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Pharmaceutical Impurity Reference Standards
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- Structure:
- Chemical Name:
- 1-Isobutyl-4-piperidone
- CAS:
- 72544-16-2
- MF:
- C9H17NO
- Structure:
- Chemical Name:
- Fluphenazine decanoate
- CAS:
- 5002-47-1
- MF:
- C32H44F3N3O2S
- Structure:
- Chemical Name:
- Formoterol fumarate dihydrate
- CAS:
- 183814-30-4
- MF:
- C23H28N2O8
- Structure:
- Chemical Name:
- GUANERAN
- CAS:
- 5581-52-2
- MF:
- C9H8N8O2S
- Structure:
- Chemical Name:
- BENZATHINE PENICILLINE G TETRAHYDRATE
- CAS:
- 41372-02-5
- MF:
- C32H38N4O4S
- Structure:
- Chemical Name:
- Chloramphenicol sodium succinate
- CAS:
- 982-57-0
- MF:
- C15H15Cl2N2O8.Na
- Structure:
- Chemical Name:
- 4-(4-Chloro-benzyl)-2H-phthalazin-1-one
- CAS:
- 53242-88-9
- MF:
- C15H11ClN2O
- Structure:
- Chemical Name:
- 2,6-DIMETHYL-4-NITROSOPHENOL
- CAS:
- 14818-35-0
- MF:
- C12H16O2
- Structure:
- Chemical Name:
- Milbemycin oxime
- CAS:
- 129496-10-2
- MF:
- 2C32H45NO7.2C31H43NO7
- Structure:
- Chemical Name:
- DOTHIEPIN HCL
- CAS:
- 897-15-4
- MF:
- C19H22ClNS
- Structure:
- Chemical Name:
- ALPRENOLOL HYDROCHLORIDE
- CAS:
- 13707-88-5
- MF:
- C15H24ClNO2
- Structure:
- Chemical Name:
- 4-BUTYL-4-[HYDROXYMETHYL]-1,2-DIPHENYL-3,5-PYRAZOLIDINEDIONE HYDROGEN SUCCINATE [ESTER]
- CAS:
- 27470-51-5
- MF:
- C24H26N2O6
- Chemical Name:
- ENTEROKINASE
- CAS:
- 9014-74-8
- MF:
- NULL
- Chemical Name:
- CHONDROITIN SULFATE B SODIUM SALT
- CAS:
- 54328-33-5
- MF:
- NULL
- Structure:
- Chemical Name:
- Calcium levulinate dihydrate
- CAS:
- 5743-49-7
- MF:
- C10H18CaO8
- Structure:
- Chemical Name:
- alpha-Ethyl-2-oxo-1-pyrrolidineacetic acid
- CAS:
- 67118-31-4
- MF:
- C8H13NO3
- Structure:
- Chemical Name:
- Piretanide
- CAS:
- 55837-27-9
- MF:
- C17H18N2O5S
- Structure:
- Chemical Name:
- Potassium trichloroammineplatinate (II)
- CAS:
- 13820-91-2
- MF:
- Cl3H3KNPt
- Structure:
- Chemical Name:
- Rilmenidine phosphate
- CAS:
- 85409-38-7
- MF:
- C10H19N2O5P
- Structure:
- Chemical Name:
- Disodium clodronate tetrahydrate
- CAS:
- 88416-50-6
- MF:
- CH7Cl2NaO7P2
- Structure:
- Chemical Name:
- Framycetin sulphate
- CAS:
- 4146-30-9
- MF:
- C23H48N6O17S
- Chemical Name:
- MOLGRASTIM
- CAS:
- 99283-10-0
- Structure:
- Chemical Name:
- 2-(4-Methoxybenzylamino)pyridine
- CAS:
- 52818-63-0
- MF:
- C13H14N2O
- Structure:
- Chemical Name:
