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Pharmaceutical Impurity Reference Standards
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- Structure:
- Chemical Name:
- Clemastine
- CAS:
- 108825-05-4
- MF:
- C21H26ClNO2
- Structure:
- Chemical Name:
- 4-chloro-7-methoxyquinoline-6-carboxylic acid
- CAS:
- 771464-30-3
- MF:
- C11H8ClNO3
- Structure:
- Chemical Name:
- ethyl (41S,13aR)-13a-ethyl-2,3,41,5,6,13a-hexahydro-1H-indolo[3,2,1-de]pyrido[3,2,1-ij][1,5]naphthyridine-12-carboxylate
- CAS:
- 85647-43-4
- MF:
- C22H26N2O2
- Structure:
- Chemical Name:
- methyl (41R,12R,13aR)-13a-ethyl-12-hydroxy-2,3,41,5,6,12,13,13a-octahydro-1H-indolo[3,2,1-de]pyrido[3,2,1-ij][1,5]naphthyridine-12-carboxylate
- CAS:
- 38990-16-8
- MF:
- C21H26N2O3
- Structure:
- Chemical Name:
- Dolutegravir Impurity 3
- CAS:
- 1973402-05-9
- MF:
- C20H19F2N3O5
- Structure:
- Chemical Name:
- Cistracurium Besylate EP Impurity D
- CAS:
- 1075726-88-3
- MF:
- C31H39NO9S
- Structure:
- Chemical Name:
- (R)-1-[3-[4-Amino-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]piperidin-1-yl]-3-chloropropan-1-one
- CAS:
- 1288338-96-4
- MF:
- C25H25ClN6O2
- Structure:
- Chemical Name:
- Bendamustine Impurity 8
- CAS:
- 1797881-48-1
- MF:
- C14H19Cl2N3O2
- Structure:
- Chemical Name:
- FeBuxostat Impurity 32
- CAS:
- 1805770-41-5
- MF:
- C12H12N2O
- Structure:
- Chemical Name:
- Edoxaban Impurity 9(1R,2S,4S)
- CAS:
- 2024614-15-9
- MF:
- C21H30ClN5O5
- Structure:
- Chemical Name:
- Rivaroxaban Impurity 22
- CAS:
- 1350288-77-5
- MF:
- C19H18ClN3O5S
- Structure:
- Chemical Name:
- Rivaroxaban Impurity 27
- CAS:
- 1369969-44-7
- MF:
- C21H21N3O5
- Structure:
- Chemical Name:
- Abiraterone Impurity 9
- CAS:
- 165334-72-5
- MF:
- C24H31NO
- Chemical Name:
- Gliclazide Impurity A
- Structure:
- Chemical Name:
- Medetomidine Impurity 14
- CAS:
- 79924-14-4
- MF:
- C13H16N2
- Structure:
- Chemical Name:
- Tenofovir Disoproxil Impurity B
- CAS:
- 36817-69-3
- MF:
- C8H11N5O
- Chemical Name:
- Ipragliflozin IMP
- Structure:
- Chemical Name:
- 2-Propanone, 1,3-bis(4-methoxyphenyl)-
- CAS:
- 29903-09-1
- MF:
- C17H18O3
- Structure:
- Chemical Name:
- 1-NaphthaleneMethanaMine, α-Methyl-N-[[3-(trifluoroMethyl)phenyl]Methyl]-, (αR)-
- CAS:
- 1229512-52-0
- MF:
- C20H18F3N
- Structure:
- Chemical Name:
- Benzoic acid, 2-[[[[(5S)-2-oxo-3-[4-(3-oxo-4-Morpholinyl)phenyl]-5-oxazolidinyl]Methyl]aMino]carbonyl]-
- CAS:
- 1365267-37-3
- MF:
- C22H21N3O7
- Structure:
- Chemical Name:
- NSC 609249
- CAS:
- 51012-67-0
- MF:
- C12H20ClNO2
- Structure:
- Chemical Name:
- 1-[(4-Ethoxy-3-formylphenyl)sulfonyl]-4-methylpiperazine
- CAS:
- 332374-42-2
- MF:
- C14H20N2O4S
- Structure:
- Chemical Name:
- ApovincaMinic Acid Ethyl Ester N-Oxide
- CAS:
- 109741-24-4
- MF:
- C22H26N2O3
- Structure:
- Chemical Name:
- (2R,4S)-ethyl 5-([1,1'-biphenyl]-4-yl)-4-aMino-2-Methylpentanoate
- CAS:
- 752174-62-2
- MF:
- C20H25NO2
- Chemical Name:
- EMpagliflozin iMpurity 12
- Structure:
- Chemical Name:
- (2S,4R)-Teneligliptin
- CAS:
- 1404559-15-4
- MF:
- C22H30N6OS
- Structure:
- Chemical Name:
- Daclatasvir Impurity
- CAS:
- 1417333-83-5
- MF:
- C40H50N8O6
- Structure:
- Chemical Name:
- (3aS,12bS)-2-Methyl-2,3,3a,12b-tetrahydro-1H-dibenzo[2,3:6,7]oxepino[4,5-c]pyrrole
