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Pharmaceutical Impurity Reference Standards
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- Chemical Name:Febuxostat Impurity 54
- CAS:
- MF:
- Chemical Name:Silodosin Impurity B
- CAS:
- MF:
- Chemical Name:Cefminox Sodium impurity F
- CAS:
- MF:
- Chemical Name:Clindamycin Impurity F
- CAS:
- MF:
- Chemical Name:Fasudil iMpurity D
- CAS:
- MF:
- Structure:
- Chemical Name: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)acetic acid
- CAS:929540-41-0
- MF:C36H41CaFN2O5
- Chemical Name:Doxofylline iMpurity C
- CAS:
- MF:
- Structure:
- Chemical Name:Puerarin-4'-O-β-D-glucopyranoside
- CAS:117047-08-2
- MF:C27H30O14
- Structure:
- Chemical Name:N-Propyl-7,8-dimethoxy-1,3,4,5-tetrahydro-2H-3-benzazepin-2-one
- CAS:2512208-76-1
- MF:C15H21NO3
- Structure:
- Chemical Name:4-Desmethyl 3-Methyl Vortioxetine Hydrochloride
- CAS:1293343-01-7
- MF:
- Structure:
- Chemical Name:OFLOXACIN N-OXIDE (MIXTURE OF DIASTEREOMERS)
- CAS:104721-52-0
- MF:C18H20FN3O5
- Structure:
- Chemical Name:4-[[2-(2-Amino-4-thiazolyl)acetyl]amino]-benzeneacetic Acid
- CAS:1365244-64-9
- MF:C13H13N3O3S
- Structure:
- Chemical Name:OCTAKIS-6-BROMO-6-DEOXY-GAMMA-CYCLODEXTRIN
- CAS:53784-84-2
- MF:C48H72Br8O32
- Structure:
- Chemical Name:2-Ethynylaniline
- CAS:52670-38-9
- MF:C8H7N
- Structure:
- Chemical Name:Palbociclib Impurity 91
- CAS:571191-15-6
- MF:C22H27N7O2
- Structure:
- Chemical Name:Ibrutinib Impurity 28
- CAS:2213398-75-3
- MF:C18H15N5O
- Structure:
- Chemical Name:Clopidogrel Impurity 60
- CAS:1430373-12-8
- MF:C25H26ClNO6S
- Chemical Name:Ozagrel Impurity F
- CAS:
- MF:
- Structure:
- Chemical Name:Ceftriaxone Sodium impurity 1
- CAS:1214622-93-1
- MF:C10H12N2O5S
- Chemical Name:Lasoprazole impurity
- CAS:
- MF:
- Structure:
- Chemical Name:2-bromo-1-(4-chlorothiophen-2-yl)ethanone
- CAS:677007-73-7
- MF:C6H4BrClOS
- Structure:
- Chemical Name:Fluticasone Impurity 14
- CAS:
- MF:C25H31F3O5S
- Chemical Name:Ritonavir EP Impurity U
- CAS:
- MF:
- Structure:
- Chemical Name:((3R,5S)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenyl carbamoyl)-1H-pyrrol-1-yl)-3,5-dihydroxyheptanoate)calcium(II)
- CAS:
- MF:C66H68CaF2N4O10
- Chemical Name:DexMedetoMidine IMpurity O
- CAS:
- MF:
- Structure:
- Chemical Name:Rivaroxaban Impurity 48
- CAS:1414932-72-1
- MF:C21H20ClN3O4
- Chemical Name:Imatinib Impurity A
- CAS:
- MF:
- Chemical Name:Vonoprazan Impurity 19
- CAS:
- MF:
- Structure:
- Chemical Name:Pregabalin Diacid
- CAS:1788341-42-3
- MF:C16H26N2O
- Chemical Name:Dexamethasone Impurity A
- CAS:
- MF:
- Chemical Name:Olaparib Impurity 24
- CAS:
- MF:
- Chemical Name:Topiroxostat Impurity 6
- CAS:
- MF:
- Chemical Name:Irinotecan EP Impurity H
- CAS:
- MF:
- Chemical Name:Teneligliptin Impurity 4
- CAS:
- MF:
- Chemical Name:Erlotinib Hydrochloride iMpurity 53
- CAS:
- MF:
- Structure:
- Chemical Name:(3R,4S)-phenyl 3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4- fluorophenyl)piperidine-1-carboxylate
- CAS:2389152-22-9
- MF:C26H24FNO5
- Chemical Name:Moxifloxacin EP Impurity K
- CAS:
- MF:
- Chemical Name:Anestagnate
- CAS:
- MF:
- Chemical Name:Trelagliptin IMpurity 33
- CAS:
- MF:
- Structure:
- Chemical Name:Estradiol Impurity 1
- CAS:57780-81-1
- MF:C18H24O4
- Structure:
- Chemical Name:Metoprolol IMpurity L
- CAS:
- MF:C15H25NO3
- Chemical Name:Teneligliptin Impurity 14
- CAS:
- MF:
- Chemical Name:Ampicillin EP Impurity P
- CAS:
- MF:
- Structure:
- Chemical Name:5-Heptenoic acid, 7-[(1R,2R,3R,5S)-2-[(1E)-3,3-difluoro-4-phenoxy-1-buten-1-yl]-3,5-dihydroxycyclopentyl]-, 1-methylethyl ester, (5E)-
- CAS:1563176-58-8
- MF:C25H34F2O5
- Structure:
- Chemical Name:Butanoic acid, 2,2-dimethyl-, (1S,3R,7S,8S,8aR)-1,2,3,7,8,8a-hexahydro-3,7-dimethyl-8-[2-[(2R,4R,5S)-tetrahydro-4-hydroxy-5-methyl-6-oxo-2H-pyran-2-yl]ethyl]-1-naphthalenyl ester
- CAS:477877-98-8
- MF:C26H40O5
- Structure:
- Chemical Name:1H-1,2,4-Triazole-1-ethanol, α-(2,4-difluorophenyl)-α-(1H-1,2,4-triazol-1-ylmethyl)-, 4-oxide
- CAS:1997296-62-4
- MF:C13H12F2N6O2
- Structure:
- Chemical Name:para-Hydroxy L-Milnacipran
- CAS:688738-11-6
- MF:C15H22N2O2
- Chemical Name:Varenicline Impurity 9
- CAS:
- MF:
- Chemical Name:Elagolix Sodium impurity3
- CAS:
- MF:
- Structure:
- Chemical Name:Epinephrine Impurity 4
- CAS:94217-53-5
- MF:C9H13NO3
- Structure:
- Chemical Name:(trans)-4-((2-amino-3,6-dibromobenzyl)amino)cyclohexanol
- CAS:
- MF:C13H18Br2N2O
- Chemical Name:Recombinant N-Acetyl Alpha-D-Glucosaminidase (NAGLU)
- CAS:
- MF:
- Structure:
- Chemical Name:(2R,3R,4R,5R)-2-(4-amino-2-oxo
- CAS:1415316-72-1
- MF:C12H16N4O7
- Structure:
- Chemical Name:(R)-2-(3-(diisopropylamino)-1-phenylpropyl)phenol
- CAS:
- MF:C21H29NO
- Chemical Name:Dexamethasone EP impurities F
- CAS:
- MF:
- Structure:
- Chemical Name:D-Ribofuranose, 1-C-(4-aminopyrrolo[2,1-f][1,2,4]triazin-7-yl)-2,3,5-tris-O-(phenylmethyl)-
- CAS:1355049-94-3
- MF:C32H32N4O5
- Chemical Name:Delamanid Impurity 1
- CAS:
- MF:
- Structure:
- Chemical Name:N-[4-[(6,7-Dimethoxy-4-quinolinyl)oxy]phenyl]-N'-(4-fluoro-3-hydroxyphenyl)-1,1-cyclopropanedicarboxamide
- CAS:1628530-41-5
- MF:C28H24FN3O6
- Chemical Name:Oseltamivir Impurity Mixture (MW:486 Da)
- CAS:
- MF:
- Structure:
- Chemical Name:(R)-Ethyl 3-(bromomethyl)hexanoate
- CAS:1956435-91-8
- MF:C9H17BrO2
- Chemical Name:Flucloxacillin Sodium EP Impurity B
- CAS:
- MF:
- Chemical Name:Acyclovir Impurity 15
- CAS:
- MF:
- Structure:
- Chemical Name:Brivaracetam Impurity 5
- CAS:1942054-60-5
- MF:C7H13BrO2
- Structure:
- Chemical Name:(S,E)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-5-hydroxyhept-2-enoic acid calcium(II)
