM IMpurity C (Mixture of DiastereoMers) AtracuriuM IMpurity C (Mixture of DiastereoMers) 86293-35-8
AtracuriuM IMpurity E (cis-Quaternary Acid) AtracuriuM IMpurity E (cis-Quaternary Acid)
AztreonaM IMpurity B AztreonaM IMpurity B
Ceftriaxone IMpurit E Ceftriaxone IMpurit E
Cetirizine IMpurity-6 Cetirizine IMpurity-6 C21H25ClN2O3
Cinacalcet IMpurity 10 Cinacalcet IMpurity 10 1809324-40-0 C29H28F3NO2S
Dasatinib IMpurity 5 Dasatinib IMpurity 5
Diacerein IMpurity F Diacerein IMpurity F 13928-72-8 C35H36O16
D-Valganciclovir Hydrochloride D-Valganciclovir Hydrochloride 1393911-57-3 C14H23ClN6O5
Entecavir IMpurity E Entecavir IMpurity E
EzetiMibe IMpurity 1 EzetiMibe IMpurity 1 190595-66-5 C24H22FNO3
Flurbiprofen IMpurity B Flurbiprofen IMpurity B 1797883-74-9 C18H17FO4
IMatinib DiPiperidine IMpurity IMatinib DiPiperidine IMpurity
levocetirizine IMpurity levocetirizine IMpurity
OseltaMivir IMpurity F OseltaMivir IMpurity F
RocuroniuM BroMide IMpurity 19 RocuroniuM BroMide IMpurity 19
S-(+)-O-DesMethyl-Venlafaxine-d6 S-(+)-O-DesMethyl-Venlafaxine-d6 1062609-99-7 C16H25NO2
SalMeterol IMpurity F SalMeterol IMpurity F C25H37NO4
Sitagliptin Defuoro IMpurity 4 Sitagliptin Defuoro IMpurity 4 486459-98-7 C15H19F2NO4
Sulpiride IMpurity F Sulpiride IMpurity F
trans-Ibuprofen IMpurity G trans-Ibuprofen IMpurity G 1391054-15-1 C26H32O4
EthanediaMide iMpurity F EthanediaMide iMpurity F 480452-37-7 C16H22ClN5O3
Paroxetine IMpurity Paroxetine IMpurity
Sitagliptin EP Impurity 4 Sitagliptin EP Impurity 4
Acetamide, N-(4-hydroxyphenyl)-N-nitroso- Acetamide, N-(4-hydroxyphenyl)-N-nitroso- 146897-60-1 C8H8N2O3
3-Azetidineacetonitrile, 1-(ethylsulfonyl)-3-[4-(1H-pyrazol-4-yl)-7H-pyrrolo[2,3-d]pyrimidin-7-yl]- 3-Azetidineacetonitrile, 1-(ethylsulfonyl)-3-[4-(1H-pyrazol-4-yl)-7H-pyrrolo[2,3-d]pyrimidin-7-yl]- 2402776-83-2 C16H17N7O2S
Iohexol ImpuritiesE Iohexol ImpuritiesE
TERT-BUTYL (R)-6-CHLORO-5-HYDROXY-3-OXOHEXANOATE TERT-BUTYL (R)-6-CHLORO-5-HYDROXY-3-OXOHEXANOATE 404958-08-3 C10H17ClO4
2-(3-(4-(4-(1-(3-(cyanomethyl)-1-(ethylsulfonyl)azetidin-3-yl)-1H-pyrazol-4-yl)-7H-pyrrolo[2,3-d]pyrimidin-2-yl)-1H-pyrazol-1-yl)-1-(ethylsulfonyl)azetidin-3-yl)acetonitrile 2-(3-(4-(4-(1-(3-(cyanomethyl)-1-(ethylsulfonyl)azetidin-3-yl)-1H-pyrazol-4-yl)-7H-pyrrolo[2,3-d]pyrimidin-2-yl)-1H-pyrazol-1-yl)-1-(ethylsulfonyl)azetidin-3-yl)acetonitrile
8-chloro-11-(1-((5-methylpyridin-3-yl)methyl)piperidin-4-yl)-11H-benzo[5,6]cyclohepta[1,2-b]pyridine 8-chloro-11-(1-((5-methylpyridin-3-yl)methyl)piperidin-4-yl)-11H-benzo[5,6]cyclohepta[1,2-b]pyridine
Bumetanide Photodegradable Impurity 16 Bumetanide Photodegradable Impurity 16
Bisoprolol Impurity 47 Bisoprolol Impurity 47
Gadobutrol Impurity 11(Ammonium salt) Gadobutrol Impurity 11(Ammonium salt)
