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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Diquafosol Impurity 13 Diquafosol Impurity 13 211448-81-6 C18H28N4O29P6
Montelukast Sodium EP Impurity G Montelukast Sodium EP Impurity G 1428448-96-7 C35H37ClNNaO3S
Amifostine related impurities 2 Amifostine related impurities 2 17002-55-0 C8H21N3O
Oxacillin Impurity F Oxacillin Impurity F 5053-35-0 C19H19N3O4S2
Peramivir Impurity 30 Peramivir Impurity 30 2758048-79-0 C20H36N2O6
NICERGOLINE IMP. D (EP): 5-BROMOPYRIDINE-3-CARBOXYLIC ACID NICERGOLINE IMP. D (EP): 5-BROMOPYRIDINE-3-CARBOXYLIC ACID
AMOXICILLIN TRIHYDRATE IMP. D (EP) AS SODIUM SALT:(4S)-2-[[[(2R)-2-AMINO-2-(4-HYDROXYPHENYL)ACETYL]AMINO]-CARBOXYMETHYL]-5,5-DIMETHYLTHIAZOLIDINE-4-CARBOXYLIC ACID SODIUM SALT (PENICILLOICACIDS OF AMO AMOXICILLIN TRIHYDRATE IMP. D (EP) AS SODIUM SALT:(4S)-2-[[[(2R)-2-AMINO-2-(4-HYDROXYPHENYL)ACETYL]AMINO]-CARBOXYMETHYL]-5,5-DIMETHYLTHIAZOLIDINE-4-CARBOXYLIC ACID SODIUM SALT (PENICILLOICACIDS OF AMO 1642629-94-4 C16H21N3O6S
4-CHLORO-6-(2-CHLORO-ETHOXY)-7-(2-METHOXY-ETHOXY)-QUINAZOLINE 4-CHLORO-6-(2-CHLORO-ETHOXY)-7-(2-METHOXY-ETHOXY)-QUINAZOLINE 183322-19-2 C13H14Cl2N2O3
2-PIPERAZINE-4-AMINO-6,7-DIMETHOXY QUINOLINE HYDROCHLORIDE 2-PIPERAZINE-4-AMINO-6,7-DIMETHOXY QUINOLINE HYDROCHLORIDE 84050-22-6 C14H20ClN5O2
2-CHLORO-N-(2,3-DIMETHYL-PHENYL)-ACETAMIDE 2-CHLORO-N-(2,3-DIMETHYL-PHENYL)-ACETAMIDE 2564-07-0 C10H12ClNO
1,4-dihydro-2,6-dimethyl-4-(3'-nitrophenyl)-pyridine-3,5-dicarboxylic acid monoisopropyl ester 1,4-dihydro-2,6-dimethyl-4-(3'-nitrophenyl)-pyridine-3,5-dicarboxylic acid monoisopropyl ester 116983-17-6 C18H20N2O6
Cabozantinib impurity 37 Cabozantinib impurity 37
4-(1-bromoethyl)-6-(1-(6-chloro-5-fluoropyrimidin-4-yl)ethyl)-5-fluoropyrimidine 4-(1-bromoethyl)-6-(1-(6-chloro-5-fluoropyrimidin-4-yl)ethyl)-5-fluoropyrimidine
ethyl 6-bromo-4,7-bis((dimethylamino)methyl)-5-hydroxy-1-methyl-2-((phenylthio)methyl)-1H-indole-3-carboxylate ethyl 6-bromo-4,7-bis((dimethylamino)methyl)-5-hydroxy-1-methyl-2-((phenylthio)methyl)-1H-indole-3-carboxylate
Dapoxetine impurity 53 Dapoxetine impurity 53
Dapoxetine impurity 70 Dapoxetine impurity 70
Bosutinib Impurity 38 Bosutinib Impurity 38 2095306-26-4 C46H44Cl4N8O6
(2RS)-2-(4-ETHYLPHENYL)PROPANOIC ACID (2RS)-2-(4-ETHYLPHENYL)PROPANOIC ACID 3585-52-2 C11H14O2
2-Thiopheneacetic acid, α-hydroxy-α-2-thienyl-, (3R)-1-azabicyclo[2.2.2]oct-3-yl ester 2-Thiopheneacetic acid, α-hydroxy-α-2-thienyl-, (3R)-1-azabicyclo[2.2.2]oct-3-yl ester 320347-97-5 C17H19NO3S2
4,4′-DIPHENOQUINONE (DQ) 4,4′-DIPHENOQUINONE (DQ) 494-72-4 C12H8O2
S-(+)-O-DESMETHYL VENLAFAXINE S-(+)-O-DESMETHYL VENLAFAXINE 142761-12-4 C16H25NO2
