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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
8-chloro-11-(1-((5-methylpyridin-3-yl)methyl)piperidin-4-yl)-11H-benzo[5,6]cyclohepta[1,2-b]pyridine 8-chloro-11-(1-((5-methylpyridin-3-yl)methyl)piperidin-4-yl)-11H-benzo[5,6]cyclohepta[1,2-b]pyridine
Bumetanide Photodegradable Impurity 16 Bumetanide Photodegradable Impurity 16
Bisoprolol Impurity 47 Bisoprolol Impurity 47
Gadobutrol Impurity 11(Ammonium salt) Gadobutrol Impurity 11(Ammonium salt)
Flomoxef Impurity F Flomoxef Impurity F
Tegoprazan Impurity 15 Tegoprazan Impurity 15
Nirmatrelvir Impurity 8 Nirmatrelvir Impurity 8
Nirmatrelvir Impurity 2 Nirmatrelvir Impurity 2
(5-(2-fluorophenyl)-1H-pyrrol-3-yl)methanamine hydrochloride (5-(2-fluorophenyl)-1H-pyrrol-3-yl)methanamine hydrochloride
Rocuronium Bromide Impurity 24 、25 Rocuronium Bromide Impurity 24 、25
decyl D-glucoside decyl D-glucoside 54549-25-6 C16H32O6
3-(((2R,3S)-2-((R)-1-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(3-fluorophenyl)morpholino)methyl)-1H-1,2,4-triazol-5(4H)-one 3-(((2R,3S)-2-((R)-1-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(3-fluorophenyl)morpholino)methyl)-1H-1,2,4-triazol-5(4H)-one
1-benzyl-4-phenylpiperidin-4-ol 1-benzyl-4-phenylpiperidin-4-ol 63843-83-4 C18H21NO
[(±)-(4-amino-2-hydroxy-4-oxobutyl)trimethylammonium] chloride [(±)-(4-amino-2-hydroxy-4-oxobutyl)trimethylammonium] chloride 5261-99-4 C7H18ClN2O2+
(S,R)-Palonosetron N-Oxide (S,R)-Palonosetron N-Oxide C19H24N2O2
17,21-dihydroxy-16beta-methylpregna-1,4,9(11)-triene-3,20-dione 17,21-dihydroxy-16beta-methylpregna-1,4,9(11)-triene-3,20-dione 13504-15-9 C22H28O4
Sulfamide, N-[6-[2-[(5-bromo-2-pyrimidinyl)oxy]ethoxy]-5-phenyl-4-pyrimidinyl]-N'-propyl- Sulfamide, N-[6-[2-[(5-bromo-2-pyrimidinyl)oxy]ethoxy]-5-phenyl-4-pyrimidinyl]-N'-propyl- 2300968-87-8 C19H21BrN6O4S
Benzeneacetonitrile, 4-(4-chloro-1-oxobutyl)-α,α-dimethyl- Benzeneacetonitrile, 4-(4-chloro-1-oxobutyl)-α,α-dimethyl- 169032-17-1 C14H16ClNO
5-BroModescyano CitalopraM 5-BroModescyano CitalopraM 64169-39-7 C19H21BrFNO
Aripiprazole N,N-Dioxide Aripiprazole N,N-Dioxide 573691-13-1 C23H27Cl2N3O4
Deschloro Cetirizine Dihydrochloride Deschloro Cetirizine Dihydrochloride 83881-54-3 C21H26N2O3
DesvancosaMinyl VancoMycin DesvancosaMinyl VancoMycin 101485-50-1 C59H62Cl2N8O22
rac N-Desbutyroyl Acebutolol rac N-Desbutyroyl Acebutolol 57898-80-3 C14H22N2O3
rac-Clopidogrel-MP Endo Derivative rac-Clopidogrel-MP Endo Derivative 1346598-12-6 C25H26ClNO6S
1,1'-N-[Methylenebis(sulphanediylethylene)]bis(N'-Methyl-2-nitroethene-1,1-diaMine 1,1'-N-[Methylenebis(sulphanediylethylene)]bis(N'-Methyl-2-nitroethene-1,1-diaMine 1331637-48-9 C11H22N6O4S2
ent-LaMivudine ent-LaMivudine 134680-32-3 C8H11N3O3S
Formoterol O-β-D-Glucuronide Formoterol O-β-D-Glucuronide 615551-59-2 C25H32N2O10
fenofibrate iMpurity fenofibrate iMpurity
6,11-Di-O-Methyl ErythroMycin 6,11-Di-O-Methyl ErythroMycin 81103-14-2 C39H71NO13
ent-OseltaMivir Phosphate ent-OseltaMivir Phosphate 1035895-89-6 C16H29N2O8P
3,5,3',5'-Tetraiodo Thyrolactic Acid 3,5,3',5'-Tetraiodo Thyrolactic Acid 7069-47-8 C15H10I4O5
3-cyano-4-isobutoxybenzaMide 3-cyano-4-isobutoxybenzaMide 161718-85-0 C12H14N2O2
Caffeidinecarboxylic acid Caffeidinecarboxylic acid 54536-15-1 C8H12N4O3
1-Keto BaMbuterol 1-Keto BaMbuterol 112935-94-1 C18H27N3O5
7-Chloro-4-(4-hydroxyanilino)quinoline 7-Chloro-4-(4-hydroxyanilino)quinoline 81099-86-7 C15H11ClN2O
Desfluoro EzetiMibe Desfluoro EzetiMibe 302781-98-2 C24H22FNO3
5-(2-Bromo-1-oxobutyl)-8-hydroxy-2(1H)-quinolinone 5-(2-Bromo-1-oxobutyl)-8-hydroxy-2(1H)-quinolinone 59827-93-9 C13H12BrNO3
Oseltamivir Impurity 103 Oseltamivir Impurity 103
Oseltamivir Impurity 101 Oseltamivir Impurity 101
Oseltamivir Impurity 90 Oseltamivir Impurity 90
Oseltamivir Impurity 79 Oseltamivir Impurity 79
Oseltamivir Impurity 73 Oseltamivir Impurity 73
Oseltamivir Impurity 69 Oseltamivir Impurity 69
10-methoxy-6-methylergoline-8beta-methanol 10-methoxy-6-methylergoline-8beta-methanol 35121-60-9 C17H22N2O2
INDEX NAME NOT YET ASSIGNED INDEX NAME NOT YET ASSIGNED 2514957-39-0 C16H16FN3O4
Propanoic acid, 2,2-dimethyl-, 4-[[[2-[[(2-methoxy-2-oxoethyl)amino]carbonyl]phenyl]amino]sulfonyl]phenyl ester Propanoic acid, 2,2-dimethyl-, 4-[[[2-[[(2-methoxy-2-oxoethyl)amino]carbonyl]phenyl]amino]sulfonyl]phenyl ester 127373-95-9 C21H24N2O7S
Fulvestrant Impurity 1 Fulvestrant Impurity 1
CefazolinH020-02-I-02 CefazolinH020-02-I-02
(E)-3-[cyano(2,3-dichlorophenyl)methylene]carbazamidine (E)-3-[cyano(2,3-dichlorophenyl)methylene]carbazamidine 94213-24-8 C9H7Cl2N5
5-Pyrimidinecarboxylic acid, 4-amino-6-[1-[(1R)-2-cyano-1-cyclopentylethyl]-1H-pyrazol-4-yl]- 5-Pyrimidinecarboxylic acid, 4-amino-6-[1-[(1R)-2-cyano-1-cyclopentylethyl]-1H-pyrazol-4-yl]- 2606144-44-7 C16H18N6O2
3-Quinolinecarboxylic acid, 7-[(4aS,7aS)-1-acetyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-1-cyclopropyl-6-fluoro-1,4-dihydro-8-methoxy-4-oxo- 3-Quinolinecarboxylic acid, 7-[(4aS,7aS)-1-acetyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-1-cyclopropyl-6-fluoro-1,4-dihydro-8-methoxy-4-oxo- 1395471-26-7 C23H26FN3O5
(1S,5R)-9-(4-fluorophenyl)-11-isopropyl-10-phenyl-1,2,6,7-tetrahydro-3H,5H-1,5-methanopyrrolo[1,2-e][1,5]oxazonin-3-one (1S,5R)-9-(4-fluorophenyl)-11-isopropyl-10-phenyl-1,2,6,7-tetrahydro-3H,5H-1,5-methanopyrrolo[1,2-e][1,5]oxazonin-3-one
N-[3-acetyl-4-(oxiranylmethoxy)phenyl]butyramide N-[3-acetyl-4-(oxiranylmethoxy)phenyl]butyramide 28197-66-2 C15H19NO4
8-isopropyl-8-azabicyclo[3.2.1]octan-3-one 8-isopropyl-8-azabicyclo[3.2.1]octan-3-one 3423-28-7 C10H17NO
4-(2,3-DIMETHYL-BENZYL)-1H-IMIDAZOLE HCL H2O 4-(2,3-DIMETHYL-BENZYL)-1H-IMIDAZOLE HCL H2O 90038-00-9 C12H17ClN2O
(2S,3S,5S)-2-Hexyl-3,5-dihydroxyhexadecanoic Acid (2S,3S,5S)-2-Hexyl-3,5-dihydroxyhexadecanoic Acid 130793-30-5 C22H44O4
(1,2,4-Triazol-4-yl) Itraconazole (1,2,4-Triazol-4-yl) Itraconazole 854372-77-3 C35H38Cl2N8O4
6,7,8,9-Tetrahydro Carvedilol 6,7,8,9-Tetrahydro Carvedilol 1246820-73-4 C24H30N2O4
Cefdinir Lactone Cefdinir Lactone 946573-41-7 C14H13N5O5S2
Ozagrel methylester Ozagrel methylester 866157-50-8 C13H12N2O2
2-Propanol, 1-[2-(2-methoxyethyl)phenoxy]-3-[(1-methylethyl)amino]- 2-Propanol, 1-[2-(2-methoxyethyl)phenoxy]-3-[(1-methylethyl)amino]- 163685-38-9 C15H25NO3
2-aMino-3-Methyl-3-sulfino-4-(1H-1,2,3-triazol-1-yl)butyric acid 2-aMino-3-Methyl-3-sulfino-4-(1H-1,2,3-triazol-1-yl)butyric acid 118175-11-4 C7H12N4O4S
1,4,8,11-Tetraazacy clotetradecance, 1,4,8-tris[(4 Methylphenyl)sufonyl]- 1,4,8,11-Tetraazacy clotetradecance, 1,4,8-tris[(4 Methylphenyl)sufonyl]- 104395-69-9 C31H42N4O6S3
(1S)-N-(3S)-1-Azabicyclo[2.2.2]oct-3-yl-1,2,3,4-tetrahydro-1-naphthalenecarboxaMide (1S)-N-(3S)-1-Azabicyclo[2.2.2]oct-3-yl-1,2,3,4-tetrahydro-1-naphthalenecarboxaMide 177793-79-2 C18H24N2O
(E)-Ceftriaxone (E)-Ceftriaxone 92143-31-2 C18H18N8O7S3
(Z)-Cinnarizine (Z)-Cinnarizine 750512-44-8 C26H28N2
Mono-POC Tenofovir 6-Isopropyl CarbaMate Mono-POC Tenofovir 6-Isopropyl CarbaMate 1244022-56-7 C18H28N5O9P
N-Methyl Iso Desloratadine N-Methyl Iso Desloratadine 183198-48-3 C20H21ClN2
Tartaric Acid Isopropyl Ester Tartaric Acid Isopropyl Ester 116601-09-3 C7H12O6
Vardenafil Acetyl Analogue Vardenafil Acetyl Analogue 1261351-28-3 C25H34N6O3
N1-Methylbenzene-1,2,4-triaMine N1-Methylbenzene-1,2,4-triaMine 60651-29-8 C7H11N3
RocuroniuMbroMide iMpurity H RocuroniuMbroMide iMpurity H
1-[(2'-carbaMoylbiphenyl-4-yl) Methyl]-2-ethoxybenziMidazole-7-carboxylic acid 1-[(2'-carbaMoylbiphenyl-4-yl) Methyl]-2-ethoxybenziMidazole-7-carboxylic acid 1696392-11-6 C24H21N3O4
5-chloro-1-(3-diMethylaMinopropyl)-1-(4-fluorophenyl)-phthalan 5-chloro-1-(3-diMethylaMinopropyl)-1-(4-fluorophenyl)-phthalan 64169-45-5 C19H21ClFNO
dextroMethorphanone dextroMethorphanone
oxiracetaM related substance ISF3886 oxiracetaM related substance ISF3886 120428-80-0 C8H13N3O4
Carvedilol IMpurity D Carvedilol IMpurity D 1391052-16-6 C39H39N3O6
DL-2-(4-Carboxyphenyl)propionic Acid DL-2-(4-Carboxyphenyl)propionic Acid 67381-50-4 C10H10O4
Betamethasone 17-Propionate 21-Mesylate Betamethasone 17-Propionate 21-Mesylate 15423-80-0 C26H35FO8S
ClarithroMycin EP IMpurity F ClarithroMycin EP IMpurity F 128940-83-0 C39H71NO13