- CAS:
- 65576-39-8
- MF:
- C17H17NO
- Structure:
- Chemical Name:
- 1-[2-[(3,4-diMethylphenyl)thio]phenyl]- Piperazine
- CAS:
- 1293489-74-3
- MF:
- C18H22N2S
- Structure:
- Chemical Name:
- N-acetyl-N-(2-(7-Methoxynaphthalen-1-yl)ethyl)acetaMide
- CAS:
- 1379005-34-1
- MF:
- C17H19NO3
- Chemical Name:
- carfilzoMib iMpurity -A
- Structure:
- Chemical Name:
- (3S,4R)-1-(4-fluorophenyl)-3-((S)-3-(4-fluorophenyl)-3-hydroxypropyl)-4-(4-hydroxyphenyl)azetidin-2-one
- CAS:
- 1593543-00-0
- MF:
- C24H21F2NO3
- Structure:
- Chemical Name:
- ethyl N-((2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)Methyl)-N-pentanoyl-L-valinate
- CAS:
- 1111177-30-0
- MF:
- C26H33N5O3
- Structure:
- Chemical Name:
- Rosuvastatin EP impurity A
- CAS:
- 1714147-50-8
- MF:
- C25H34FN3NaO7S*
- Chemical Name:
- Doxorubicin Impurity 6
- CAS:
- 69429-21-6
- MF:
- C26H27NO11
- Structure:
- Chemical Name:
- Etoricoxib Impurity 11
- CAS:
- 202409-31-2
- MF:
- C17H13ClN2O2S
- Structure:
- Chemical Name:
- Levofloxacin Tetrafluoro Impurity 1
- CAS:
- 110548-02-2
- MF:
- C15H15F4NO4
- Structure:
- Chemical Name:
- Penicillin F Potassium Salt
- CAS:
- 97299-13-3
- MF:
- C14H21KN2O4S
- Structure:
- Chemical Name:
- Olaparib Impurity 31
- CAS:
- 458535-34-7
- MF:
- C12H18N2O2
- Structure:
- Chemical Name:
- Macitentan impurity A
- CAS:
- 441798-25-0
- MF:
- C17H16Br2N6O4S
- Structure:
- Chemical Name:
- 4-(3,4-DICHLOROPHENYL)-3,4-DIHYDRO-2H-NAPHTHALEN-1-ONE OXIME
- CAS:
- 152642-35-8
- MF:
- C16H13Cl2NO
- Structure:
- Chemical Name:
- 3-Pyridinecarboxylic acid, 6-(4-carboxy-1-piperidinyl)-5-chloro-
- CAS:
- 958457-83-5
- MF:
- C12H13ClN2O4
- Chemical Name:
- Linagliptin Impurity C
- Chemical Name:
- Parecoxib Impurity B
- Chemical Name:
- Vildagliptin impurity E
- Structure:
- Chemical Name:
- 3-propylisobenzofuran-1(3H)-one
- CAS:
- 72424-08-9
- MF:
- C11H12O2
- Structure:
- Chemical Name:
- Axitinib Sulfonyl
- CAS:
- 1348536-59-3
- MF:
- C22H18N4O3S
- Chemical Name:
- Atracurium Impurity B
- CAS:
- 87046-74-0
- Structure:
- Chemical Name:
- (R)-4-fluoro-2-((3-methyl-6-(3-((1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)amino)piperidin-1-yl)-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile
- MF:
- C23H24FN7O4
- Structure:
- Chemical Name:
- 2-(2-fluorophenyl)-1-(1H-1,2,4-triazol-1-yl)-3-(4H-1,2,4-triazol-4-yl)propan-2-ol
- MF:
- C13H13FN6O
- Structure:
- Chemical Name:
- Dapagliflozin Impurity 10
- CAS:
- 960404-86-8
- MF:
- C21H25ClO7
- Structure:
- Chemical Name:
- Ibrutinib Impurity 6
- CAS:
- 1917333-91-5
- MF:
- C28H26N6O3
- Chemical Name:
- Imatinib Impurity 5
- Structure:
- Chemical Name:
- Mirabegron Impurity 8 HCl
- CAS:
- 1684452-81-0
- MF:
- C21H24N4O2S
- Structure:
- Chemical Name:
- 1616710-52-1
- CAS:
- 1616710-52-1
- MF:
- C27H34N2O6
- Structure:
- Chemical Name:
- 6-HYDROXY ONDANSETRON
- CAS:
- 110708-17-3
- MF:
- C18H19N3O2
- Structure:
- Chemical Name:
- 8-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-one
- CAS:
- 31251-41-9
- MF:
- C14H10ClNO
- Structure:
- Chemical Name:
- (R)-Ornidazole
- CAS:
- 166734-80-1
- MF:
- C7H10ClN3O3
- Chemical Name:
- Bendamustine Related Impurity 22
- Chemical Name:
- Bendamustine Related Impurity 9
- Structure:
- Chemical Name:
- Edoxaban Impurity 20 (1R,2R,4S)
- CAS:
- 1928729-31-0
- MF:
- C16H29N3O7
- Structure:
- Chemical Name:
- Edoxaban Impurity 40
- CAS:
- 2081883-52-3
- MF:
- C14H27N3O3
- Chemical Name:
- Everolimus Impurity 2
- Chemical Name:
- Levosimendan Impurity 2 (Mixture ofZandEIsomers)
- Structure:
- Chemical Name:
- N-(2,3-Dichloro-phenyl)-N'-[2-(2,3-dichloro-phenylamino)-ethyl]-ethane-1,2-diamine
- MF:
- C16H17Cl4N3
- Structure:
- Chemical Name:
- Solifenacin Related Compound 29
- CAS:
- 861998-77-8
- MF:
- C23H26N2O3
- Chemical Name:
- Ticagrelor Impurity 31
- Structure:
- Chemical Name:
- Ticagrelor Related Compound 46
- CAS:
- 2205903-73-5
- MF:
- C28H42ClN9O8S2
- Structure:
- Chemical Name:
- Ticagrelor Related Compound 71
- CAS:
- 1548397-10-9
- MF:
- C7H8ClN3O3S
- Chemical Name:
- Ticagrelor Related Compound 76
- Chemical Name:
- Vonoprazan Impurity 25
- Structure:
- Chemical Name:
- 1-(3,4-Dimethoxyphenyl)-2-(methylsulfonyl)ethan-1-amine
- CAS:
- 1255909-25-1
- MF:
- C11H17NO4S
- Chemical Name:
- Adefovir Impurity C
- Chemical Name:
- Blonanserin Impurity M
- Chemical Name:
- Brexpiprazole Impurity H
- Chemical Name:
- Cefaclor EP Impurity H
- Chemical Name:
- Flupentixol Impurity B
- Structure:
- Chemical Name:
- Apixaban Impurity 22
- CAS:
- 1449510-64-8
- MF:
- C25H26ClN5O4
- Chemical Name:
- Cefdinir impurity TU mixture
- Chemical Name:
- Fotagliptin Impurity 1
- Chemical Name:
- Rocuronium bromide Impurity 7
- Chemical Name:
- Tofacitinib Impurity 69
- Structure:
- Chemical Name:
- Benzenamine, 3-(2-methyl-1H-imidazol-1-yl)-5-(trifluoromethyl)-
- CAS:
- 641571-06-4
- MF:
- C11H10F3N3
- Structure:
- Chemical Name:
- Ciprofloxacin EP Impurity E
- CAS:
- 879005-96-6
- MF:
- C16H20FN3O
- Structure:
- Chemical Name:
- ethyl 2-(3-cyano-4-propoxyphenyl)-4-methylthiazole-5- carboxylate
- MF:
- C17H18N2O3S
- Structure:
- Chemical Name:
- (2S,5R,6S)-6-bromo-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid Diphenylmethyl Ester
- CAS:
- 74189-25-6
- MF:
- C21H20BrNO3S
- Structure:
- Chemical Name:
- Trelagliptin Impurity 5
- CAS:
- 2087874-92-6
- MF:
- C22H24FN5O5
- Structure:
- Chemical Name:
- 9H-Purin-6-amine, 9-beta-D-arabinofuranosyl-2-methoxy-
- CAS:
- 51742-84-8
- MF:
- C11H15N5O5
- Structure:
- Chemical Name:
- 2-(3-cyano-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid 1-oxide
- CAS:
- 2418591-42-9
- MF:
- C16H16N2O4S
- Structure:
- Chemical Name:
- Ropivacaine impurity
- CAS:
- 1786841-18-6
- MF:
- C12H14N2O3
- Chemical Name:
- Regorafenib Impurity 2
- Chemical Name:
- Vonoprazan Impurity 5
- Structure:
- Chemical Name:
- Bendamustine
- CAS:
- 1219709-86-0
- MF:
- C14H18ClN3O2
- Chemical Name:
- Dapagliflozin Impurity E
- Structure:
- Chemical Name:
- Febuxostat Impurity 14
- CAS:
- 1335202-60-2
- MF:
- C15H16N2OS
- Structure:
- Chemical Name:
- Kaempferol 3-robinoside 7-glucoside
- CAS:
- 114924-89-9
- MF:
- C33H40O20
- Structure:
- Chemical Name:
- Vitexin 7-glucoside
- CAS:
- 35109-95-6
- MF:
- C27H30O15
- Structure:
- Chemical Name:
- 2-amino-9-((1S,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one
- CAS:
- 1367369-77-4
- MF:
- C12H15N5O3
- Chemical Name:
- Carfilzomib Impurity B
- Structure:
- Chemical Name:
- Ornidazole Impurity 1
- CAS:
- 1100750-18-2