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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
6-bromo-4-((dimethylamino)methyl)-5-hydroxy-N,1-dimethyl-2-((phenylthio)methyl)-1H-indole-3-carboxamide 6-bromo-4-((dimethylamino)methyl)-5-hydroxy-N,1-dimethyl-2-((phenylthio)methyl)-1H-indole-3-carboxamide
Dapoxetine impurity 54 Dapoxetine impurity 54
Doxofylline Impurity 21 Doxofylline Impurity 21
Dapoxetine impurity 60 Dapoxetine impurity 60
Bosutinib Impurity 37 Bosutinib Impurity 37 2095306-27-5 C39H30Cl4N6O6
ADRENOCHROME ADRENOCHROME 54-06-8 C9H9NO3
TELMISARTAN-D3 TELMISARTAN-D3 1189889-44-8 C33H27D3N4O2
3-Chloro-4-morpholino-1,2,5-thiadiazole 3-Chloro-4-morpholino-1,2,5-thiadiazole 30165-96-9 C6H8ClN3OS
1-(4-NITRO-PHENYL)-PIPERIDIN-2-ONE 1-(4-NITRO-PHENYL)-PIPERIDIN-2-ONE 39257-91-5 C5H10O2S
Atomoxetine impurity D CRS Atomoxetine impurity D CRS 873310-29-3 C17H21NO
Beraprost Impurity 2 Beraprost Impurity 2
Brivudine Impurity 2 Brivudine Impurity 2
3-METHOXYCARBONYLAMINO-4-METHYLPYRIDINE 3-METHOXYCARBONYLAMINO-4-METHYLPYRIDINE 694495-63-1 C8H10N2O2
4-chloro-6-(1-(6-ethyl-5-fluoropyrimidin-4-yl)ethyl)-5-fluoropyrimidine 4-chloro-6-(1-(6-ethyl-5-fluoropyrimidin-4-yl)ethyl)-5-fluoropyrimidine
Empagliflozin Impurity 74 Empagliflozin Impurity 74
Empagliflozin Impurity 78 Empagliflozin Impurity 78
Empagliflozin Impurity 85 Empagliflozin Impurity 85
Relugolix Impurity 11 Relugolix Impurity 11
(8S,16S,Z)-16-amino-5-(2-aminothiazol-4-yl)-11-imino-2,2-dimethyl-6,9-dioxo-8-((S)-1-(sulfoamino)ethyl)-3-oxa-4,7,10,12-tetraazaheptadec-4-ene-1,17-dioic acid (8S,16S,Z)-16-amino-5-(2-aminothiazol-4-yl)-11-imino-2,2-dimethyl-6,9-dioxo-8-((S)-1-(sulfoamino)ethyl)-3-oxa-4,7,10,12-tetraazaheptadec-4-ene-1,17-dioic acid
1-(3,4-bis(hydroxymethyl)-1H-pyrrol-2-yl)ethan-1-one 1-(3,4-bis(hydroxymethyl)-1H-pyrrol-2-yl)ethan-1-one
Gadobutrol Impurity 32 Gadobutrol Impurity 32 C14H23GdN4O6
Ornidazole Impurity 23 Ornidazole Impurity 23 1100750-18-2
Olanzapine impurity CNB Olanzapine impurity CNB
Pitavastatin Impurity 74 Pitavastatin Impurity 74 167934-30-7 C29H30FNO4
Etoricoxib Impurity 35 Etoricoxib Impurity 35 855307-79-8 C18H13ClN2O2S
Febuxostat Impurity 102 Febuxostat Impurity 102
Ticagrelor Impurity 131 Ticagrelor Impurity 131
door bird impurities door bird impurities
Topiroxostat Impurity 41 Topiroxostat Impurity 41