ACETYLSIMVASTATIN ACETYLSIMVASTATIN 145576-25-6 C27H40O6
5-[2-(4'-METHYLBIPHENYL)]TETRAZOLE 5-[2-(4'-METHYLBIPHENYL)]TETRAZOLE 120568-11-8 C14H12N4
L-2-Aminobutanamide L-2-Aminobutanamide 7324-11-0 C4H10N2O
AMIKACIN IMPURITY A AMIKACIN IMPURITY A
FUROSEMIDE IMPURITY A FUROSEMIDE IMPURITY A C12H11ClN2O5S
GLICLAZIDE IMPURITY F GLICLAZIDE IMPURITY F
ONDANSETRON IMPURITY D ONDANSETRON IMPURITY D
PERINDOPRIL IMPURITY A PERINDOPRIL IMPURITY A
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
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
Mosapride Citric Amide Mosapride Citric Amide 1215825-20-9 C27H31ClFN3O9
Ribavirin Related Compound A (15 mg) (1-beta-D-ribofuranosyl-1H-1,2,4-triazole-3-carboxylic acid) Ribavirin Related Compound A (15 mg) (1-beta-D-ribofuranosyl-1H-1,2,4-triazole-3-carboxylic acid) 39925-19-4 C8H11N3O6
3-(3-TRIFLUOROMETHYL-PHENYL)-PROPYLAMINE 3-(3-TRIFLUOROMETHYL-PHENYL)-PROPYLAMINE 104774-87-0 C10H12F3N
4-(3,4-Dichloro-phenyl)-3,4-dihydro-2H-naphthalen-1-one 4-(3,4-Dichloro-phenyl)-3,4-dihydro-2H-naphthalen-1-one 124379-29-9 C16H12Cl2O
(4-(2-(azepan-1-yl)ethoxy)phenyl)Methanol (4-(2-(azepan-1-yl)ethoxy)phenyl)Methanol 223251-16-9 C15H23NO2
4-HYDROXY PROPOFOL 4-HYDROXY PROPOFOL 1988-10-9 C12H18O2
(1R,2R)-2-(3,4-difluorophenyl)cyclopropanecarboxylic acid (1R,2R)-2-(3,4-difluorophenyl)cyclopropanecarboxylic acid 220352-36-3 C10H8F2O2
benzbroMarone iMpurity benzbroMarone iMpurity
Dasatinib iMpurity Dasatinib iMpurity 1184919-23-0 C22H27N7O2S
eszopiclone iMpurity eszopiclone iMpurity
IMidafenacin iMpurity IMidafenacin iMpurity 503599-41-5 C18H20N2O2
latanoprost iMpurity latanoprost iMpurity 733036-95-8 C25H35FO5
Irbesartan IMpurity D Irbesartan IMpurity D C25H28N6O
Ondansetron HCl IMpurity-G Ondansetron HCl IMpurity-G 99614-03-6 C17H17N3O
lithiuM 2-(4-(Methylsulfonyl)phenyl)acetate lithiuM 2-(4-(Methylsulfonyl)phenyl)acetate 1421227-96-4 C9H11LiO4S
Anastrozole IMpurity (3-(1-Cyano-1-Methylethyl)-alfa,alfa-diMethyl-5-(1H-,1,2,4-triazole-1-ylMethyl)-benzeneacetaMide) Anastrozole IMpurity (3-(1-Cyano-1-Methylethyl)-alfa,alfa-diMethyl-5-(1H-,1,2,4-triazole-1-ylMethyl)-benzeneacetaMide) 120512-03-0 C17H21N5O
AtracuriuM IMpurity I (Mixture of cis, trans(I1), cis, cis(I2), tans, trans IsoMer) AtracuriuM IMpurity I (Mixture of cis, trans(I1), cis, cis(I2), tans, trans IsoMer)
(S)-3-Methyl-1-(2-piperidin-1-ylphenyl)butylamine (S)-3-Methyl-1-(2-piperidin-1-ylphenyl)butylamine 147769-93-5 C16H26N2
Dihydro-Simvastatin Dihydro-Simvastatin 92083-03-9 C25H40O5
Ceftriaxone Sodium impurity 3 Ceftriaxone Sodium impurity 3
Sugammadex sodium Monoiodo Impurity Sugammadex sodium Monoiodo Impurity