Flomoxef Impurity F Flomoxef Impurity F
Tegoprazan Impurity 15 Tegoprazan Impurity 15
Nirmatrelvir Impurity 8 Nirmatrelvir Impurity 8
Nirmatrelvir Impurity 2 Nirmatrelvir Impurity 2
(5-(2-fluorophenyl)-1H-pyrrol-3-yl)methanamine hydrochloride (5-(2-fluorophenyl)-1H-pyrrol-3-yl)methanamine hydrochloride
Rocuronium Bromide Impurity 24 、25 Rocuronium Bromide Impurity 24 、25
Roxadustat Impurity 17 Roxadustat Impurity 17
Perospirone Impurity 20 Perospirone Impurity 20 1002359-81-0
Dolutegravir Impurity 19 Dolutegravir Impurity 19
Cephalexin Impurity I Cephalexin Impurity I
Fondaparinux sodium impurity 6 Fondaparinux sodium impurity 6
Fondaparinux sodium impurity 2 Fondaparinux sodium impurity 2
Oxacillin sodium Impurity I Oxacillin sodium Impurity I
Mixture of Cefoxitin Impurity E&F Mixture of Cefoxitin Impurity E&F
Revefenacin Impurity 22 Revefenacin Impurity 22
Lasmiditan Impurity 7 Lasmiditan Impurity 7
Febuxostat impurity BAC Febuxostat impurity BAC
4-(3,4-DICHLOROPHENYL)-1,2,3,4-TETRAHYDRO-1-NAPHTHALENOL 4-(3,4-DICHLOROPHENYL)-1,2,3,4-TETRAHYDRO-1-NAPHTHALENOL 866018-46-4 C16H14Cl2O
Lasmiditan Impurity 9 Lasmiditan Impurity 9
Letermovir Impurity 2 Letermovir Impurity 2
1H-Imidazole-2-carboxylic acid 1H-Imidazole-2-carboxylic acid 16042-25-4 C4H4N2O2
Olodaterol Impurity 19 Olodaterol Impurity 19
Ethacridine Impurity 12 Ethacridine Impurity 12
2-[4-[(2RS)-2-HYDROXY-3[(1-METHYLETHYL)AMINO]PROPOXY]PHENYL]ACETONITRILE 2-[4-[(2RS)-2-HYDROXY-3[(1-METHYLETHYL)AMINO]PROPOXY]PHENYL]ACETONITRILE 29277-73-4 C14H20N2O2
(-)-Nebivolol (-)-Nebivolol 118457-16-2 C22H25F2NO4
2-Hydroxymethyl Olanzapine 2-Hydroxymethyl Olanzapine 174756-45-7 C17H20N4OS
5-Hydroxymethyl Flucloxacillin 5-Hydroxymethyl Flucloxacillin 75524-31-1 C19H17ClFN3O6S
6-Hydroxy-5-methoxy-1-indanone 6-Hydroxy-5-methoxy-1-indanone 90843-62-2 C10H10O3
9-cis Acitretin 9-cis Acitretin 419534-31-9 C21H26O3
N-Desmethylvinblastine N-Desmethylvinblastine 18172-50-4 C45H56N4O9
Rabeprazole Sulfone Rabeprazole Sulfone 117976-47-3 C18H21N3O4S
6-BROMO-3 H-ISOBENZOFURAN-1-ONE 6-BROMO-3 H-ISOBENZOFURAN-1-ONE 19477-73-7 C8H5BrO2
TOPOTECANACETATE TOPOTECANACETATE 123948-88-9 C25H27N3O7
dimethyl 2,6-dimethyl-4-(4-nitrophenyl)-1,4-dihydropyridine-3,5-dicarb oxylate dimethyl 2,6-dimethyl-4-(4-nitrophenyl)-1,4-dihydropyridine-3,5-dicarb oxylate 21829-09-4 C17H18N2O6
7-[(2-aMinoethyl)aMino] -1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid 7-[(2-aMinoethyl)aMino] -1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid C14H16FN3O3
(S)-(1R,3s,5S)-8-Methyl-8-azabicyclo[3.2.1]oct-6-en-3-yl 3-hydroxy-2-phenylpropanoate (S)-(1R,3s,5S)-8-Methyl-8-azabicyclo[3.2.1]oct-6-en-3-yl 3-hydroxy-2-phenylpropanoate 61616-97-5 C17H21NO3
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