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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
PeraMpanel PeraMpanel 152846-62-3 C10H10BNO2
Rasagiline Impurity 5 Mesylate Rasagiline Impurity 5 Mesylate 1312077-04-5 C13H15NO4S
2-Propanol, 1,1'-[methylenebis(4,1-phenyleneoxy)]bis[3-[(1-methylethyl)amino]- 2-Propanol, 1,1'-[methylenebis(4,1-phenyleneoxy)]bis[3-[(1-methylethyl)amino]- 1225195-70-9 C25H38N2O4
INDEX NAME NOT YET ASSIGNED INDEX NAME NOT YET ASSIGNED 2031272-32-7 C47H40N4O4
(4R,5S,6S)-3-[[(3S,5S)-1-[(4-Aminophenyl)methyl]-5-[[(3-carboxyphenyl)amino]carbonyl]-3-pyrrolidinyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylic Acid Sodium Salt (4R,5S,6S)-3-[[(3S,5S)-1-[(4-Aminophenyl)methyl]-5-[[(3-carboxyphenyl)amino]carbonyl]-3-pyrrolidinyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylic Acid Sodium Salt 866186-66-5 C29H33N4NaO7S
(R)-cis-5ξ-Methyl Atracurium Dibesylate (R)-cis-5ξ-Methyl Atracurium Dibesylate 1193104-82-3 C60H79N2O15S+
2-(((Z)-(1-(2-Aminothiazol-4-yl)-2-(((2R,3R)-2-methyl-4-oxo-1-sulfoazetidin-3-yl)amino)-2-oxoethylidene)amino)oxy)-2-methylpropanoic Acid 2-(((Z)-(1-(2-Aminothiazol-4-yl)-2-(((2R,3R)-2-methyl-4-oxo-1-sulfoazetidin-3-yl)amino)-2-oxoethylidene)amino)oxy)-2-methylpropanoic Acid C13H17N5O8S2
7-[4-[2-[[[4-(3-Carboxy-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinolin-7-yl)-1-piperazinyl]carbonyl]oxy]-3-oxobutyl]-1-piperazinyl]-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acid 7-[4-[2-[[[4-(3-Carboxy-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinolin-7-yl)-1-piperazinyl]carbonyl]oxy]-3-oxobutyl]-1-piperazinyl]-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acid 156834-58-1 C37H36F2N6O9S2
(6R,7S)-7-ACCA (6R,7S)-7-ACCA 108260-07-7 C7H7ClN2O3S
Enrofloxacin Impurity 1 Enrofloxacin Impurity 1 1128234-60-5 C19H22ClN3O3
Peramivir Impurity 20 Peramivir Impurity 20
Ambroxol Impurity 33 Ambroxol Impurity 33 199472-91-8 C13H20N2O
Bilastine Impurity 12 Bilastine Impurity 12 1638785-18-8 C30H42N4O3
Tadalafil Impurity 66 Tadalafil Impurity 66 1598416-07-9 C21H18N2O5
Peramivir Impurity 36 Peramivir Impurity 36
4-CHLORO-7-(2-CHLORO-ETHOXY)-6-(2-METHOXY-ETHOXY)-QUINAZOLINE 4-CHLORO-7-(2-CHLORO-ETHOXY)-6-(2-METHOXY-ETHOXY)-QUINAZOLINE 183322-20-5 C13H14Cl2N2O3
METHYL 2-(O-NITROBENZYLIDENE)-ACETOACETATE METHYL 2-(O-NITROBENZYLIDENE)-ACETOACETATE 39562-27-1 C12H11NO5
Sugammadex sodium Impurity 48 Sugammadex sodium Impurity 48
Sugammadex sodium Impurity 47 Sugammadex sodium Impurity 47
Tenofovir Impurity 95 Tenofovir Impurity 95 1884329-63-8 C8H10BrN5
Tenofovir Impurity 117 Tenofovir Impurity 117 1643116-22-6 C8H11N5O
Tafluprost Impurity E Tafluprost Impurity E
Cabozantinib impurity 36 Cabozantinib impurity 36
Dapoxetine impurity 69 Dapoxetine impurity 69
4-FLUORO-2-METHYLBENZAMIDE 4-FLUORO-2-METHYLBENZAMIDE 886501-45-7 C8H8FNO
1-{[4-BENZYL-2-(3,4-DIMETHOXYPHENYL)-4H-CHROMEN-3-YL]METHYL}PIPERIDINIUM CHLORIDE 1-{[4-BENZYL-2-(3,4-DIMETHOXYPHENYL)-4H-CHROMEN-3-YL]METHYL}PIPERIDINIUM CHLORIDE C30H34ClNO3
4-Hydroxyisophthalonitrile 4-Hydroxyisophthalonitrile 34133-58-9 C8H4N2O
Empagliflozin Impurity 81 Empagliflozin Impurity 81
Iohexol Impurity M Iohexol Impurity M
Relugolix Impurity 18 Relugolix Impurity 18
Rabeprazole Impurity 15 Rabeprazole Impurity 15
4-((2-amino-2-oxoethyl)(hydroxy)amino)butanoic acid 4-((2-amino-2-oxoethyl)(hydroxy)amino)butanoic acid 2454698-45-2 C6H12N2O4
Lenvatinib Impurity LFZZ-8 Lenvatinib Impurity LFZZ-8 C44H40Cl2N8O8
Pemetrexed disodium Impurity 19 Pemetrexed disodium Impurity 19
Brivaracetam Impurity 32 Brivaracetam Impurity 32
1-((2R,3R)-3-(4-(aminomethyl)thiazol-2-yl)-2-(2,5-difluorophenyl)-2-hydroxybutyl)-4-(1-((methyl(3-((2-(methylamino)acetoxy)methyl)pyridin-2-yl)carbamoyl)oxy)ethyl)-1H-1,2,4-triazol-4-ium chloride 1-((2R,3R)-3-(4-(aminomethyl)thiazol-2-yl)-2-(2,5-difluorophenyl)-2-hydroxybutyl)-4-(1-((methyl(3-((2-(methylamino)acetoxy)methyl)pyridin-2-yl)carbamoyl)oxy)ethyl)-1H-1,2,4-triazol-4-ium chloride
Ticagrelor Impurity 107 Ticagrelor Impurity 107
2-Thiazolamine, 5-bromo-4-(5-bromo-4-chloro-2-thienyl)- 2-Thiazolamine, 5-bromo-4-(5-bromo-4-chloro-2-thienyl)- 2401867-89-6 C7H3Br2ClN2S2
Carbamic acid, N-[1,1'-biphenyl]-2-yl-, 1-[2-[[4-(hydroxymethyl)benzoyl]methylamino]ethyl]-4-piperidinyl ester Carbamic acid, N-[1,1'-biphenyl]-2-yl-, 1-[2-[[4-(hydroxymethyl)benzoyl]methylamino]ethyl]-4-piperidinyl ester 1682660-39-4 C29H33N3O4
sodium 3-(4-((1H-imidazol-1-yl)methyl)phenyl)-3-hydroxypropanoate sodium 3-(4-((1H-imidazol-1-yl)methyl)phenyl)-3-hydroxypropanoate
(4S,6R)-((4R,6S)-6-(2-(tert-butoxy)-2-oxoethyl)-2,2-dimethyl-1,3-dioxan-4-yl)methyl 6-(2-(tert-butoxy)-2-oxoethyl)-2,2-dimethyl-1,3-dioxane-4-carboxylate (4S,6R)-((4R,6S)-6-(2-(tert-butoxy)-2-oxoethyl)-2,2-dimethyl-1,3-dioxan-4-yl)methyl 6-(2-(tert-butoxy)-2-oxoethyl)-2,2-dimethyl-1,3-dioxane-4-carboxylate
tert-butyl 2-(((Z)-(1-(2-aminothiazol-4-yl)-2-(((2S,3S)-2-methyl-4- oxoazetidin-3-yl)amino)-2-oxoethylidene)amino)oxy)-2-methyl propanoate tert-butyl 2-(((Z)-(1-(2-aminothiazol-4-yl)-2-(((2S,3S)-2-methyl-4- oxoazetidin-3-yl)amino)-2-oxoethylidene)amino)oxy)-2-methyl propanoate
Atomoxetine Impurity 15 Atomoxetine Impurity 15 881995-45-5 C19H23NO2
Pitavastatin Impurity 13 (Pitavastatin 2,4,6-Triene Impurity) Pitavastatin Impurity 13 (Pitavastatin 2,4,6-Triene Impurity) 2086271-67-0 C25H20FNO2
(2S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-1,3-oxathiolane-2- carboxylic acid sodium (2S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-1,3-oxathiolane-2- carboxylic acid sodium
impurity 39 impurity 39
(2R,3R,4R,5S)-6-((2,4-dibromo-6-((cyclohexyl(methyl)amino)methyl)phenyl)amino)hexane-1,2,3,4,5-pentaol (2R,3R,4R,5S)-6-((2,4-dibromo-6-((cyclohexyl(methyl)amino)methyl)phenyl)amino)hexane-1,2,3,4,5-pentaol
Bosutinib Impurity 32 Bosutinib Impurity 32
6,6'-Methylenebis[1,2,3,9-tetrahydro-9-methyl-3-methylene-4H-carbazol-4-one 6,6'-Methylenebis[1,2,3,9-tetrahydro-9-methyl-3-methylene-4H-carbazol-4-one 1365727-09-8 C29H26N2O2
Ampicillin Dimer Disodium Salt Ampicillin Dimer Disodium Salt 94730-51-5 C32H39N6NaO8S2
4-Thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, 6-(1-hydroxyethyl)-7-oxo-3-(tetrahydro-2-furanyl)-, [5R-[3(S*),5α,6α(R*)]]- (9CI) 4-Thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, 6-(1-hydroxyethyl)-7-oxo-3-(tetrahydro-2-furanyl)-, [5R-[3(S*),5α,6α(R*)]]- (9CI) 106560-13-8 C12H15NO5S
1-Naphthalenecarboxylic acid, 8-[[(3S)-1-azabicyclo[2.2.2]oct-3-ylamino]methyl]-5,6,7,8-tetrahydro-, (8S)- 1-Naphthalenecarboxylic acid, 8-[[(3S)-1-azabicyclo[2.2.2]oct-3-ylamino]methyl]-5,6,7,8-tetrahydro-, (8S)- 2407763-21-5 C19H26N2O2
Peramivir Impurity 58 Peramivir Impurity 58
1-Naphthalenamine, 4-(2,3-dichlorophenyl)-1,2,3,4-tetrahydro-N-methyl-, (1R,4R)-rel- 1-Naphthalenamine, 4-(2,3-dichlorophenyl)-1,2,3,4-tetrahydro-N-methyl-, (1R,4R)-rel- 2124277-87-6 C17H17Cl2N
Voriconazole toxic impurity 2 Voriconazole toxic impurity 2
Avatrombopag Impurity 31 Avatrombopag Impurity 31
Cisatracurium besylate impurity19 Cisatracurium besylate impurity19 96946-52-0 C59H77N2O15S+
Donepezil Impurity Donepezil Impurity 896134-06-8 C17H15NO4
1-(2-chloro-5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl)-N-methylmethanamine 1-(2-chloro-5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl)-N-methylmethanamine 928325-68-2 C17H15ClFN3O2S
N-methyl-N-(4-nitrophenyl)-2-(piperazin-1-yl)acetamide N-methyl-N-(4-nitrophenyl)-2-(piperazin-1-yl)acetamide 2037385-84-3 C13H19ClN4O3
N-(3,5-dimethylphenyl)picolinamide N-(3,5-dimethylphenyl)picolinamide 439591-67-0 C14H14N2O
Neratinib Impurity 6 Neratinib Impurity 6 1144516-14-2 C26H21ClN6O4
Bupivacaine Impurity Bupivacaine Impurity 852804-30-9 C22H37N2O+
Pseudomonic Acid D Pseudomonic Acid D 85248-93-7 C26H42O9
Terazosin Impurity Terazosin Impurity 60548-08-5 C19H25N5O4
1204612-29-2 1204612-29-2 1204612-29-2 C12H18ClNO2
(S)-3-(dimethylamino)-1-(thiophen-3-yl)propan-1-ol (S)-3-(dimethylamino)-1-(thiophen-3-yl)propan-1-ol 1384080-56-1 C9H15NOS
BDJS-SH 4 BDJS-SH 4 36588-46-2 C12H18N2O2
3-Chloro TirofiBan 3-Chloro TirofiBan 2713130-63-1 C22H35ClN2O5S
Adefovir Dipivoxil Impurity E Adefovir Dipivoxil Impurity E 116384-54-4 C10H16N5O4P
Atorvastatin Impurity 22 Atorvastatin Impurity 22 1821498-27-4 C27H30FNO6
Azelastine EP Impurity E Azelastine EP Impurity E 105279-16-1 C15H9ClO2
Blonanserin impurity F Blonanserin impurity F
Capecitabine Impurity 9 Capecitabine Impurity 9
Carfilzomib Impurity E Carfilzomib Impurity E
Cefoxitin EP Impurity B Cefoxitin EP Impurity B
Dabigatran Impurity 3 Dabigatran Impurity 3
Dexamethasone EP Impurity K Dexamethasone EP Impurity K 1809224-82-5 C22H26O4
Esomeprazole Impurity 3 Esomeprazole Impurity 3 1346599-85-6 C26H30N4O4S
FeBuxostat Impurity 41 FeBuxostat Impurity 41 2428631-67-6 C19H19N3O3S
Formoterol EP Impurity E Formoterol EP Impurity E 1616967-26-0 C20H26N2O4
Formoterol Impurity 16 Formoterol Impurity 16
Indacaterol Impurity 11 Indacaterol Impurity 11
Isavuconazole Impurity 14 Isavuconazole Impurity 14
Isavuconazole Impurity 19 Isavuconazole Impurity 19
Isavuconazole Impurity 24 Isavuconazole Impurity 24 1176988-44-5 C22H17F2N5OS
Letrozole Impurity 10 Letrozole Impurity 10
Levofloxacin Impurity 9 Levofloxacin Impurity 9 1797099-76-3 C18H20FN3O4
N-(5-Formyl-2-hydroxyphenyl)formamide N-(5-Formyl-2-hydroxyphenyl)formamide 903563-43-9 C8H7NO3
Nitrendipine Impurity 5 Nitrendipine Impurity 5
Posaconazole Impurity 32 Posaconazole Impurity 32
Posaconazole Impurity 61 Posaconazole Impurity 61
Procaterol Impurity 4 Procaterol Impurity 4 63235-39-2 C16H20N2O3
Sitagliptin Impurity 14 Sitagliptin Impurity 14 2072867-07-1 C26H23F9N6O2
SofosBuvir Impurity 31 SofosBuvir Impurity 31
sofosBuvir Impurity 37 sofosBuvir Impurity 37
SofosBuvir Impurity 53 SofosBuvir Impurity 53 1015255-46-5 C20H25FN3O9P
Sofosbuvir Impurity 60 Sofosbuvir Impurity 60
Tenofovir impurity G Tenofovir impurity G
Ticagrelor Impurity 26 Ticagrelor Impurity 26 2245167-79-5 C21H24F2N6O3S
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