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Keywords: 18162-48-6 , 872-50-4 , Methylene Chloride , naphthalene , THF , Titanium Dioxide

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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
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
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
Donepezil Impurity 3 Donepezil Impurity 3 1023500-88-0 C24H27NO4
Fesoterodine Related Impurity 4 Fesoterodine Related Impurity 4 214601-12-4 C22H29NO2
Prasugrel Impurity 14 Maleate Prasugrel Impurity 14 Maleate 1373350-60-7 C24H25BrFNO7S
Sofosbuvir Impurity 32 Sofosbuvir Impurity 32 1157884-58-6 C20H17FO6
Torsemide Related Compound 1 Torsemide Related Compound 1 947327-54-0 C13H13N3O2S
Vortioxetine Impurity 3 Vortioxetine Impurity 3 508233-82-7 C17H20N2S
CYCLOPENTYL BENZOATE CYCLOPENTYL BENZOATE 32651-38-0 C12H14O2
4,5-DICHLOROTHIOPHENE-2-CARBOXYLIC ACID 4,5-DICHLOROTHIOPHENE-2-CARBOXYLIC ACID 31166-29-7 C5H2Cl2O2S
N,O-Dibenzylated formoterol N,O-Dibenzylated formoterol 43229-70-5 C33H36N2O4
Entacapone Entacapone
nifedipine iMpurity nifedipine iMpurity C19H22N2O6
Linagliptin Impurity A Linagliptin Impurity A
Dehydropitavastatin ethyl ester Dehydropitavastatin ethyl ester 254452-91-0 C27H26FNO4
(S)-2-(2-oxo-4-propyl-2,5-dihydro-1H-pyrrol-1-yl)butanamide (S)-2-(2-oxo-4-propyl-2,5-dihydro-1H-pyrrol-1-yl)butanamide 357338-13-7 C11H18N2O2
Linagliptin Impurity V Linagliptin Impurity V
methyl 2-(4-(2-chloroethyl)phenyl)-2-methylpropanoate methyl 2-(4-(2-chloroethyl)phenyl)-2-methylpropanoate 1181267-33-3 C13H17ClO2
(2RS)-1-bromo-2-(2,4-difluorophenyl)-3-(1H-1,2,4-triazol-1-yl)propan-2-ol (2RS)-1-bromo-2-(2,4-difluorophenyl)-3-(1H-1,2,4-triazol-1-yl)propan-2-ol 150194-52-8 C11H10BrF2N3O
(S)-2-(((1R,2S,5S)-2-(2-((5-chloropyridin-2-yl)amino)-2-oxoacetamido)-5-(dimethylcarbamoyl)cyclohexyl)carbamoyl)-5-methyl-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridine 5-oxide (S)-2-(((1R,2S,5S)-2-(2-((5-chloropyridin-2-yl)amino)-2-oxoacetamido)-5-(dimethylcarbamoyl)cyclohexyl)carbamoyl)-5-methyl-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridine 5-oxide C24H30ClN7O5S
Etoricoxib Impurity 18 Etoricoxib Impurity 18
Ibrutinib Impurity 4 Ibrutinib Impurity 4 1807619-68-6 C17H12ClN5O
Imatinib Impurity 3 Imatinib Impurity 3
Mirabegron Impurity 16 Mirabegron Impurity 16
Olaparib Impurity 2 Olaparib Impurity 2
Sofosbuvir Impurity 7 Sofosbuvir Impurity 7 1884385-12-9 C20H19FO6
Vonoprazan Impurity 3 Vonoprazan Impurity 3 928325-41-1 C17H15F2N3O2S
Cinacalcet Impurity 22 Cinacalcet Impurity 22
Dapagliflozin Impurity C Dapagliflozin Impurity C
Dasatinib Impurity E Dasatinib Impurity E
Ixazomib Impurity Ixazomib Impurity
Nevirapine Impurity Nevirapine Impurity
Omarigliptin Impurity Omarigliptin Impurity 1819364-01-6 C16H18F2N4O
Palbociclib Impurity 8 Palbociclib Impurity 8 827022-31-1 C31H41N7O4
Sitagliptin EP Impurity C Sitagliptin EP Impurity C 1345822-86-7 C16H19F5N5O5P
Trifluridine Impurity Trifluridine Impurity 2086328-10-9
Valsartan related compound H Valsartan related compound H
Vildagliptin Related Compound H Vildagliptin Related Compound H 2253194-13-5 C12H16N4O
Moxifloxacin Impurity 7 Moxifloxacin Impurity 7
(R)-6-Benzyloxy-8-(oxiran-2-yl)-4H-benzo[1,4]oxazin-3-one (R)-6-Benzyloxy-8-(oxiran-2-yl)-4H-benzo[1,4]oxazin-3-one 869478-12-6 C17H15NO4
Merariveron impurity D Merariveron impurity D C26H28N6O3S2
Cefazolin impurity E Cefazolin impurity E
Lamivudine Impurity Mixture Lamivudine Impurity Mixture
Rifaximin impurity B Rifaximin impurity B 1351775-04-6 C43H49N3O11
4-(3-(Piperidin-1-yl)propoxy)benzoic acid 4-(3-(Piperidin-1-yl)propoxy)benzoic acid 767286-87-3 C15H21NO3
5-Chloro-3-sulfino-2-thiophenecarboxylic acid 5-Chloro-3-sulfino-2-thiophenecarboxylic acid 187746-97-0 C5H3ClO4S2
ethyl (S)-10-fluoro-3-methyl-7-oxo- 2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate ethyl (S)-10-fluoro-3-methyl-7-oxo- 2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylate 431058-46-7 C15H14FNO4
methyl (Z)-3-(((4-(methylamino)phenyl)amino)(phenyl)methylene)-2-oxoindoline-6-carboxylate methyl (Z)-3-(((4-(methylamino)phenyl)amino)(phenyl)methylene)-2-oxoindoline-6-carboxylate C24H21N3O3
Isavuconazole Impurity 11 Isavuconazole Impurity 11 2732924-99-9 C10H16ClN3O2
Levosimendan Impurity 2 Levosimendan Impurity 2 103416-88-2 C11H12N2O2
Aprepitant EP Impurity B Aprepitant EP Impurity B 2206606-86-0 C29H25F7N4O3
Famotidine EP Impurity A Famotidine EP Impurity A 88061-72-7 C8H15N7O2S3
Meloxicam EP Impurity D Meloxicam EP Impurity D 1331636-17-9 C16H17N3O4S2
Erythromycin Impurity Erythromycin Impurity 40554-78-7 C37H65NO12
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