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Pharmaceutical Impurity Reference Standards
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- Chemical Name:
- EMtricitabine iMpurity B
- Structure:
- Chemical Name:
- (S,S)-1,7-diazatricyclo[7.3.0.07,11]dodecane-2,6,8,12-tetrone
- CAS:
- 14842-41-2
- MF:
- C10H10N2O4
- Structure:
- Chemical Name:
- 1-Hydroxy-7-Methoxy-1,2,3,4-tetrahydronaphthalene
- CAS:
- 32820-10-3
- MF:
- C11H14O2
- Structure:
- Chemical Name:
- BroMhexine Hydrochloride iMpurity DN-(2-AMino-5-broMobenzyl)-N-MethylcyclohexanaMine Dihydrochloride
- CAS:
- 132004-28-5
- MF:
- C14H21BrN2
- Structure:
- Chemical Name:
- 2-(DiMethylcarbaMoyl)benzoic acid, 97%
- CAS:
- 20320-37-0
- MF:
- C10H11NO3
- Structure:
- Chemical Name:
- RAC DESMETHYL CITALOPRAM HYDROCHLORIDE
- CAS:
- 97743-99-2
- MF:
- C19H19FN2O
- Structure:
- Chemical Name:
- rac-3-Oxo Atorvastatin SodiuM Salt
- CAS:
- 1391052-00-8
- MF:
- C33H34FN2NaO5
- Structure:
- Chemical Name:
- 2-Demethoxy-4-methoxy urapidil
- CAS:
- 34661-79-5
- MF:
- C20H29N5O3
- Structure:
- Chemical Name:
- Ribavirin IMpurity F
- CAS:
- 58151-87-4
- MF:
- C10H14N4O6
- Structure:
- Chemical Name:
- 4-[-((-((4-(5-(Bis(2-hydroxyethyl)aMino)-1-Methyl-1H-benzo[d]iMidazol-2-yl)butanoyl)oxy)ethyl)(2-hydroxyethyl)aMino)-1-Methyl-1H-benzo[d]iMidazol-2-yl)butanic Acid
- CAS:
- 1228551-91-4
- MF:
- C32H41Cl3N6O4
- Structure:
- Chemical Name:
- 3-(6,7-Dihydro-2-Methyl-7-oxo-3-propyl-2H-pyrazolo[4,3-d]pyriMidin-5-yl)-4-ethoxy-benzenesulfonyl Chloride
- CAS:
- 501120-42-9
- MF:
- C17H19ClN4O4S
- Structure:
- Chemical Name:
- (3R,4S)-rel-3-[(1,3-Benzodioxol-5-yloxy)Methyl]-4-(4'-fluoro[1,1'-biphenyl]-4-yl)-piperidine Hydrochloride
- CAS:
- 1217655-87-2
- MF:
- C25H25ClFNO3
- Structure:
- Chemical Name:
- (16α)-16,17-[Butylidenebis(oxy)]-21-hydroxypregna-1,4-diene-3,11,20-trione
- CAS:
- 216453-74-6
- MF:
- C25H32O6
- Structure:
- Chemical Name:
- 6(S)-Hydroperoxy Simvastatin
- CAS:
- 149949-01-9
- MF:
- C25H38O7
- Structure:
- Chemical Name:
- Russupteridine IV
- CAS:
- 2535-20-8
- MF:
- C13H18N4O6
- Structure:
- Chemical Name:
- 2-[(1-Benzylpiperidin-4-yl)hydroxyMethyl]-5,6-diMethoxyindan-1-one
- CAS:
- 197010-20-1
- MF:
- C24H29NO4
- Structure:
- Chemical Name:
- 5,6-trans-Ergocalciferol
- CAS:
- 51744-66-2
- MF:
- C28H44O
- Structure:
- Chemical Name:
- (5R)-ethyl 5-((1R,3aS,7aR)-4-((E)-2-((3S,5R)-3,5-bis(tert-butyldiMethylsilyloxy)-2-Methylenecyclohexylidene)ethyl)-7a-Methyloctahydro-1H-inden-1-yl)hexanoate
- CAS:
- 169900-32-7
- MF:
- C39H70O4Si2
- Structure:
- Chemical Name:
- 2-isonicotinoyl-5,6-diMethoxy-2,3-dihydro-1H-inden-1-one
- CAS:
- 923571-15-7
- MF:
- C17H15NO4
- Structure:
- Chemical Name:
- 4-(2-nitrophenyl)Morpholin-3-one
- CAS:
- 845729-41-1
- MF:
- C10H10N2O4
- Structure:
- Chemical Name:
- Irbesartan IMpurity E
- MF:
- C25H28N6O
- Structure:
- Chemical Name:
- LeflunoMide EP IMpurity G
- CAS:
- 724429-16-7
- MF:
- C12H12N2O2
- Chemical Name:
- Telmisartan impurity C
- Chemical Name:
- Itraconazole iMpurity E
- Structure:
- Chemical Name:
- Edoxaban Isomer (RRR)
- CAS:
- 1255529-24-8
- MF:
- C24H30ClN7O4S
- Structure:
- Chemical Name:
- 1-NaphthaleneacetaMide, 1,2,3,4-tetrahydro-7-Methoxy-
- CAS:
