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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Topiroxostat Impurity 7 Topiroxostat Impurity 7
Tofacitinib Impurity 12 Tofacitinib Impurity 12
Ticagrelor Impurity 16 Ticagrelor Impurity 16
Ticagrelor Impurity 22 Ticagrelor Impurity 22
Milrinone Impurity 5 Milrinone Impurity 5
Caspofungin Impurity 4 Caspofungin Impurity 4 258510-40-6 C49H78N8O17
Canagliflozin Impurity 27 Canagliflozin Impurity 27
Loxoprofen Impurity 1 Loxoprofen Impurity 1
Febuxostat Impurity 54 Febuxostat Impurity 54
Silodosin Impurity B Silodosin Impurity B
Cefminox Sodium impurity F Cefminox Sodium impurity F
Clindamycin Impurity F Clindamycin Impurity F
Fasudil iMpurity D Fasudil iMpurity D
2-((4R,6R)-6-(2-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)ethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetic acid 2-((4R,6R)-6-(2-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)ethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetic acid 929540-41-0 C36H41CaFN2O5
Doxofylline iMpurity C Doxofylline iMpurity C
Puerarin-4'-O-β-D-glucopyranoside Puerarin-4'-O-β-D-glucopyranoside 117047-08-2 C27H30O14
N-Propyl-7,8-dimethoxy-1,3,4,5-tetrahydro-2H-3-benzazepin-2-one N-Propyl-7,8-dimethoxy-1,3,4,5-tetrahydro-2H-3-benzazepin-2-one 2512208-76-1 C15H21NO3
4-Desmethyl 3-Methyl Vortioxetine Hydrochloride 4-Desmethyl 3-Methyl Vortioxetine Hydrochloride 1293343-01-7
4'-(Difluoromethoxy)acetanilide 4'-(Difluoromethoxy)acetanilide 22236-11-9 C9H9F2NO2
EthanediaMide, N1-(5-chloro-2-pyridinyl)-N2-[(1S,2S,4R)-4-[(diMethylaMino)carbonyl]-2-[[(4,5,6,7-tetrahydro-5-Methylthiazolo[5,4-c]pyridin-2-yl)carbonyl]aMino]cyclohexyl]- EthanediaMide, N1-(5-chloro-2-pyridinyl)-N2-[(1S,2S,4R)-4-[(diMethylaMino)carbonyl]-2-[[(4,5,6,7-tetrahydro-5-Methylthiazolo[5,4-c]pyridin-2-yl)carbonyl]aMino]cyclohexyl]- 1255529-28-2 C24H30ClN7O4S
N-carbaMoyl-2-Methyl benzene sulfonaMide N-carbaMoyl-2-Methyl benzene sulfonaMide 39051-77-9 C8H10N2O3S
Capecitabin iMpurity Capecitabin iMpurity 71609-08-0 C9H12FN3O4
4-[[(2RS)-2-Hydroxy-3-(isopropylaMino)propyl]oxy]benzaldehydeHydrochloride (4-[(2RS)-2-Hydroxy-3-[(1-Methylethyl)aMino]propoxy]benzaldehydeHydrochloride) 4-[[(2RS)-2-Hydroxy-3-(isopropylaMino)propyl]oxy]benzaldehydeHydrochloride (4-[(2RS)-2-Hydroxy-3-[(1-Methylethyl)aMino]propoxy]benzaldehydeHydrochloride)
Ethyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide Ethyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide 24683-26-9 C12H13NO5S
Sugammadex Sugammadex 1378831-29-8 C6H10O3S2
Petunidin 3-O-glucoside Petunidin 3-O-glucoside 71991-88-3 C22H23O12+
1-(2,3-Dihydro-1,4-benzodioxin-2-ylcarbonyl)piperazine hydrochloride 1-(2,3-Dihydro-1,4-benzodioxin-2-ylcarbonyl)piperazine hydrochloride 70918-74-0 C13H17ClN2O3
[4-[2-[(4-chlorobenzoyl)amino]ethyl]phenyl] 4-chlorobenzoate [4-[2-[(4-chlorobenzoyl)amino]ethyl]phenyl] 4-chlorobenzoate 41859-56-7 C22H17Cl2NO3
N-(2,4-DICHLORO-5-HYDROXYPHENYL)ACETAMIDE N-(2,4-DICHLORO-5-HYDROXYPHENYL)ACETAMIDE 67669-19-6 C8H7Cl2NO2
2-CHLOROMETHYL-3-METHYL-4-(2,2,2-TRIFLUOROETHOXY)PYRIDINE 2-CHLOROMETHYL-3-METHYL-4-(2,2,2-TRIFLUOROETHOXY)PYRIDINE 128430-66-0 C9H9ClF3NO
1-(2,3-EPOXYPROPYL)-2-METHYL-5-NITROIMIDAZOLE 1-(2,3-EPOXYPROPYL)-2-METHYL-5-NITROIMIDAZOLE 16773-52-7 C7H9N3O3
Bendamustine Related Impurity 12 Bendamustine Related Impurity 12
Bendamustine Related Impurity 3 Bendamustine Related Impurity 3
Edoxaban Impurity 26 (1R,2S,4R) Edoxaban Impurity 26 (1R,2S,4R) 1255529-33-9 C21H30ClN5O5
Ezetimibe Impurity 36 Ezetimibe Impurity 36 1809031-15-9 C39H46F2N2O5Si2
Linagliptin Impurity 29 Linagliptin Impurity 29 2074688-82-5 C58H58N16O6
Methylprednisolone Acetate EP Impurity H Methylprednisolone Acetate EP Impurity H 1968-76-9 C24H32O4
Rivaroxaban Impurity 44 Rivaroxaban Impurity 44
Sitafloxacin Impurity 3 Sitafloxacin Impurity 3
Tenofovir Impurity 39 Tenofovir Impurity 39
Ticagrelor Related Compound 82 Ticagrelor Related Compound 82
Vonoprazan Impurity 20 Vonoprazan Impurity 20
N-(2,6-Dimethylphenyl)-4-[2-hydroxy-3-(4-methoxyphenoxy)propyl]-1-piperazineacetamide N-(2,6-Dimethylphenyl)-4-[2-hydroxy-3-(4-methoxyphenoxy)propyl]-1-piperazineacetamide 1393717-45-7 C24H33N3O4
methyl (4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(ethyl)carbamate methyl (4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(ethyl)carbamate 1361570-27-5 C21H21FN8O2
Cefathiamidine Impurity G Cefathiamidine Impurity G
Olaparib Impurity P Olaparib Impurity P
Ozagrel Impurity 1 Ozagrel Impurity 1
Pidotimod Impurity P Pidotimod Impurity P
Pitavastatin Impurity 11 Pitavastatin Impurity 11
OFLOXACIN N-OXIDE (MIXTURE OF DIASTEREOMERS) OFLOXACIN N-OXIDE (MIXTURE OF DIASTEREOMERS) 104721-52-0 C18H20FN3O5
4-[[2-(2-Amino-4-thiazolyl)acetyl]amino]-benzeneacetic Acid 4-[[2-(2-Amino-4-thiazolyl)acetyl]amino]-benzeneacetic Acid 1365244-64-9 C13H13N3O3S
PEONIN CHLORIDE(SH) PEONIN CHLORIDE(SH) 132-37-6 C28H33ClO16
NICERGOLINE IMPURITY A NICERGOLINE IMPURITY A
AZITHROMYCIN IMPURITY B AZITHROMYCIN IMPURITY B 307974-61-4 C38H72N2O11
Pramipexole Impurity 18 Pramipexole Impurity 18
Tenofovir disoproxil Impurity 18 Tenofovir disoproxil Impurity 18
Tenofovir Impurity 50 Tenofovir Impurity 50
Darunavir Darunavir 1526916-57-3 C22H31N3O5S
(S)-3-(4-(2,5-dibromobenzyl)phenoxy)tetrahydrofuran (S)-3-(4-(2,5-dibromobenzyl)phenoxy)tetrahydrofuran C17H16Br2O2
METOPROLOL IMPURITY A METOPROLOL IMPURITY A C15H25NO3
1026009-77-7 1026009-77-7 1026009-77-7 C20H22N2O
α,α,α'',5-Tetramethyl-1,3-benzenediacetonitrile α,α,α'',5-Tetramethyl-1,3-benzenediacetonitrile 120512-38-1 C14H16N2
Regorafenib Impurity MJ Regorafenib Impurity MJ
