Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Tolvaptan Impurity 7 Tolvaptan Impurity 7 1432725-23-9 C26H26N2O3
Dexchlorpheniramine impurity E Dexchlorpheniramine impurity E
Diquafosol Impurity F Diquafosol Impurity F
Dasatinib iMpurity F Dasatinib iMpurity F
Palbociclib Impurity 2 Palbociclib Impurity 2
Axitinib Impurity 6 Axitinib Impurity 6
Levofloxacin Impurity 16 Levofloxacin Impurity 16 C18H20FN3O4
Venlafaxine Impurity 13 Venlafaxine Impurity 13 727728-51-0 C17H27NO2
Erlotinib Impurity 20 Erlotinib Impurity 20
Febuxostat Impurity 42 Febuxostat Impurity 42
Pregabalin Impurity 11 Pregabalin Impurity 11 2375259-86-0 C8H16ClNO2
Ticagrelor Impurity 44 Ticagrelor Impurity 44
Exemestane Impurity 2 Exemestane Impurity 2
Empagliflozin Impurity 4 Empagliflozin Impurity 4
Moxifloxacin Impurity 14 Moxifloxacin Impurity 14
2-Benzothiazolamine 2-Benzothiazolamine
Cefodizime Impurity E Cefodizime Impurity E
Penicillin Impurity C Penicillin Impurity C
Cefminox Sodium impurity C Cefminox Sodium impurity C
Cefotiam Impurity C Cefotiam Impurity C
Dequalinium EP Impurity B Dequalinium EP Impurity B 747387-02-6 C30H40N4+2
Peramivir Impurity F Peramivir Impurity F
Lincomycin sulfoxide Impurity 4 Lincomycin sulfoxide Impurity 4
Sulpiride Impurity 3 Sulpiride Impurity 3
Doxofylline iMpurity F Doxofylline iMpurity F
He pulls non-EP impurities D He pulls non-EP impurities D
R-(-)-O-DESMETHYLVENLAFAXINE R-(-)-O-DESMETHYLVENLAFAXINE 142761-11-3 C16H25NO2
3-Anilino-2-(3,4,5-triMethoxybenzyl)acrylonitrile, (Mixture of cis/trans isoMers) 3-Anilino-2-(3,4,5-triMethoxybenzyl)acrylonitrile, (Mixture of cis/trans isoMers) 30078-48-9 C19H20N2O3
Anastrozole EP Impurity I Anastrozole EP Impurity I 120511-91-3 C15H17ClN2
Anastrozole EP Impurity I Anastrozole EP Impurity I 120511-91-3 C15H17ClN2
(2R,5S)-5-(3,4-Dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-1,3-oxathiolane-2-carboxylic Acid  (1R,2S,5R)-5-Methyl-2-(1-methylethyl)cyclohexyl Ester (2R,5S)-5-(3,4-Dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-1,3-oxathiolane-2-carboxylic Acid (1R,2S,5R)-5-Methyl-2-(1-methylethyl)cyclohexyl Ester 389128-28-3 C18H26N2O5S
Everolimus impurity F Everolimus impurity F
Ceftriaxone Sodium impurity 4 Ceftriaxone Sodium impurity 4
Sugammadex sodium Hepta-Iodine Impurity Sugammadex sodium Hepta-Iodine Impurity
Abitrone project impurity Abitrone project impurity
105981-34-8 105981-34-8 105981-34-8 C15H22N4S
1364671-52-2 1364671-52-2 1364671-52-2 C19H19ClN6O3S
1627504-43-1 1627504-43-1 1627504-43-1 C14H14ClN7
Pramipexole Impurity Q Pramipexole Impurity Q
Aprepitant Impurity 42 Aprepitant Impurity 42 172678-47-6 C20H18F7NO2
Efinaconazole Related Impurity 13 Efinaconazole Related Impurity 13 2055912-03-1 C24H32FN5O
DexMedetoMidine IMpurity 17 DexMedetoMidine IMpurity 17
Sofosbuvir IMpurity 21 Sofosbuvir IMpurity 21 2138483-01-7 C17H17FN2O6
Moxifloxacin Impurity 1 Moxifloxacin Impurity 1
Moxifloxacin Impurity 22 Moxifloxacin Impurity 22
Linagliptin Impurity F Linagliptin Impurity F
Trelagliptin Impurity 4 Trelagliptin Impurity 4
Fudosteine Impurity 1 Fudosteine Impurity 1
Sugammadex Impurity 17 Sugammadex Impurity 17 2414905-36-3 C82H120NaO48PS7
Apixaban Impurity 28 Apixaban Impurity 28 2208275-54-9
Fluvastatin EP Impurity E Fluvastatin EP Impurity E C24H26FNO4
Oseltamivir Impurity 24 Oseltamivir Impurity 24
(3S,3'S,4R,4'R)-diphenyl 3,3'-(oxybis(methylene))bis(4-(4- fluorophenyl)piperidine-1-carboxylate) (3S,3'S,4R,4'R)-diphenyl 3,3'-(oxybis(methylene))bis(4-(4- fluorophenyl)piperidine-1-carboxylate) C38H38F2N2O5
Nettopitan impurity Nettopitan impurity