- 92041-01-5
- MF:
- C13H17NO2
- Structure:
- Chemical Name:
- DO2A
- CAS:
- 112193-75-6
- MF:
- C12H24N4O4
- Structure:
- Chemical Name:
- 7-ethyl-5H-chroMeno[2,3-b]pyridin-5-one
- CAS:
- 53944-31-3
- MF:
- C14H11NO2
- Structure:
- Chemical Name:
- 2-Methyl-10H-thieno[2,3-b][1,5]benzodiazepin-4-aMine
- CAS:
- 612503-08-9
- MF:
- C12H11N3S
- Structure:
- Chemical Name:
- 21-Dehydro-16α-hydroxy Prednisolone
- CAS:
- 1188271-73-9
- MF:
- C21H26O6
- Structure:
- Chemical Name:
- (6α,11β)-11,20-Dihydroxy-6-Methyl-3-oxopregna-1,4,17(20)-trien-21-al
- CAS:
- 1338549-02-2
- MF:
- C22H28O4
- Structure:
- Chemical Name:
- (R)-(+)-(3-CHLORO-2-HYDROXYPROPYL)TRIMETHYLAMMONIUM CHLORIDE
- CAS:
- 117604-42-9
- MF:
- C6H15Cl2NO
- Structure:
- Chemical Name:
- REICHSTEIN'S SUBSTANCE S 21-ACETATE
- CAS:
- 640-87-9
- MF:
- C23H32O5
- Structure:
- Chemical Name:
- N,N'-(OXYDI-4,1-PHENYLENE)BISACETAMIDE
- CAS:
- 3070-86-8
- MF:
- C16H16N2O3
- Structure:
- Chemical Name:
- 3-(2-hydroxyethyl) 5-methyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate
- CAS:
- 85677-95-8
- MF:
- C18H20N2O7
- Structure:
- Chemical Name:
- 3-isobutylisobenzofuran-1(3H)-one
- CAS:
- 199736-94-2
- MF:
- C12H14O2
- Structure:
- Chemical Name:
- isopropyl(4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(methyl)carbamate
- CAS:
- 625115-54-0
- MF:
- C22H23FN8O2
- Structure:
- Chemical Name:
- Malvidin 3-O-glucoside
- CAS:
- 18470-06-9
- MF:
- C23H25O12+
- Structure:
- Chemical Name:
- (S)-Olodaterol
- CAS:
- 868049-50-7
- MF:
- C21H26N2O5
- Structure:
- Chemical Name:
- 5,6-DIHYDRO-3-METHYLAMINO-2H-1,4-THIAZIN-2-ONE OXIME
- CAS:
- 148639-72-9
- MF:
- C5H9N3OS
- Structure:
- Chemical Name:
- M-ISOBUTYL IBUPROFEN
- CAS:
- 66622-47-7
- MF:
- C13H18O2
- Structure:
- Chemical Name:
- 1,3-BIS(METHYLTHIO)-2-PROPANOL
- CAS:
- 31805-83-1
- MF:
- C5H12OS2
- Structure:
- Chemical Name:
- 4-ISOTHIOCYANATO-4'-NITRODIPHENYL ETHER
- CAS:
- 19881-18-6
- MF:
- C13H8N2O3S
- Structure:
- Chemical Name:
- (R)-N-Glycidylphthalimide
- CAS:
- 181140-34-1
- MF:
- C11H9NO3
- Structure:
- Chemical Name:
- 6-chloro-N-((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)-5- nitro-2-(propylthio)pyrimidin-4-amine
- CAS:
- 1427523-93-0
- MF:
- C16H15ClF2N4O2S
- Chemical Name:
- Bendamustine Impurity 15
- Chemical Name:
- Bendamustine Related Impurity 10
- Chemical Name:
- Bortezomib Impurity 16
- Structure:
- Chemical Name:
- Captopril Related Compound 8
- CAS:
- 112243-88-6
- MF:
- C9H15NO3S
- Chemical Name:
- Edoxaban Impurity 25 (1R,2S,4R) Oxalate
- Structure:
- Chemical Name:
- Ezetimibe Impurity 35
- CAS:
- 1650568-82-3
- MF:
- C39H46F2N2O5Si2
- Chemical Name:
- Fosaprepitant Impurity 8
- Structure:
- Chemical Name:
- Linagliptin Impurity 28
- CAS:
- 2074688-84-7
- MF:
- C22H23N7O3
- Chemical Name:
- Pantoprazole Impurity 3
- Chemical Name:
- Ticagrelor Related Compound 58
- Chemical Name:
- Vildagliptin Impurity 9
- Structure:
- Chemical Name:
- Cefathiamidine Impurity 5
- CAS:
- 40818-86-8
- MF:
- C10H11ClN2O4S
- Structure:
- Chemical Name:
- methyl 4-hydroxy-3,5-diisopropylbenzoic acid
- MF:
- C14H20O3
- Chemical Name:
- Apixaban Impurity J
- Chemical Name:
- Avibactam Impurity C
- Chemical Name:
- Brexpiprazole Impurity M