(3S,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-1-methyl-4-phenylpiperidine (3S,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-1-methyl-4-phenylpiperidine C20H23NO3
Avatrombopag Impurity 22 Avatrombopag Impurity 22 570403-14-4 C31H38Cl2N6O3S2
176760-99-9 176760-99-9 176760-99-9 C17H13FN2O4
NILOTINIB IMPURITY 17 NILOTINIB IMPURITY 17 851137-91-2 C17H15N5O
DexMedetoMidine IMpurity 16 DexMedetoMidine IMpurity 16
Canagliflozin Impurity 2 Canagliflozin Impurity 2
Rivaroxaban Impurity 22 Rivaroxaban Impurity 22
Levofloxacin Impurity 5 Levofloxacin Impurity 5 2206360-62-3 C13H10FNO5
Ezetimibe Impurity 33 Ezetimibe Impurity 33
Ezetimibe-28 Ezetimibe-28 1478663-95-4 C44H52F2N2O6Si
Vonoprazan Impurity U4 Vonoprazan Impurity U4
Emtricitabine Impurity 28 Emtricitabine Impurity 28 1238210-14-4 C8H11N3O4S
Parecoxib SodiuM iMpurity 37 Parecoxib SodiuM iMpurity 37
(3R,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)-1-methylpiperidine compound (3R,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)-1-methylpiperidine compound 105834-21-7 C20H22FNO3
Apixaban Impurity BMS-A Apixaban Impurity BMS-A
Afatinib Impurity 70 Afatinib Impurity 70 125781-04-6 C4H7ClO2
Apixaban impurity 14/6-(4-aminophenyl)-1-(4-methoxyphenyl)-7-oxo-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxylic acid Apixaban impurity 14/6-(4-aminophenyl)-1-(4-methoxyphenyl)-7-oxo-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxylic acid 1704504-93-7 C20H18N4O4
Cabozantinib Impurity 46 Cabozantinib Impurity 46 1247859-37-5 C11H10FNO3
Ivabradine Impurity S33172 Ivabradine Impurity S33172 2247881-26-9 C26H34N2O5
Tenofovir Impurity 71 Tenofovir Impurity 71
2-(chloromethyl)-3-methylpyridin-4-ol 2-(chloromethyl)-3-methylpyridin-4-ol 1805648-51-4 C7H8ClNO
Mupirocin Calcium EP Impurity I Mupirocin Calcium EP Impurity I C26H44CaO9
Benzenepropanoic acid, α-hydroxy-β-[[(3E)-1-oxo-3-hexen-1-yl]amino]-, (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-6,12b-bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl ester, (αR,βS)- Benzenepropanoic acid, α-hydroxy-β-[[(3E)-1-oxo-3-hexen-1-yl]amino]-, (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-6,12b-bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl ester, (αR,βS)- 2243233-98-7 C46H55NO14
D-erythro-Hexonic acid, 2,4-dideoxy-3,5-O-(1-methylethylidene)-6-S-(5-methyl-1,3,4-thiadiazol-2-yl)-6-thio-, 1,1-dimethylethyl ester D-erythro-Hexonic acid, 2,4-dideoxy-3,5-O-(1-methylethylidene)-6-S-(5-methyl-1,3,4-thiadiazol-2-yl)-6-thio-, 1,1-dimethylethyl ester 1326303-05-2 C16H26N2O4S2
L-Leucine, N-[(2S)-2-amino-1-oxo-4-phenylbutyl]- L-Leucine, N-[(2S)-2-amino-1-oxo-4-phenylbutyl]- 290298-02-1 C16H24N2O3
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