1-((2R,3R)-3-(4-(4-cyanophenyl)thiazol-2-yl)-2-(2,5-difluorophenyl)-2-hydroxybutyl)-4-(1-((methyl(3-((2-(methylamino)acetoxy)methyl)pyridin-1-oxide-2-yl)carbamoyl)oxy)ethyl)-1H-1,2,4-triazol-4-ium 1-((2R,3R)-3-(4-(4-cyanophenyl)thiazol-2-yl)-2-(2,5-difluorophenyl)-2-hydroxybutyl)-4-(1-((methyl(3-((2-(methylamino)acetoxy)methyl)pyridin-1-oxide-2-yl)carbamoyl)oxy)ethyl)-1H-1,2,4-triazol-4-ium
2-Piperidinecarboxylic acid, 1-formyl-, (1S,2R,3S,6R,7E,10S,12S)-3-hydroxy-1-[(1E)-2-[(1R,3R,4R)-4-hydroxy-3-methoxycyclohexyl]-1-methylethenyl]-12-methoxy-2,8,10-trimethyl-5-oxo-6-(2-propen-1-yl)-12-[(2R,3S,5R)-tetrahydro-3-methoxy-5-methyl-6-oxo-2H-pyran-2-yl]-7-dodecen-1-yl ester, (2S)- 2-Piperidinecarboxylic acid, 1-formyl-, (1S,2R,3S,6R,7E,10S,12S)-3-hydroxy-1-[(1E)-2-[(1R,3R,4R)-4-hydroxy-3-methoxycyclohexyl]-1-methylethenyl]-12-methoxy-2,8,10-trimethyl-5-oxo-6-(2-propen-1-yl)-12-[(2R,3S,5R)-tetrahydro-3-methoxy-5-methyl-6-oxo-2H-pyran-2-yl]-7-dodecen-1-yl ester, (2S)- 143210-33-7 C43H69NO11
Blonanserin Impurity 15 Blonanserin Impurity 15 143213-96-1 C17H17ClFNO
1H-Pyrazole-1-propanoic acid, β-cyclopentyl-4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-, (βR)- 1H-Pyrazole-1-propanoic acid, β-cyclopentyl-4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-, (βR)- 2102675-40-9 C17H19N5O2
(2S,5R)-2-carbamoyl-7-oxo-1,6-diazabicyclo[3.2.1]octan-6-yl ethyl sulfate (2S,5R)-2-carbamoyl-7-oxo-1,6-diazabicyclo[3.2.1]octan-6-yl ethyl sulfate
sodium ((S)-4-(4-(2-(2-amino-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d] pyrimidin-5-yl)ethyl)benzamido)-4-carboxylatobutanoyl)-L-glutamate sodium ((S)-4-(4-(2-(2-amino-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d] pyrimidin-5-yl)ethyl)benzamido)-4-carboxylatobutanoyl)-L-glutamate
1H-Purin-2-amine, 6,9-dihydro-9-[(1S,3R,4S)-2-methylene-4-(phenylmethoxy)-3-[(phenylmethoxy)methyl]cyclopentyl]-6-(phenylmethoxy)-N-(triphenylmethyl)- 1H-Purin-2-amine, 6,9-dihydro-9-[(1S,3R,4S)-2-methylene-4-(phenylmethoxy)-3-[(phenylmethoxy)methyl]cyclopentyl]-6-(phenylmethoxy)-N-(triphenylmethyl)- 2097265-84-2 C52H49N5O3
6,6'-oxybis(3-((4-oxo-3,4-dihydrophthalazin-1-yl)methyl)benzonitrile) 6,6'-oxybis(3-((4-oxo-3,4-dihydrophthalazin-1-yl)methyl)benzonitrile)
Glycine, N-[(1-ethyl-4-hydroxy-7-phenoxy-3-isoquinolinyl)carbonyl]- Glycine, N-[(1-ethyl-4-hydroxy-7-phenoxy-3-isoquinolinyl)carbonyl]- 808120-20-9 C20H18N2O5
Vonoprazan Impurity 55 Vonoprazan Impurity 55
N-(5-((diphenylphosphoryl)methyl)-4-(2-fluorophenyl)-6-isopropylpyrimidin-2-yl)-N-methylmethanesulfonamide N-(5-((diphenylphosphoryl)methyl)-4-(2-fluorophenyl)-6-isopropylpyrimidin-2-yl)-N-methylmethanesulfonamide
Ethane, 1,1,1-trichloro-2,2,2-trimethoxy- Ethane, 1,1,1-trichloro-2,2,2-trimethoxy- 19932-79-7 C5H9Cl3O3
Budesonide Impurity 29 Budesonide Impurity 29
Budesonide Impurity 20 Budesonide Impurity 20
Glycine, N-[(4-methylphenyl)sulfonyl]glycyl-, ethyl ester Glycine, N-[(4-methylphenyl)sulfonyl]glycyl-, ethyl ester 2478-45-7 C13H18N2O5S
Pneumocandin B0, 1-[(4R,5S)-5-[(2-aminoethyl)amino]-N2-[(10R,12S)-10,12-dimethyl-1-oxotetradecyl]-4-hydroxy-L-ornithine]- Pneumocandin B0, 1-[(4R,5S)-5-[(2-aminoethyl)amino]-N2-[(10R,12S)-10,12-dimethyl-1-oxotetradecyl]-4-hydroxy-L-ornithine]- 1404083-47-1 C52H86N10O16
2-Piperidinone, 3-chloro-1-(4-nitrophenyl)- 2-Piperidinone, 3-chloro-1-(4-nitrophenyl)- 2512213-45-3 C11H11ClN2O3
Avatrombopag Impurity 40 Avatrombopag Impurity 40
(E)-3-(4-((3-(1-(4-((1H-imidazol-1-yl)methyl)phenyl)-2-carboxyethyl)-1H-imidazol-3-ium-1-yl)methyl)phenyl)acrylate (E)-3-(4-((3-(1-(4-((1H-imidazol-1-yl)methyl)phenyl)-2-carboxyethyl)-1H-imidazol-3-ium-1-yl)methyl)phenyl)acrylate
Cisatracurium besylate impurity 21 Cisatracurium besylate impurity 21
Dacomitinib Impurity Dacomitinib Impurity
6-O-DESMETHYL DONEPEZIL 6-O-DESMETHYL DONEPEZIL 120013-56-1 C23H27NO3
2-(2-METHYL-4-NITRO-IMIDAZOL-1-YL)-ETHANOL 2-(2-METHYL-4-NITRO-IMIDAZOL-1-YL)-ETHANOL 705-19-1 C6H9N3O3
2,6-DIMETHYL-4-(3-NITRO-PHENYL)-PYRIDINE-3,5-DICARBOXYLIC ACID DIMETHYL ESTER 2,6-DIMETHYL-4-(3-NITRO-PHENYL)-PYRIDINE-3,5-DICARBOXYLIC ACID DIMETHYL ESTER 76258-20-3 C17H16N2O6
3-(2-TRIFLUOROMETHYL-PHENYL)-PROPAN-1-OL 3-(2-TRIFLUOROMETHYL-PHENYL)-PROPAN-1-OL 191155-81-4 C10H11F3O
2-ethoxy-1-methoxy-4-(2-(methylsulfonyl)ethyl)benzene 2-ethoxy-1-methoxy-4-(2-(methylsulfonyl)ethyl)benzene C12H18O4S
Bendamustine Related Impurity 17 Bendamustine Related Impurity 17
Bortezomib Impurity 24 Bortezomib Impurity 24
Bortezomib Impurity 38 Bortezomib Impurity 38
Edoxaban Impurity 27 Edoxaban Impurity 27
Linagliptin Impurity 30 Linagliptin Impurity 30 2074688-81-4 C33H32N8O5
Pantoprazole Impurity 8 Pantoprazole Impurity 8
Rivaroxaban Impurity 58 Rivaroxaban Impurity 58
Rivaroxaban Impurity 65 Rivaroxaban Impurity 65
Sitafloxacin Impurity 4 Sitafloxacin Impurity 4
Ticagrelor Related Compound 83 Ticagrelor Related Compound 83
Ticagrelor Related Compound 91 Ticagrelor Related Compound 91
Vonoprazan Impurity 21 Vonoprazan Impurity 21
Ceftazidime Oxide Impurity Ceftazidime Oxide Impurity 1301254-48-7 C22H22N6O8S2