- Chemical Name:
- Cefaclor Impurity 5
- Chemical Name:
- Linagliptin Impurity 39
- Chemical Name:
- Peramivir Impurity 5
- Chemical Name:
- Pidotimod Impurity O
- Chemical Name:
- Pramipexole EP Impurity C
- Structure:
- Chemical Name:
- Imiquimod Impurity 5
- CAS:
- 853793-02-9
- MF:
- C15H18N4
- Structure:
- Chemical Name:
- 9-(1,3-diacetate-2-propoxymethyl)guanine
- CAS:
- 86357-19-9
- MF:
- C13H17N5O6
- Structure:
- Chemical Name:
- Cefadroxil Impurity 6
- CAS:
- 2378158-45-1
- MF:
- C32H32N6O9S2
- Structure:
- Chemical Name:
- Loratadine Impurity 9
- CAS:
- 125743-81-9
- MF:
- C22H23ClN2O2
- Chemical Name:
- Metronidazole Impurity 1
- Structure:
- Chemical Name:
- Parecoxib Impurity 16
- CAS:
- 2235371-89-6
- MF:
- C19H18N2O4S
- Chemical Name:
- Rosuvastatin Impurity 54
- Structure:
- Chemical Name:
- Vonoprazan Fumarate Impurity 6
- CAS:
- 2250243-23-1
- MF:
- C33H27F2N5O4S2
- Structure:
- Chemical Name:
- 3-((3aS,4R,6S,6aR)-6-(2-hydroxyethoxy)-2,2-dimethyltetrahydro- 4H-cyclopenta[d][1,3]dioxol-4-yl)-5-(propylthio)-3H-[1,2,3] triazolo[4,5-d]pyrimidin-7-ol
- CAS:
- 1456538-51-4
- MF:
- C17H25N5O5S
- Chemical Name:
- Esomeprazole Impurity 24
- Chemical Name:
- Prasugrel Impurity 15
- Structure:
- Chemical Name:
- Pregabalin Impurity 18
- CAS:
- 1621171-19-4
- MF:
- C9H15NO2
- Chemical Name:
- Pregabalin Impurity 23
- Structure:
- Chemical Name:
- Butylphthalide impurity
- CAS:
- 16692-58-3
- MF:
- C12H14O2
- Structure:
- Chemical Name:
- ethyl 2,5-dihydroxybenzenesulfonate
- MF:
- C8H10O5S
- Structure:
- Chemical Name:
- 5-ALLYLIDENE-10,11-DIHYDRO-5H-DIBENZO[A,D]CYCLOHEPTENE
- CAS:
- 24755-73-5
- MF:
- C18H16
- Chemical Name:
- Nintedanib Impurity 27
- Structure:
- Chemical Name:
- ethyl 2-(2-formyl-3-hydroxyphenyl)-4-methylthiazole-5- carboxylate
- MF:
- C14H13NO4S
- Structure:
- Chemical Name:
- LUMAT-004
- CAS:
- 313544-31-9
- MF:
- C16H17N3O3
- Structure:
- Chemical Name:
- Varenicline Impurity 3
- CAS:
- 1333145-89-3
- MF:
- C14H15N3
- Structure:
- Chemical Name:
- Econazole Related Compound C (15 mg) (1-(4-Chlorobenzyl)-3-[(2RS)-2-[(4-chlorobenzyl)oxy]-2-(2,4-dichlorophenyl)ethyl]imidazolium chloride)
- CAS:
- 57265-33-5
- Structure:
- Chemical Name:
- Amlodipine Impurity 22 (Z-Isomer)
- MF:
- C26H31ClN2O8S
- Structure:
- Chemical Name:
- Amlodipine Impurity 28
- CAS:
- 79781-21-8
- MF:
- C18H20ClNO5
- Chemical Name:
- Axitinib Impurity 16
- Chemical Name:
- Axitinib Impurity 22
- Structure:
- Chemical Name:
- Imidazo[5,1-f][1,2,4]triazin-4(1H)-one, 2-[2-ethoxy-5-[(4-ethyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-5-methyl-7-propyl-
- CAS:
- 448184-48-3
- MF:
- C23H32N6O5S
- Structure:
- Chemical Name:
- Dolutegravir 4-Desfluoro Impurity
- CAS:
- 1863916-87-3
- MF:
- C20H20FN3O5
- Structure:
- Chemical Name:
- Tetrabenazine Dehydro Impurity
- CAS:
- 100322-43-8
- MF:
- C19H25NO3
- Structure:
- Chemical Name:
- Cefotiam Impurity 22
- CAS:
- 1628441-07-5
- MF:
- C13H14N4O5S2
- Structure:
- Chemical Name:
- Dezocine Impurity 2
- CAS:
- 100667-17-2
- MF:
- C16H21NO
- Structure:
- Chemical Name:
- loteprednol Impurity 7
- CAS:
- 82034-20-6
- MF:
- C24H33ClO7
- Structure:
- Chemical Name:
- Sitagliptin Impurity 28
- CAS:
- 898543-70-9
- MF:
- C32H25F12N9O2