- 3-METHOXY-DL-TYROSINE
- CAS:
- 7636-26-2
- MF:
- C10H13NO4
- Structure:
- Chemical Name:
- 4-(DIPHENYLMETHOXY)PIPERIDINE
- CAS:
- 58258-01-8
- MF:
- C18H21NO
- Structure:
- Chemical Name:
- N,N'-Dipropylurea
- CAS:
- 623-95-0
- MF:
- C7H16N2O
- Structure:
- Chemical Name:
- ISOPRENALINE SULFATE
- CAS:
- 6700-39-6
- MF:
- 2C11H17NO3.2H2O.H2O4S
- Structure:
- Chemical Name:
- Spectinomycin sulfate tetrahydrate
- CAS:
- 64058-48-6
- MF:
- C14H26N2O11S
- Structure:
- Chemical Name:
- ACETYLSALICYLSALICYLIC ACID
- CAS:
- 530-75-6
- MF:
- C16H12O6
- Structure:
- Chemical Name:
- DIHYDROERGOCRISTINE MESYLATE
- CAS:
- 24730-10-7
- MF:
- C36H45N5O8S
- Structure:
- Chemical Name:
- 1-Cyanocyclohexaneacetic acid
- CAS:
- 133481-09-1
- MF:
- C9H13NO2
- Structure:
- Chemical Name:
- 2,4-DIAMINO-6-DIMETHYLAMINO-1,3,5-TRIAZINE
- CAS:
- 1985-46-2
- MF:
- C5H10N6
- Structure:
- Chemical Name:
- CAPTOPRIL DISULFIDE
- CAS:
- 64806-05-9
- MF:
- C18H28N2O6S2
- Structure:
- Chemical Name:
- Salmeterol Related Compound B (10 mg) (4-{1-Hydroxy-2-[6-(4-phenylbutan-2-yloxy)hexylamino]ethyl}-2-(hydroxymethyl)phenol)
- CAS:
- 108928-81-0
- MF:
- C25H37NO4
- Structure:
- Chemical Name:
- 2-BENZYL-1,2,3,6,7,11B-HEXAHYDRO-4H-PYRAZION[2,1-A] ISOQUINOLINE-4-ONE
- CAS:
- 54761-87-4
- MF:
- C19H18N2O2
- Structure:
- Chemical Name:
- CHLORHEXIDENE DIACETATE IMPURITY A
- CAS:
- 152504-08-0
- MF:
- C16H24ClN9
- Chemical Name:
- AZITHROMYCIN IMPURITY A
- Structure:
- Chemical Name:
- OXELADIN CITRATE
- CAS:
- 52432-72-1
- MF:
- C20H33NO3.C6H8O7
- Structure:
- Chemical Name:
- 3,4-Dihydro-7-(4-chlorobutoxy)-2(1H)-quinolinone
- CAS:
- 120004-79-7
- MF:
- C13H16ClNO2
- Chemical Name:
- Sugammadex sodium Impurity 46
- Chemical Name:
- Tenofovir Impurity 103
- Chemical Name:
- Cabozantinib impurity 44
- Chemical Name:
- Cabozantinib impurity 40
- Chemical Name:
- Cabozantinib impurity 74
- Chemical Name:
- 5-hydroxy-N,1,2-trimethyl-1H-indole-3-carboxamide
- Chemical Name:
- Doxofylline Impurity 25
- Chemical Name:
- Dapoxetine impurity 62
- Chemical Name:
- Dapoxetine impurity 56
- Structure:
- Chemical Name:
- Phosphonic acid, [[2-(6-amino-9H-purin-9-yl)propoxy]methyl]- (9CI)
- CAS:
- 107021-20-5
- MF:
- C9H14N5O4P
- Chemical Name:
- Sitagliptin EP Impurity 7
- Chemical Name:
- Sitagliptin EP Impurity H
- Structure:
- Chemical Name:
- 7-Benzofurancarboxamide, 4-amino-5-chloro-2,3-dihydro-3-hydroxy-N-[1-(3-methoxypropyl)-4-piperidinyl]-
- CAS:
- 2636673-48-6
- MF:
- C18H26ClN3O4
- Chemical Name:
- Beprostatin impurity 4
- Structure:
- Chemical Name:
- cis-5-chloro-2,3,3a,12b-tetrahydro-2-methyl-1H-dibenz[2,3:6,7]oxepino[4,5-c]pyrrole
- CAS:
- 65621-78-5
- MF:
- C17H16ClNO
- Structure:
- Chemical Name:
- (+/-)-tert-Butyl 6-Chloro-5-hydroxy-3-oxohexanoate
- CAS:
- 319924-73-7
- MF:
- C10H17ClO4
- Structure:
- Chemical Name:
- (R)-2-(2-aminothiazol-4-yl)-N-(2-(2-((2-hydroxy-2-phenylethyl)amino)ethyl)phenyl)acetamide
- CAS:
- 1684452-80-9
- MF:
- C21H24N4O2S
- Structure:
- Chemical Name:
- 1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic Acid 3-[2-[(3,3-Diphenylpropyl)methylamino]-1,1-dimethylethyl] 5-ethyl Ester Hydrochloride
- CAS:
- 210579-71-8
- MF:
- C37H44ClN3O6
- Structure:
- Chemical Name:
- D(-)-AMETHOPTERIN
- CAS:
- 51865-79-3
- MF:
- C20H22N8O5
- Chemical Name:
- Oseltamivir Impurity 94
- Chemical Name:
- Oseltamivir Impurity 82
- Chemical Name:
- Oseltamivir Impurity 74
- Structure:
- Chemical Name:
- Uridine, 5'-(2-methylpropanoate) (9CI)
- CAS:
- 886538-48-3
- MF:
- C13H18N2O7
- Chemical Name:
- Dapagliflozin Impurity 47
- Chemical Name:
- Crisaborole Impurity 17
- Chemical Name:
- Crisaborole Impurity 19
- Structure:
- Chemical Name:
- 1,5-Pentanedione, 1-(2-fluorophenyl)-5-[(4S)-2-oxo-4-phenyl-3-oxazolidinyl]-
- CAS:
- 2514695-40-8
- MF:
- C20H18FNO4
- Structure:
- Chemical Name:
- 4-ethoxy-3-(4-pyridyl)-3-buten-2-one
- CAS:
- 88349-61-5
- MF:
- C11H13NO2
- Structure:
- Chemical Name:
- 1,3-dihydro-4-methyl-2H-1,5-benzodiazepin-2-one
- CAS:
- 6276-48-8
- MF:
- C10H10N2O
- Structure:
- Chemical Name:
- (E)-2-methoxy-4-(prop-1-enyl)phenol
- CAS:
- 5932-68-3
- MF:
- C10H12O2
- Structure:
- Chemical Name:
- 3-amino-5-[(methylthio)methyl]oxazolidin-2-one
- CAS:
- 25517-72-0
- MF:
- C5H10N2O2S
- Structure:
- Chemical Name:
- methyl tosylcarbamate
- CAS:
- 14437-03-7
- MF:
- C9H11NO4S
- Structure:
- Chemical Name:
- (1R,2R,4S,5S,7s,9r)-9-butyl-9-methyl-7-((2-phenylacryloyl)oxy)-3-oxa-9-azatricyclo[3.3.1.02,4]nonan-9-ium
- CAS:
- 786598-71-8
- MF:
- C21H28NO3+
- Structure:
- Chemical Name:
- (+)-2-Ethoxy-4-(N-3-Methyl-1(S)-(2-(1-Piperidinyl)Phenyl)-Butyl)Carbamoylmethyl)
- CAS:
- 147770-06-7
- MF:
- C29H40N2O4
- Structure:
- Chemical Name:
- 4-Chloro-2-(chloromethyl)-3-Methyl Pyridine Hydrochloride
- CAS:
- 152402-97-6
- MF:
- C7H8Cl3N
- Structure:
- Chemical Name:
- 4-(3-CYANO-2-METHYLPROPIONYL)ACETAMILIDE
- CAS:
- 42075-21-8
- Structure:
- Chemical Name:
- Erythromycin, 6-O-Methyl-2',4'-Bis-O-(Trimethylsilyl)-, 9-[O-(1-Methoxy-1-Methylethyl)Oxime]
- CAS:
- 119699-81-9
- MF:
- C48H94N2O14Si2
- Chemical Name:
- (R)-8-(3-aminopiperidin-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-7-(3-oxobutyl)-3,7-dihydro-1H-purine-2,6-dione
- Chemical Name:
- Isavuconazole Impurity 37
- Structure:
- Chemical Name:
- N-((R)-1-(((R)-3-methyl-1-((3aS,4S,6S,7aR)-3a,5,5-trimethylhexahydro-4,6-methanobenzo[d][1,3,2]dioxaborol-2-yl)butyl)amino)-1-oxo-3-phenylpropan-2-yl)pyrazine-2-carboxamide
- CAS:
- 1375004-39-9
- MF:
- C29H39BN4O4
- Chemical Name:
- (S)-1-(2-(((1r,3R,5S,7S)-3,5-dihydroxyadamantan-1-yl)amino)acetyl)pyrrolidine-2-carbonitrile
- Chemical Name:
- Mannitol EP impurity B
- Chemical Name:
- Mannitol EP impurity A
- Chemical Name:
- Peramivir Amino Carboxylic Isomerism Impurity
- Chemical Name:
- Peramivir Chlorinated Impurity
- Chemical Name:
- Brivaracetam Impurity 999
- Chemical Name:
- Dasatinib impurity 48
- Chemical Name:
- Pemetrexed Impurity 120
- Chemical Name:
- Ticagrelor Impurity 101
- Chemical Name:
- 4-tosyl-1,4,8,11-tetraazabicyclo[9.3.1]pentadecane
- Chemical Name:
- 1-(3-((2,4-dimethylphenyl)thio)phenyl)piperazine hydrochloride
- CAS:
- 2137793-92-9
- Chemical Name:
- Apixaban impurity 66S
- Structure:
- Chemical Name:
- Aatrombopag Impurity 17
- CAS:
- 1268118-96-2
- MF:
- C7H4BrClN2S2
- Structure:
- Chemical Name:
- (R)-(-)-2-AMINOBUTANAMIDE HYDROCHLORIDE, 97%
- CAS:
- 103765-03-3
- MF:
- C4H11ClN2O
- Structure:
- Chemical Name:
- Flomoxef Impurity 20 Sodium Salt
- CAS:
- 2095697-77-9
- MF:
- C15H18F2N6O7S2
- Structure:
- Chemical Name:
- ((2R,3S,4R)-3,4,5-trihydroxytetrahydrofuran-2-yl)methyl isobutyrate
- CAS:
- 2591381-21-2
- MF:
- C9H16O6
- Structure:
- Chemical Name:
- 3-Thiophenecarboxylic acid, 4-(bromomethyl)-2-[[(2,6-difluorophenyl)methyl](propoxycarbonyl)amino]-5-(4-nitrophenyl)-, ethyl ester
- CAS:
- 2591260-07-8
- MF:
- C25H23BrF2N2O6S
- Structure:
- Chemical Name:
- Cyclohexanecarboxylic acid, 2-[[[4-[4-(1,2-benzisothiazol-3-yl)-1-piperazinyl]butyl]amino]carbonyl]-, (1R,2S)-rel-
- CAS:
- 190582-37-7
- MF:
- C23H32N4O3S
- Chemical Name:
- Ivabradine Impurity II
- Structure:
- Chemical Name:
- (1R,2R,4S,5S,7r)-9-methyl-3-oxa-9-azatricyclo[3.3.1.02,4]nonan-7-yl 2-hydroxy-2,2-di(thiophen-2-yl)acetate
- CAS:
- 792155-94-3
- MF:
- C18H19NO4S2