(Z)-methyl 3-(hydroxy(phenyl)methylene)-2-oxoindoline-6-carboxylate (Z)-methyl 3-(hydroxy(phenyl)methylene)-2-oxoindoline-6-carboxylate 2093243-16-2 C17H13NO4
Abacavir Impurity F Abacavir Impurity F 1443421-68-8 C18H26N6O
Lenvatinib Impurity 10 Lenvatinib Impurity 10
Nifuratel Impurity 10 Nifuratel Impurity 10
Ozagrel Impurity 16 Ozagrel Impurity 16 143945-86-2 C13H12N2O2
Afatinib Impurity 74 Afatinib Impurity 74 1259015-90-1 C7H13NO2
Afatinib Impurity 74 Afatinib Impurity 74 1259015-90-1 C7H13NO2
Afatinib Impurity 78 Afatinib Impurity 78
Afatinib Impurity 78 Afatinib Impurity 78
Cabozantinib Impurity 47 Cabozantinib Impurity 47 113136-79-1 C11H10ClNO3
Landiolol impurity Q Landiolol impurity Q
Tenofovir Impurity 72 Tenofovir Impurity 72
Medetomidine Impurity 52 Medetomidine Impurity 52 128366-51-8 C13H14N2O2
1,2-Benzenediol, 4-(1-hydroxyethyl)- 1,2-Benzenediol, 4-(1-hydroxyethyl)- 37491-94-4 C8H10O3
Acetamide, 2-(diethylamino)-N-(3,4-dimethylphenyl)- Acetamide, 2-(diethylamino)-N-(3,4-dimethylphenyl)- 3213-16-9 C14H22N2O
(trans)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4'-fluoro-[1,1'- biphenyl]-4-yl)piperidine (trans)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4'-fluoro-[1,1'- biphenyl]-4-yl)piperidine 1217975-87-5 C25H24FNO3
Carboprost Impurity 1 Carboprost Impurity 1
Beraprost Impurity 1 Beraprost Impurity 1
Benzenebutanoic acid, β-amino-2,5-difluoro-, (βR)- Benzenebutanoic acid, β-amino-2,5-difluoro-, (βR)- 936630-56-7 C10H11F2NO2
Cyclopropanecarboxylic acid, 1-[[(2-fluorophenyl)amino]carbonyl]- Cyclopropanecarboxylic acid, 1-[[(2-fluorophenyl)amino]carbonyl]- 918642-61-2 C11H10FNO3
Isavuconazole Impurity 34 Isavuconazole Impurity 34
Org246653-1(RRT0.31) Org246653-1(RRT0.31)
Linagliptin impurity Linagliptin impurity
CEFMETAZOLE IMPURITY CEFMETAZOLE IMPURITY 76952-82-4 C13H16N6O5S3
Acyclovir impurity R Acyclovir impurity R
Ornidazole Impurity 7 Ornidazole Impurity 7 109620-80-6 C6H8ClN3O3
(1R,2S,5aS,6aS,7aR,8aS,10aS) (1R,2S,5aS,6aS,7aR,8aS,10aS)
(E)-8-(3,4-dihydroxystyryl) (E)-8-(3,4-dihydroxystyryl)
N,N'-((2Z,2'Z)-disulfanediylbis N,N'-((2Z,2'Z)-disulfanediylbis
Cabozantinib impurity 1DYH Cabozantinib impurity 1DYH 1621681-63-7 C28H24FN3O6
1-((2R,3R)-3-(2,3-dihydrobenzo[b] 1-((2R,3R)-3-(2,3-dihydrobenzo[b] 2137145-62-9 C23H36N2O5
Tiotropium Bromide Impurity 1 Tiotropium Bromide Impurity 1 2109037-83-2 C18H20ClNO4S2
Dofetilide Impurity A Dofetilide Impurity A
Sugammadex disulfide Impurity Sugammadex disulfide Impurity
Dexmedetomidine Impurity 19 Dexmedetomidine Impurity 19
Voriconazole Impurity 18 Voriconazole Impurity 18 321588-94-7 C22H18ClF4N7O
Remdesivir impurity Remdesivir impurity 1911578-74-9 C12H14N5O7P
ethyl 2-((4R,6R)-6-(2-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4- (phenylcarbamoyl)-1H-pyrrol-1-yl)ethyl)-2,2-dimethyl-1,3-dioxan- 4-yl)acetate ethyl 2-((4R,6R)-6-(2-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4- (phenylcarbamoyl)-1H-pyrrol-1-yl)ethyl)-2,2-dimethyl-1,3-dioxan- 4-yl)acetate 616201-27-5 C38H43FN2O5
Peramivir Impurity 16 Peramivir Impurity 16
Tiotropium bromide Impurity 13 Tiotropium bromide Impurity 13 1459721-06-2 C18H19NO4S2
Anastrozole Impurity I Anastrozole Impurity I
Anastrozole Impurity I Anastrozole Impurity I
Rocuronium bromide diepoxide impurity Rocuronium bromide diepoxide impurity C21H30O4
2-hydroxy-5-((4-oxo-3,4-dihydrophthalazin-1-yl)methyl)benzonitrile 2-hydroxy-5-((4-oxo-3,4-dihydrophthalazin-1-yl)methyl)benzonitrile
Topiroxostat Impurity 39 Topiroxostat Impurity 39
Vonoprazan Impurity 60 Vonoprazan Impurity 60
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