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Pharmaceutical Impurity Reference Standards
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- Structure:
- Chemical Name:
- N-(4,5-Dihydro-1H-iMidazol-2-yl)-6-quinoxalinaMine
- CAS:
- 91147-43-2
- MF:
- C11H11N5
- Structure:
- Chemical Name:
- Nor Lidocaine Hydrochloride
- CAS:
- 7729-94-4
- MF:
- C12H19ClN2O
- Structure:
- Chemical Name:
- rel-(1R,3S,5S)-8-Methyl-8-azabicyclo[3,2,1]oct-6-en-yl-2-hydroxy-2,2-dithiophen-2-yl acetate
- CAS:
- 136310-66-2
- MF:
- C18H19NO3S2
- Structure:
- Chemical Name:
- (11β)-17-(Acetyloxy)-11-[4-(diMethylaMino)phenyl]-3-hydroxy-19-norpregna-1,3,5(10)-trien-20-one
- CAS:
- 709615-25-8
- MF:
- C30H37NO4
- Structure:
- Chemical Name:
- 4-[4-[4-(Diphenylmethylene)-1-piperidinyl]-1-hydroxybutyl]-α,α-dimethyl-benzeneacetic Acid
- CAS:
- 1187954-57-9
- MF:
- C32H37NO3
- Structure:
- Chemical Name:
- (2S,3R,4R,5S)-1-(2-hydroxyethyl)-2-(hydroxymethyl)-3,4,5-Piperidinetriol Hydrochloride
- CAS:
- 1370331-33-1
- MF:
- C8H17NO5
- Structure:
- Chemical Name:
- (3S,5R)-Rosuvastatin
- CAS:
- 1242184-42-4
- MF:
- C22H28FN3O6S
- Structure:
- Chemical Name:
- (S)-5-(2-AMinopropyl)-2-MethoxybenzenesulfonaMide
- CAS:
- 119714-13-5
- MF:
- C10H16N2O3S
- Structure:
- Chemical Name:
- Afatinib IMpurity I
- CAS:
- 1637254-93-3
- MF:
- C22H19BrClFN4O3
- Structure:
- Chemical Name:
- Aripiprazole iMpurity 2
- CAS:
- 1424857-93-1
- MF:
- C14H18Cl2N2
- Chemical Name:
- Avanafil IMpurity 6
- Chemical Name:
- Cefoxitin iMpurity F (S-Methoxy cefoxitin)
- Structure:
- Chemical Name:
- Clopidogrel IMpurity 1
- MF:
- C15H14ClNO2S
- Chemical Name:
- LincoMycin iMpurity A
- Chemical Name:
- Posaconazole iMpurity 1
- Chemical Name:
- Riociguat IMpurtiy
- CAS:
- 2920299-23-4
- Chemical Name:
- TelMisartan IMpurity E
- Structure:
- Chemical Name:
- IverMectin B1 Mono-sugar Derivative
- CAS:
- 71837-27-9
- MF:
- C41H62O11
- Structure:
- Chemical Name:
- TERBUTALINE IMPURITY C
- CAS:
- 139508-58-0
- MF:
- C12H17NO3
- Structure:
- Chemical Name:
- 3-(4-FLUORO-PHENYL)-1-ISOPROPYL-1H-INDOLE-2-CARBALDEHYDE
- CAS:
- 101125-34-2
- MF:
- C18H16FNO
- Structure:
- Chemical Name:
- 3,4-DIMETHOXY-2-HYDROXYBENZALDEHYDE
- CAS:
- 19283-70-6
- MF:
- C9H10O4
- Chemical Name:
- Brivaracetam Impurity 55
- Structure:
- Chemical Name:
- alpha-(4-chlorophenyl)-alpha-[2-(dimethylamino)ethyl]pyridine-2-acetonitrile
- CAS:
- 65676-21-3
- MF:
- C17H18ClN3
- Chemical Name:
- Baloxavir Impurity ABCDEFGHJKL
- Structure:
- Chemical Name:
- INDEX NAME NOT YET ASSIGNED
- CAS:
- 2514724-36-6
- MF:
- C22H19F2N3
- Structure:
- Chemical Name:
- scopoline
- CAS:
- 487-27-4
- MF:
- C8H13NO2
- Structure:
- Chemical Name:
- N-(1-benzylpiperidin-4-yl)-N-phenylpropionamide
- CAS:
- 1474-02-8
- MF:
- C21H26N2O
- Chemical Name:
- Oseltamivir Impurity 106
- Chemical Name:
- Oseltamivir Impurity 85
- Chemical Name:
- Oseltamivir Impurity 83
- Chemical Name:
- Oseltamivir Impurity 75
- Structure:
- Chemical Name:
- [1,1'-bicyclohexyl]-1-carboxylic acid
- CAS:
- 60263-54-9
- MF:
- C13H22O2
- Structure:
- Chemical Name:
- 3-Pyridinecarboxamide, 5-chloro-N-[4-(4-chloro-2-thienyl)-5-(4-cyclohexyl-1-piperazinyl)-2-thiazolyl]-6-(dimethylamino)-
- CAS:
- 2626934-45-8
- MF:
- C25H30Cl2N6OS2
- Chemical Name:
- Dapagliflozin Impurity 49
- Structure:
- Chemical Name:
- 11-[3-(dimethylamino)propyl]-6,11-dihydrodibenz[b,e]oxepin-11-ol
- CAS:
- 4504-88-5
- MF:
- C19H23NO2
- Chemical Name:
- Avatrombopag Impurity ABCDEFGHJKL
- Structure:
- Chemical Name:
- 1-(2-chloroethyl)-3-(dicyclopropylmethyl)urea
- CAS:
- 54187-03-0
- MF:
- C10H17ClN2O
- Structure:
- Chemical Name:
- 1,3-Dioxane-4-acetic acid, 6-[2-[3-[[[2-[(4R,6R)-6-[2-(1,1-dimethylethoxy)-2-oxoethyl]-2,2-dimethyl-1,3-dioxan-4-yl]ethyl]amino]carbonyl]-5-(4-fluorophenyl)-2-(1-methylethyl)-4-phenyl-1H-pyrrol-1-yl]ethyl]-2,2-dimethyl-, 1,1-dimethylethyl ester, (4R,6R)-
- CAS:
- 1229658-18-7
- MF:
- C48H67FN2O9
- Structure:
- Chemical Name:
- 1H-Pyrrole-1-heptanoic acid, 2-(4-fluorophenyl)-β,δ-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-, 1,1-dimethylethyl ester, (βS,δR)-
- CAS:
- 2588261-38-3
- MF:
- C37H43FN2O5
- Structure:
- Chemical Name:
- 3-hydroxy-2,4-dimethoxybenzaldehyde
- CAS:
- 32246-34-7
- MF:
- C9H10O4
- Structure:
- Chemical Name:
- butyl 3-aminosulphonyl-5-butylamino-4-phenoxybenzoate
- CAS:
- 32643-00-8
- MF:
- C21H28N2O5S
- Structure:
- Chemical Name:
- 11beta,16alpha,17,21-tetrahydroxypregn-4-ene-3,20-dione
- CAS:
- 1171-81-9
- MF:
- C21H30O6
- Structure:
- Chemical Name:
- ethyl (R)-thiazolidine-4-carboxylate
- CAS:
- 60664-15-5
- MF:
- C6H11NO2S
- Structure:
- Chemical Name:
- 3-((3R,4R)-3-(7H-[4,7'-bipyrrolo[2,3-d]pyrimidin]-4'-yl(methyl) amino)-4-methylpiperidin-1-yl)-3-oxopropanenitrile
- CAS:
- 2504210-48-2
- MF:
- C22H23N9O
- Chemical Name:
- Faropenem Impurity D
- Structure:
- Chemical Name:
- [2S-(2alpha,5alpha,6alpha)]-6-bromo-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
- CAS:
- 24138-28-1
- MF:
- C8H10BrNO3S
- Structure:
- Chemical Name:
- 5-nitro-2-furaldehyde (5-nitrofurfurylene)hydrazone
- CAS:
- 736-53-8
- MF:
- C10H6N4O6
- Structure:
- Chemical Name:
- 4-(benzo[b]thiophen-4-yl)-1,1-bis(4-((2-oxo-1,2-dihydroquinolin-7-yl)oxy)butyl)piperazin-1-ium chloride
- CAS:
- 2454317-16-7
- MF:
- C38H41N4O4S
- Structure:
- Chemical Name:
- methyl (R)-thiazolidine-4-carboxylate
- CAS:
- 42258-90-2
- MF:
- C5H9NO2S
- Structure:
- Chemical Name:
- Revefenacin Impurity 7
- CAS:
- 1158777-54-8
- MF:
- C14H19ClN2O3
- Structure:
- Chemical Name:
- Desethyl Acetate (E)-CefuroxiMe Axetil
- CAS:
- 97232-97-8
- MF:
- C16H16N4O8S
- Structure:
- Chemical Name:
- 6-AMino-5-azacytidine
- CAS:
- 105331-00-8
- MF:
- C8H13N5O5
- Structure:
- Chemical Name:
- N-Methyl-3-phenylpropan-1-aMine hydrochloride (RelCpd B)
- CAS:
- 30684-07-2
- MF:
- C10H16ClN
- Structure:
- Chemical Name:
- 1-[2-[(2,6-diMethylphenyl)thio]phenyl]- Piperazine
- CAS:
- 508233-76-9
- MF:
- C18H22N2S
- Structure:
- Chemical Name:
- trans-2-amino-N-(4-hydroxycyclohexyl)benzamide
- CAS:
- 15942-11-7
- MF:
- C13H18N2O2
- Structure:
- Chemical Name:
- 4-O-(Carboxymethyl)rifamycin
- CAS:
- 13929-35-6
- MF:
- C39H49NO14
- Structure:
- Chemical Name:
- ethyl 3,5-bis(benzyloxy)benzoate
- CAS:
- 50841-46-8
- MF:
- C23H22O4
- Chemical Name:
- (R)-8-(3-aminopiperidin-1-yl)-3-methyl-1,7-bis((4-methylquinazolin-2-yl)methyl)-3,7-dihydro-1H-purine-2,6-dione
- Chemical Name:
- Oxytocin Impurity 8 Trifluoroacetate
- Chemical Name:
- Peramivir Dehydrated Impurity
- Chemical Name:
- Apixaban Impurity 78
- Chemical Name:
- Formoterol Impurity 32
- Chemical Name:
- (1S,2S,3R,4R)-2-((R)-1-acetamido-2-ethylbutyl)-4-guanidino-3-hydroxycyclopentane-1-carboxylic acid
- Structure:
- Chemical Name:
- Desloratadine EP impurity A hcl
- CAS:
- 2250242-44-3
- MF:
- C19H21Cl2FN2
- Structure:
- Chemical Name:
- (3S,4S)-Tofacitinib
- CAS:
- 1092578-47-6
- MF:
- C16H20N6O
- Chemical Name:
- Rosuvastatin Impurity 145
- Chemical Name:
- Apixaban Impurities 15 Complete Set
- Chemical Name:
- Peramivir Intermediate impurity 1
- Chemical Name:
- Rosuvastatin EP Impurity G
- Chemical Name:
- Peramivir Intermediate Impurity 43
- Chemical Name:
- Peramivir Deacetylated Impurity
- Chemical Name:
- Linagliptin Impurity 49
- Chemical Name:
- Loxoprofen Sodium Impurity 35
- Chemical Name:
- Dashatinib impurity 46
- Structure:
- Chemical Name:
- (R,S)-N-Acetyl-3,4-dimethoxy phenylalanine
- CAS:
- 27313-65-1
- MF:
- C13H17NO5
- Chemical Name:
- Oxytocin oxide impurity reference substance
- Chemical Name:
- Troxipide Impurity 7
- Chemical Name:
- Bendamustine Impurity 37A
- Chemical Name:
- Brivaracetam Impurity 50
- Chemical Name:
- 6-Hydroxymoxifloxacin Impurities
- Chemical Name:
- (S)-4-(((R)-1-carboxy-2-((3-hydroxypropyl)thio)ethyl)amino)-3-hydroxy-4-oxobutanoic acid
- Structure:
- Chemical Name:
- 1,3-bis(5-bromo-2-methoxyphenyl)adamantane
- CAS:
- 932033-56-2
- MF:
- C24H26Br2O2
- Structure:
- Chemical Name:
- (S)-dimethyl 2-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioate
- CAS:
- 67676-60-2
- MF:
- C22H27ClN8O5
- Structure:
- Chemical Name:
- 2-Pyrazinecarboxylic acid, 6-methyl-, 4-oxide
- CAS:
- 51037-31-1
- MF:
- C6H6N2O3
- Chemical Name:
- Furoxine GSK Open Ring Impurity
- Structure:
- Chemical Name:
- INDEX NAME NOT YET ASSIGNED
- CAS:
- 2681355-40-6
- MF:
- C29H34Cl2N6O4S2
- Chemical Name:
- Isavuconazole Impurity 48
- Chemical Name:
- 5,5'-((1R,1'R)-((5,6-diethyl-2,3-dihydro-1H-inden-2-yl)azanediyl)bis(1-hydroxyethane-2,1-diyl))bis(8-hydroxyquinolin-2(1H)-one)
- Structure:
- Chemical Name:
- (S)-2-(1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl)-5-nitroisoindoline-1,3-dione
- MF:
- C20H20N2O8S
- Structure:
- Chemical Name:
- 2-(4-(2-(4-(1-(2-methoxyethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-2-methylpropanoic acid
- MF:
- C27H35N3O3
- Chemical Name:
- Tafluprost Impurity 19
- Chemical Name:
- Rosuvastatin Impurity 162
- Chemical Name:
- Rosuvastatin Impurity 151
- Chemical Name:
- Rosuvastatin Impurity 148
- Structure:
- Chemical Name:
- FUROSEMIDE ACYL-B-D-GLUCURONIDE
- CAS:
- 72967-59-0
- MF:
- C18H19ClN2O11S
- Chemical Name:
- Digoxin Impurity 1
- Chemical Name:
- Bimatoprost Impurity 23
- Chemical Name:
- Oxacillin Impurity IMPA