3(R)-Hydroperoxy Simvastatin 3(R)-Hydroperoxy Simvastatin 1092716-42-1 C25H38O7
Albendazole EP IMpurity F Albendazole EP IMpurity F 80983-45-5 C10H11N3O2S
10-Dehydrobaccatin V 10-Dehydrobaccatin V 151636-94-1 C29H34O10
DoxylaMine EP IMpurity A DoxylaMine EP IMpurity A 873407-01-3 C17H22N2O
((1R,3R,E)-5-((E)-2-((1R,3aS,7aR)-1-((2R,5R,E)-5,6-diMethylhept-3-en-2-yl)-7a-Methyldihydro-1H-inden-4(2H,5H,6H,7H,7aH)-ylidene)ethylidene)-4-Methylenecyclohexane-1,3-diyl)bis(oxy)bis(tert-butyldiMethylsilane) ((1R,3R,E)-5-((E)-2-((1R,3aS,7aR)-1-((2R,5R,E)-5,6-diMethylhept-3-en-2-yl)-7a-Methyldihydro-1H-inden-4(2H,5H,6H,7H,7aH)-ylidene)ethylidene)-4-Methylenecyclohexane-1,3-diyl)bis(oxy)bis(tert-butyldiMethylsilane) 115540-28-8 C40H72O2Si2
Clopidogrel EP IMpurity D Clopidogrel EP IMpurity D 1421283-60-4 C24H21Cl2NO4S
Loratadine IMpurity E Loratadine IMpurity E C22H23ClN2O2
Metoprolol IMpurity E Metoprolol IMpurity E C15H25NO3
IMp. A (EP): 4-Methyl-6-(1-Methyl-1H-benziMidazol-2-yl)-2-propyl-1H-benziMidazole IMp. A (EP): 4-Methyl-6-(1-Methyl-1H-benziMidazol-2-yl)-2-propyl-1H-benziMidazole
(2S,4S)-4-[4-(3-Methyl-1-phenyl-1H-pyrazol-5-yl)-1-piperazinyl]-2-(3-thiazolidinylcarbonyl)-1-pyrrolidinecarboxylic acid tert-butyl ester (2S,4S)-4-[4-(3-Methyl-1-phenyl-1H-pyrazol-5-yl)-1-piperazinyl]-2-(3-thiazolidinylcarbonyl)-1-pyrrolidinecarboxylic acid tert-butyl ester 401566-80-1 C27H38N6O3S
4-Methoxy-5-(3-Morpholinopropoxy)-2-nitrobenzaMide 4-Methoxy-5-(3-Morpholinopropoxy)-2-nitrobenzaMide 861453-16-9 C15H21N3O6
5-chloro-3-sulfo-2-Thiophenecarboxylic acid 5-chloro-3-sulfo-2-Thiophenecarboxylic acid 187746-94-7 C5H3ClO5S2
2,2'-(4,4'-(3,3'-(isopropylazanediyl)bis(2-hydroxypropane-3,1-diyl))bis(oxy)bis(4,1-phenylene))diacetaMide 2,2'-(4,4'-(3,3'-(isopropylazanediyl)bis(2-hydroxypropane-3,1-diyl))bis(oxy)bis(4,1-phenylene))diacetaMide 87619-83-8 C25H35N3O6
3,3'-diMethyl-1,1'-diphenyl-1H,1'H-4,4'-bipyrazole-5,5'-diol 3,3'-diMethyl-1,1'-diphenyl-1H,1'H-4,4'-bipyrazole-5,5'-diol 177415-76-8 C20H18N4O2
5-(2-cyclopropyl-1-(3-fluorophenyl)-2-oxoethyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridin-2-yl acetate 5-(2-cyclopropyl-1-(3-fluorophenyl)-2-oxoethyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridin-2-yl acetate 1391194-39-0 C20H20FNO3S
(S)-N-(1-(3-MethylbutanaMido)-1-oxo-3-phenylpropan-2-yl)pyrazine-2-carboxaMide (S)-N-(1-(3-MethylbutanaMido)-1-oxo-3-phenylpropan-2-yl)pyrazine-2-carboxaMide 862894-96-0 C19H22N4O3
Ticagrelor iMpurity Ticagrelor iMpurity 1882095-51-3 C27H45N5O8S
cefaclor iMpurity G cefaclor iMpurity G 67308-21-8 C16H17N3O4S
Rupatadine iMpurity E Rupatadine iMpurity E
Tadalafil iMpurity D Tadalafil iMpurity D 951661-81-7 C22H20ClN3O4
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