Aztreonam Open-Ring Desulfurization Impurity Aztreonam Open-Ring Desulfurization Impurity
Azlocillin dioxide Impurity Azlocillin dioxide Impurity
7-(2-methoxypropanoyl)-5H-chromeno[2,3-b]pyridin-5-one 7-(2-methoxypropanoyl)-5H-chromeno[2,3-b]pyridin-5-one
Ibrutinib Impurity 42 Ibrutinib Impurity 42 2031255-24-8 C25H23N5O3
Pramipexole Impurity N Pramipexole Impurity N
Hydroxychloroquine Impurity 12 Hydrochloride Hydroxychloroquine Impurity 12 Hydrochloride 2411340-31-1 C18H26ClN3O
Verteporfin impurity Verteporfin impurity 121310-58-5 C40H40N4O8
Peramivir Impurity 25 Peramivir Impurity 25
Peramivir Impurity 33 Peramivir Impurity 33 2758048-78-9 C18H34N2O5
Imatinib impurity XT Imatinib impurity XT
ethyl 3-acetoxy-2-butenoate ethyl 3-acetoxy-2-butenoate 29214-62-8 C8H12O4
2-(bromomethyl)-2-(2,4-dichlorophenyl)-1,3-dioxolane-4-methanol 2-(bromomethyl)-2-(2,4-dichlorophenyl)-1,3-dioxolane-4-methanol 68751-57-5 C11H11BrCl2O3
INDEX NAME NOT YET ASSIGNED INDEX NAME NOT YET ASSIGNED 2511244-96-3 C27H36N2O6
Oseltamivir Impurity 91 Oseltamivir Impurity 91
Oseltamivir Impurity 80 Oseltamivir Impurity 80
Oseltamivir Impurity 72 Oseltamivir Impurity 72
4(1H)-Quinazolinone, 6,8-dibromo-3-cyclohexyl-2,3-dihydro- 4(1H)-Quinazolinone, 6,8-dibromo-3-cyclohexyl-2,3-dihydro- 2512203-87-9 C14H16Br2N2O
Linagliptin impurity KH-3 Linagliptin impurity KH-3 2279114-27-9 C30H37N7O6
11beta,21-dihydroxypregna-1,4,16-triene-3,20-dione 21-acetate 11beta,21-dihydroxypregna-1,4,16-triene-3,20-dione 21-acetate 3044-42-6 C23H28O5
FEXOFENADINE EP IMPURITY A - HCl FEXOFENADINE EP IMPURITY A - HCl 153439-43-1 C32H38ClNO4
2-[(4-Chloro-3-Methyl-2-Pyridinyl-methyl)thio]-1H-Benzimidazole 2-[(4-Chloro-3-Methyl-2-Pyridinyl-methyl)thio]-1H-Benzimidazole 103312-62-5 C14H12ClN3S
Pazufloxacin Pazufloxacin 127046-18-8 C18H19FN2O4
Vinpocetine Vinpocetine 80038-06-8 C22H26N2O2
7-(but-2-yn-1-yl)-8-(3-(hydroxyimino)piperidin-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-3,7-dihydro-1H-purine-2,6-dione 7-(but-2-yn-1-yl)-8-(3-(hydroxyimino)piperidin-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-3,7-dihydro-1H-purine-2,6-dione 1297273-94-9
Isavuconazole Impurity 35 Isavuconazole Impurity 35
Brivaracetam Impurity 26 HCl Brivaracetam Impurity 26 HCl
Brivaracet amoxidation Impurity 1 Brivaracet amoxidation Impurity 1
NA NA
NA NA
Peramivir Diacetyl Impurity Peramivir Diacetyl Impurity
Peramivir Chlorisomeric Impurity Peramivir Chlorisomeric Impurity
NA NA
Pemetrexed Impurities 41-45 Pemetrexed Impurities 41-45
NA NA
Bumetanide Impurity 999 Bumetanide Impurity 999
Canagliflozin Impurity 998 Canagliflozin Impurity 998
N,N-dimethyl-1,4,8,11-tetraazacyclotetradecane-1-sulfonamide N,N-dimethyl-1,4,8,11-tetraazacyclotetradecane-1-sulfonamide
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