N-(2,6-dimethylphenyl)-2-(4-(2-hydroxy-3-(4-methoxyphenoxy)propyl)piperazin-1-yl)acetamide N-(2,6-dimethylphenyl)-2-(4-(2-hydroxy-3-(4-methoxyphenoxy)propyl)piperazin-1-yl)acetamide 1393717-46-8 C24H33N3O4
Atracurium Impurity 2 Atracurium Impurity 2
Blonanserin Impurity J Blonanserin Impurity J
Brexpiprazole Impurity E Brexpiprazole Impurity E
Cefazolin USP Impurity B Cefazolin USP Impurity B
Everolimus Impurity D Everolimus Impurity D
Loratadine Impurity I Loratadine Impurity I 133330-56-0 C22H21ClN2O2
Olaparib Impurity Q Olaparib Impurity Q
Ozagrel Impurity 3 Ozagrel Impurity 3
Pitavastatin Impurity 12 Pitavastatin Impurity 12
(6S,7S)-2-amino-6-(propylamino)-4,5,6,7-tetrahydro-1,3-benzothiazol-7-ol (6S,7S)-2-amino-6-(propylamino)-4,5,6,7-tetrahydro-1,3-benzothiazol-7-ol
Melphalan EP impurity H Melphalan EP impurity H 88457-23-2 C14H20Cl2N2O2
ethyl 2-(4-(sec-butoxy)-3-formylphenyl)-4-methylthiazole-5- carboxylate ethyl 2-(4-(sec-butoxy)-3-formylphenyl)-4-methylthiazole-5- carboxylate 2375033-31-9 C18H21NO4S
Canagliflozin Impurity 33 Canagliflozin Impurity 33
Loratadine Impurity 14 Loratadine Impurity 14 169253-13-8 C22H23ClN2O2
Metronidazole Impurity 3 Metronidazole Impurity 3 5006-79-1 C6H7N3O2
Nifedipine Impurity 9 Nifedipine Impurity 9 87625-92-1 C15H15NO5
Peramivir Impurity 7 HCl Peramivir Impurity 7 HCl 1352062-19-1 C14H27ClN2O4
Butylphthalide impurity Butylphthalide impurity 380905-48-6 C12H16O3
Dapoxetine impurity Dapoxetine impurity 2242008-38-2 C30H32ClNO2
Esomeprazole Impurity 26 Esomeprazole Impurity 26 704910-88-3 C15H15N3OS
Pregabalin Impurity 25 Pregabalin Impurity 25
Loxoprofen Loxoprofen 50882-18-3 C7H10O3
Ropivacaine impurity Ropivacaine impurity 1543937-58-1 C13H16N2O3
Mono Oxidation Sugammadex(Org198958-2) Mono Oxidation Sugammadex(Org198958-2) 2412953-13-8 C72H113NaO49S8
3,3'-(oxybis(ethane-1,1-diyl))bis(1,2-dimethylbenzene) 3,3'-(oxybis(ethane-1,1-diyl))bis(1,2-dimethylbenzene) C20H26O
Piperacillin Impurity 4 Piperacillin Impurity 4
(R)-3-amino-4-phenyl-1-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4] triazolo[4,3-a]pyrazin-7(8H)-yl)butan-1-one (R)-3-amino-4-phenyl-1-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4] triazolo[4,3-a]pyrazin-7(8H)-yl)butan-1-one C16H18F3N5O
Amlodipine Impurity 30 Amlodipine Impurity 30 95574-97-3 C4H7ClO3
Axitinib Impurity 24 Axitinib Impurity 24
Rasagiline Impurity 3 Rasagiline Impurity 3 1175018-74-2 C12H14ClN
Enrofloxacin EP Impurity C Enrofloxacin EP Impurity C 138892-82-7 C19H23N3O3
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