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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
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
Fluconazole EP Impurity I Fluconazole EP Impurity I 150168-54-0 C13H14BrF2N7O
1-benzyl-2-methyl-1H-imidazole-carbaldehyde 1-benzyl-2-methyl-1H-imidazole-carbaldehyde 39269-74-4 C12H12N2O
Sacubitril Impurity Sacubitril Impurity 1015037-46-3 C23H27NO4
Desloratadine Impurity Desloratadine Impurity 50603-12-8 C20H21N
Olaparib Impurity H Olaparib Impurity H
Brexpiprazole Impurity B Brexpiprazole Impurity B
Dapoxetine iMpurity 6 Dapoxetine iMpurity 6
Irbesartan Impurity 4 Irbesartan Impurity 4 C25H28N6O
2-cyclopentylidene-2-phenylacetic acid 2-cyclopentylidene-2-phenylacetic acid C13H14O2
Cabozantinib impurity B Cabozantinib impurity B
Metoprolol IMpurity 3 Metoprolol IMpurity 3 C15H25NO3
Mirabegron Impurity 1 Mirabegron Impurity 1
Desfluoro Pitavastatin Calcium Desfluoro Pitavastatin Calcium 847849-67-6 C25H25NO4
Plerixafor Plerixafor 548488-49-9 C12H23F3N4O
Vonoprazan Impurity 10 Vonoprazan Impurity 10
Vonoprazan Impurity 5 Vonoprazan Impurity 5
Sitagliptin IMpurity 1 Sitagliptin IMpurity 1
Etoricoxib Impurity 7 Etoricoxib Impurity 7
Ezetimibe Impurity D Ezetimibe Impurity D
Alogliptin Imp.13 Alogliptin Imp.13
Erlotinib Imp.18 Erlotinib Imp.18
Ezetimibe (RSS)-Isomer Ezetimibe (RSS)-Isomer 1478664-18-4 C24H21F2NO3
Apremilast Impurity 6 Apremilast Impurity 6
Azilsartan Impurity 16 Azilsartan Impurity 16 1417576-00-1 C28H20N4O8
Regorafenib Impurity 11 Regorafenib Impurity 11 2512204-88-3 C19H18ClFN4O3
Topiroxostat Impurity 2 Topiroxostat Impurity 2 445218-61-1 C12H11N5O
Fluvastatin Impurity 1 Fluvastatin Impurity 1 C24H26FNO4
Lornoxicam Impurity 7 Lornoxicam Impurity 7
Prednisolone Impurity A Prednisolone Impurity A C21H28O5
Tofacitinib Impurity 6 Tofacitinib Impurity 6 1640972-35-5 C16H22N6O
Afatinib Impurity 20 Afatinib Impurity 20
1-(4-Ethylphenyl)-2-methyl-2-propen-1-one 1-(4-Ethylphenyl)-2-methyl-2-propen-1-one 70639-76-8 C12H14O
Ceftriaxone Sodium impurity Ceftriaxone Sodium impurity
Ivabradine Impurity 5 Ivabradine Impurity 5 1462470-54-7 C27H38N2O6
Aprepitant Impurity 6 Aprepitant Impurity 6 170902-81-5 C23H21F7N4O3
(S)-3-((R)-5-(4-fluorophenyl)-5-hydroxy-2-((E)-4-hydroxybenzylidene)pentanoyl)-4-phenyloxazolidin-2-one (S)-3-((R)-5-(4-fluorophenyl)-5-hydroxy-2-((E)-4-hydroxybenzylidene)pentanoyl)-4-phenyloxazolidin-2-one C27H24FNO5
Alogliptin Related Compound 14 Alogliptin Related Compound 14 1820685-30-0 C18H23N5O3
(3S,5S)-Atorvastatin (sodium salt) (3S,5S)-Atorvastatin (sodium salt) 1428118-38-0 C33H36FN2NaO5
Chlorpromazine EP impurity B Chlorpromazine EP impurity B 19077-20-4 C21H28ClN3S
2-amino-4-fluoro-5-nitrobenzoic acid 2-amino-4-fluoro-5-nitrobenzoic acid 1194097-41-0 C7H5FN2O4
Alogliptin benzoate impurity K Alogliptin benzoate impurity K 1618644-32-8 C25H25N5O3
Belinostat Z-isomer Belinostat Z-isomer 1884227-58-0 C15H14N2O4S
Canagliflozin Impurity 13 Canagliflozin Impurity 13
Carfilzomib Impurity 1 Carfilzomib Impurity 1
Dapagliflozin Impurity 14 Dapagliflozin Impurity 14 2271248-78-1 C21H25ClO6
Ibrutinib Impurity 13 Ibrutinib Impurity 13
Linagliptin Impurity 26 Linagliptin Impurity 26 2446799-71-7 C20H17BrN6O2
Nintedanib Impurity 13 (Intedanib Impurity 13) Nintedanib Impurity 13 (Intedanib Impurity 13)
vildagliptin Impurity E vildagliptin Impurity E 1789703-37-2 C17H25N3O2
Sitagliptin Impurity 1 Sitagliptin Impurity 1 823817-55-6 C16H15F6N5O
Niraparib metabolite M1 Niraparib metabolite M1 1476777-06-6 C19H19N3O2
Amlodipine Impurity 16 Amlodipine Impurity 16 C26H31ClN2O8S
Edoxaban Impurity 11 (1R,2R,4S) Edoxaban Impurity 11 (1R,2R,4S) 480451-98-7 C21H30ClN5O5
Rivaroxaban Impurity 25 Rivaroxaban Impurity 25 931117-61-2 C19H21Cl2N3O6S
(R)-CITALOPRAM R-(+)-1-3-(dimethyl-amino) propyl-1-(p-fluorophenyl)-5-phthalancarbonitrile (R)-CITALOPRAM R-(+)-1-3-(dimethyl-amino) propyl-1-(p-fluorophenyl)-5-phthalancarbonitrile
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