- CAS:1659317-57-3
- MF:C33H35CaFN2O4
- Structure:
- Chemical Name:Epalrestat Impurity 4
- CAS:130786-32-2
- MF:C8H9NO3S2
- Structure:
- Chemical Name:Apixaban Impurity 73
- CAS:1998079-13-2
- MF:C44H40N8O8
- Structure:
- Chemical Name:Alectinib Impurity 10
- CAS:1256584-81-2
- MF:C28H29N3O3
- Structure:
- Chemical Name:Alectinib Impurity 10
- CAS:1256584-81-2
- MF:C28H29N3O3
- Chemical Name:Acemetacin Impurity C
- CAS:
- MF:
- Chemical Name:Propofol Impurity II (2,6-Diisopropyl-1,4-benzoquinone)
- CAS:
- MF:
- Chemical Name:Vonoprazan Impurity 58
- CAS:
- MF:
- Chemical Name:Tafluprost Impurity 12
- CAS:
- MF:
- Structure:
- Chemical Name:N-(4-AMINO-6,7-DIMETHOXYQUINAZOL-2-YL)-N-METHYL-PROPYLENEDIAMINE, HYDROCHLORIDE
- CAS:81403-69-2
- MF:C14H22ClN5O2
- Structure:
- Chemical Name:N-(4-AMINO-6,7-DIMETHOXYQUINAZOL-2-YL)-N-METHYL-PROPYLENEDIAMINE, HYDROCHLORIDE
- CAS:81403-69-2
- MF:C14H22ClN5O2
- Structure:
- Chemical Name:FAMOTIDINE RELATED COMPOUND B
- CAS:89268-62-2
- MF:C16H23N11O2S5
- Structure:
- Chemical Name:TIZOXANIDE GLUCURONIDE, SODIUM SALT
- CAS:221287-83-8
- MF:C16H14N3NaO10S
- Structure:
- Chemical Name:ETHYL (2E)-CHLORO(PHENYLHYDRAZONO)ACETATE
- CAS:28663-68-5
- MF:C10H11ClN2O2
- Chemical Name:Sugammadex sodium Impurity 50
- CAS:
- MF:
- Chemical Name:Cabozantinib impurity 39
- CAS:
- MF:
- Chemical Name:Cabozantinib impurity 53
- CAS:
- MF:
- Structure:
- Chemical Name:1-(2-chloro-2-(2,4-difluorophenyl)ethyl)-1H-1,2,4-triazole
- CAS:206050-24-0
- MF:C10H8ClF2N3
- Structure:
- Chemical Name:methyl 1-phenylethanesulfonate
- CAS:883835-57-2
- MF:C9H12O3S
- Chemical Name:Doxofylline Impurity 22
- CAS:
- MF:
- Chemical Name:Dapoxetine impurity 61
- CAS:
- MF:
- Chemical Name:Dapoxetine impurity 55
- CAS:
- MF:
- Structure:
- Chemical Name:1-METHYLBIGUANIDE SULPHATE
- CAS:1609-00-3
- MF:C3H9N5
- Structure:
- Chemical Name:1-(3,5-DIHYDROXYPHENYL)-2-[(1,1-DIMETHYLETHYL)AMINO]-ETHANONE, HYDROCHLORIDE
- CAS:1246815-70-2
- MF:C12H18ClNO3
- Structure:
- Chemical Name:tert-Butyl 4-bromobutanoate
- CAS:110611-91-1
- MF:C71H110NO15P
- Structure:
- Chemical Name:2-[4-(2,3-EPOXYPROPOXY)PHENYL]ACETAMIDE
- CAS:29122-69-8
- MF:C11H13NO3
- Chemical Name:Oxacillin Impurity H
- CAS:
- MF:
- Structure:
- Chemical Name:4-(6'-oxo-1'-phenyl-1',6'-dihydro-[2,3'-bipyridin]-5'-yl)benzonitrile
- CAS:380918-54-7
- MF:C23H15N3O
- Chemical Name:Empagliflozin Impurity 79
- CAS:
- MF:
- Structure:
- Chemical Name:Empagliflozin Impurity 89
- CAS:2452301-32-3
- MF:C23H25ClO7
- Structure:
- Chemical Name:Levocarnitine Impurity F
- CAS:6490-19-3
- MF:C7H17ClN2O2
- Structure:
- Chemical Name:4,4-dimethyl-2-(2-phenylpropan-2-yl)oxazo‐ line
- CAS:874895-87-1
- MF:C14H19NO
- Chemical Name:Formoterol Impurity 4
- CAS:
- MF: