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Pharmaceutical Impurity Reference Standards
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- Structure:
- Chemical Name:
- (1R)-3,4-Dihydro-1-phenyl-2(1H)-isoquinolinecarboxylic acid ethyl ester
- CAS:
- 180468-41-1
- MF:
- C18H19NO2
- Structure:
- Chemical Name:
- 2-[4-[(RS)-(4-Chlorophenyl)phenylMethyl]-piperazin-1-yl]ethanolDihydrochloride
- MF:
- C19H25Cl3N2O
- Structure:
- Chemical Name:
- CAPECITABINE related substance USP
- CAS:
- 1262133-68-5
- MF:
- C20H30FN3O9
- Structure:
- Chemical Name:
- 4-AMino-N-[(1-ethyl-2-pyrrolidinyl)Methyl]-5-(ethylsulfonyl)- 2-MethoxybenzaMide N-Oxide
- CAS:
- 71676-01-2
- MF:
- C17H27N3O5S
- Structure:
- Chemical Name:
- 3-[(4-AMino-2-Methyl-5-pyriMidinyl)Methyl]-4-Methyl-5-[2-(sulfooxy)ethyl]thiazoliuM Inner Salt
- CAS:
- 2380-61-2
- MF:
- C12H16N4O4S2
- Structure:
- Chemical Name:
- 1,4-Bis-[4-[4-Methyl-3-[[4-(pyridin-3-yl)pyriMidin-2-yl]aMino]phenyl]carbaMoyl]benzylpiperazine
- CAS:
- 1365802-18-1
- MF:
- C52H48N12O2
- Structure:
- Chemical Name:
- [6R-[6α,7β(R*)]]-7-[(AMinophenylacetyl)aMino]-3-Methyl-8-oxo-5-thia-1-azabicyclo[4.2.0
- CAS:
- 79750-46-2
- MF:
- C16H17N3O4S
- Structure:
- Chemical Name:
- SalMeterol EP IMpurity D
- CAS:
- 1391052-04-2
- MF:
- C34H47NO7
- Structure:
- Chemical Name:
- 3-Pyridinecarboxylic Acid 2-AMinoethyl Ester Dihydrochloride
- CAS:
- 87330-70-9
- MF:
- C8H11ClN2O2
- Structure:
- Chemical Name:
- PeMetrexed EP IMpurity D
- CAS:
- 144051-68-3
- MF:
- C25H28N6O9
- Structure:
- Chemical Name:
- SuMatriptan EP IMpurity F
- CAS:
- 2074615-63-5
- MF:
- C13H17N3O2S
- Structure:
- Chemical Name:
- 2-[[(5-hydroxy-1H-benziMidazol-2-yl)sulfinyl]Methyl]-3,5-diMethyl-1-4(1H)-pyridone
- MF:
- C15H15N3O3S
- Chemical Name:
- Perindopril Impurity
- Structure:
- Chemical Name:
- 4-Acetoxyisophthalic Acid
- CAS:
- 5985-26-2
- MF:
- C10H8O6
- Structure:
- Chemical Name:
- Ganciclovir Dipropionate
- CAS:
- 86357-20-2
- MF:
- C15H21N5O6
- Structure:
- Chemical Name:
- IMp. A (EP): (RS)-2-Chloro-N-(2-Methylphenyl)-PropanaMide
- CAS:
- 39084-88-3
- MF:
- C10H11Cl2NO
- Structure:
- Chemical Name:
- 1β-Hydroxy-6α-Methyl-1,4-androstadiene-3,17-dione
- CAS:
- 61919-52-6
- MF:
- C20H26O3
- Structure:
- Chemical Name:
- 5-Fluoro ent-LaMivudine Acid D-Menthol Ester
- CAS:
- 764659-79-2
- MF:
- C18H26FN3O4S
- Structure:
- Chemical Name:
- Tricyclo[3.3.1.13,7]decan-1-aMine, 3,5,7-triMethyl-, hydrochloride
- CAS:
- 15210-60-3
- MF:
- C13H24ClN
- Structure:
- Chemical Name:
- 3-((butyryloxy)Methyl) 5-Methyl 4-(2',3'-dichlorophenyl)-2,6-diMethylpyridine-3,5-dicarboxylate
- CAS:
- 188649-48-1
- MF:
- C21H21Cl2NO6
- Structure:
- Chemical Name:
- Bis Valacyclovir (~90%)
- CAS:
- 1356019-51-6
- MF:
- C27H40N12O8
- Structure:
- Chemical Name:
- Flupirtine DiMer
- CAS:
- 1417916-52-9
- MF:
- C30H32F2N8O4
- Structure:
- Chemical Name:
- (S)-2-((R)-1-(3,5-bis(trifluoroMethyl)phenyl)ethoxy)-4-benzylMorpholin-3-one
- CAS:
- 327623-36-9
- MF:
- C21H19F6NO3
- Structure:
- Chemical Name:
- 3-(5-Methyl-3-phenylisoxazol-4-yl)benzenesulfonaMide
- CAS:
- 2304623-36-5
- MF:
- C16H14N2O3S
- Structure:
- Chemical Name:
- (S)-2-(3,4-Difluorophenyl)oxirane
- CAS:
- 1006376-63-1
- MF:
- C8H6F2O
- Structure:
- Chemical Name:
- EsoMeprazole iMpurity
- CAS:
- 1424857-86-2
- MF:
- C11H15NO3
- Structure:
- Chemical Name:
- AMoxicillin iMpurity L
- MF:
- C16H19N3O5S
- Chemical Name:
- Azilsartan iMpurity G
- Structure:
- Chemical Name:
- (R)-N-(1-(naphthalen-1-yl)ethyl)-3-(M-tolyl)propan-1-aMine
- CAS:
- 253337-60-9
- MF:
- C22H25N
- Structure:
- Chemical Name:
- 3-((3R,4R)-4-Methyl-3-(Methyl(7H-pyrrolo[2,3-d]pyriMidin-4-yl)aMino)piperidin-1-yl)-3-oxopropanaMide
- CAS:
- 1675248-19-7
- MF:
- C16H22N6O2
- Structure:
- Chemical Name:
- Blonanserin iMpurity
- CAS:
- 132810-83-4
- MF:
- C23H30FN3
- Structure:
- Chemical Name:
- Deferasirox iMpurity
- CAS:
- 1688656-83-8
- MF:
- C42H28N6O8S
- Structure:
- Chemical Name:
- Lercanidipine iMpurity
- CAS:
- 320750-19-4
- MF:
- C37H43N3O6
- Structure:
- Chemical Name:
- AMpicillin EP IMpurity J
- CAS:
- 6489-58-3
- MF:
- C13H20N2O4S
- Structure:
- Chemical Name:
- Anastrozole IMpurity (alfa1 , alfa1, alfa3, alfa3-TetraMethyl-5-(1H-1,2,4-triazol-1-ylMethyl)-1,3-BenzenediacetaMide)
- CAS:
- 120512-04-1
- MF:
- C17H23N5O2
- Structure:
- Chemical Name:
- CefathiaMidine Lactone
- CAS:
- 905712-22-3
- MF:
- C17H24N4O4S2
- Structure:
- Chemical Name:
- Cinacalcet IMpurity 9
- CAS:
- 802918-36-1
- MF:
- C22H24F3N
- Structure:
- Chemical Name:
- Doxorubicin IMpurity B
- CAS:
- 106401-68-7
- MF:
- C29H34BrNO11
- Chemical Name:
- EzetiMibe IMpurity B
- Structure:
- Chemical Name:
- Fluconazole IMpurity [1, 3-Bis(1H-1, 2, 4-Triazole-1-yl)propan-2-one]
- CAS:
- 1449785-88-9
- MF:
- C10H7F2N3O
- Structure:
- Chemical Name:
- HydroxyMethylidene thione
- CAS:
- 1320360-86-8
- MF:
- C15H18N4OS
- Chemical Name:
- Lansoprazole IMpurity I
- Structure:
- Chemical Name:
- Lapatinib IMpurity 10
- CAS:
- 1152131-73-1
- MF:
- C26H17ClFN3O4
- Chemical Name:
- Metronidazole IMpurity D
- Structure:
- Chemical Name:
- 3-(5-Methyl-3-phenylisoxazol-4-yl)benzenesulfonaMide
- MF:
- C16H14N2O3S
- Chemical Name:
- Tigecycline
- Structure:
- Chemical Name:
- 1-((2R,3R,4R,5R)-3-chloro-4-hydroxy-5-(hydroxyMethyl)-3-Methyltetrahydrofuran-2-yl)pyriMidine-2,4(1H,3H)-dione
- CAS:
- 1496551-72-4
- MF:
- C10H13ClN2O5
- Structure:
- Chemical Name:
- 1-NaphthaleneMethanaMine, 7,8-dihydro-α-Methyl-N-[3-[3-(trifluoroMethyl)phenyl]propyl]-, hydrochloride (1:1), (αR)-
- CAS:
- 1020414-33-8
- MF:
- C22H25ClF3N
- Structure:
- Chemical Name:
- 4,6-dichloro-2-(propylsulfinyl)pyriMidin-5-aMine
- CAS:
- 1823431-32-8
- MF:
- C7H9Cl2N3OS
- Structure:
- Chemical Name:
- Acetic acid, [[(3aR,4S,6R,6aS)-tetrahydro-2,2-diMethyl-6-[[(phenylMethoxy)carbonyl]aMino]-4H-cyclopenta-1,3-dioxol-4-yl]oxy]-, ethyl ester
- CAS:
- 866551-95-3
- MF:
- C20H27NO7
- Structure:
- Chemical Name:
- 4',6'-Dinitro-2'-phenoxymethanesulfonanilide
- CAS:
- 51765-56-1
- MF:
- C13H11N3O7S
- Structure:
- Chemical Name:
- 5-[1-Hydroxy-2-[(1-methyl-3-phenylpropyl)amino]ethyl]salicylic acid methyl ester hydrochloride
- CAS:
- 33778-93-7
- MF:
- C20H26ClNO4
- Chemical Name:
- Blonanserin Impurity I
- Structure:
- Chemical Name:
- 25,26,26,26,27,27-hexadeuterocholest-5-ene-3,27-diol
- CAS:
- 1246302-95-3
- MF:
- C27H40D6O2
- Structure:
- Chemical Name:
- 2-Azabicyclo[3.1.0]hexane-3-carbonitrile, 2-[(2R)-2-aMino-2-(3-hydroxytricyclo[3.3.1.13,7]dec-1-yl)acetyl]-, (1R,3R,5R)-
- CAS:
- 1564265-95-7
- MF:
- C18H25N3O2
- Structure:
- Chemical Name:
- (1S,5R,6R)-5-Hydroxy-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Ethyl Ester
- CAS:
- 876014-27-6
- MF:
- C9H12O4
- Structure:
- Chemical Name:
- (3R,5R)-Rosuvastatin Lactone
- CAS:
- 1422954-11-7
- MF:
- C22H26FN3O5S
- Structure:
- Chemical Name:
- (S)-4,5,6,7-Tetrahydro-2,6-benzothiazolediamine
- CAS:
- 1867177-06-7
- MF:
- C9H13N3OS
- Structure:
- Chemical Name:
- EMpagliflozin iMpurity 10
- CAS:
- 2069942-68-1
- MF:
- C32H37ClO12
- Chemical Name:
- EMpagliflozin iMpurity 15
- Structure:
- Chemical Name:
- (S)-8-(3-aMinopiperidin-1-yl)-7-(but-2-ynyl)-3-Methyl-1-((4-Methylquinazolin-2-yl)Methyl)-1H-purine-2,6(3H,7H)-dione
- CAS:
- 668269-51-0
- MF:
- C25H28N8O2
- Chemical Name:
- ibrutinib iMpurity B
- Chemical Name:
- Sunitinib iMpurity A
- Chemical Name:
- Sunitinib iMpurity F
- Structure:
- Chemical Name:
- (3R,4S)-1-(3-fluorophenyl)-3-((S)-3-(4-fluorophenyl)-3-hydroxypropyl)-4-(4-hydroxyphenyl)azetidin-2-one
- CAS:
- 1700622-06-5
- MF:
- C24H21F2NO3
- Structure:
- Chemical Name:
- Betamethasone EP Impurity J
- CAS:
- 18383-24-9
- MF:
- C22H30O4
- Structure:
- Chemical Name:
- Cefazedone Related Impurity 10
- CAS:
- 18884-65-6
- MF:
- C10H12N2O5S
- Structure:
- Chemical Name:
- Etoricoxib Impurity 8
- CAS:
- 1421227-97-5
- MF:
- C22H20N2O4S
- Structure:
- Chemical Name:
- Mupirocin Impurity E
- MF:
- C26H44O9
- Structure:
- Chemical Name:
- Phenylephrine Impurity 1
- MF:
- C9H13NO2
- Structure:
- Chemical Name:
- Rupatadine Impurity B
- CAS:
- 156523-04-5
- MF:
- C26H24ClN3O
- Structure:
- Chemical Name:
- Theophylline Impurity 1
- CAS:
- 5614-53-9
- MF:
- C9H10N4O3
- Structure:
- Chemical Name:
- Venlafaxine N-Dimer
- CAS:
- 1187545-61-4
- MF:
- C32H48N2O4
- Structure:
- Chemical Name:
- ent-Ivabradine Hydrochloride
- CAS:
- 148849-68-7
- MF:
- C27H37ClN2O5
- Structure:
- Chemical Name:
- Sofosbuvir metabolites GS566500
- CAS:
- 1233335-78-8
- MF:
- C13H19FN3O9P
- Structure:
- Chemical Name:
- Ondansetron impurity G (PhEur)
- CAS:
- 99614-04-7
- MF:
- C17H18ClN3O
- Structure:
- Chemical Name:
- 4-Hydroxy-1-methyl-7-phenoxy-3-isoquinolinecarboxylic acid methyl ester
- CAS:
- 1421312-34-6
- MF:
- C18H15NO4
- Structure:
- Chemical Name:
- 2-[(4-METHYLPHENOXY)METHYL]BENZOIC ACID
- CAS:
- 728-97-2
- MF:
- C15H14O3
- Structure:
- Chemical Name:
- Ethyl (1R,2R,3S,4R,5S)-4-acetamido-5-amino-2-azido-3- (1-ethylpropoxy)cyclohexanecarboxylate
- CAS:
- 2124269-41-4
- MF:
- C16H29N5O4
- Structure:
- Chemical Name:
- 2-AMINO-3,5-DIBROMOBENZENE-1-CARBOHYDRAZIDE
- CAS:
- 97096-13-4
- MF:
- C7H7Br2N3O
- Structure:
- Chemical Name:
- Trityl losartan
- CAS:
- 133909-99-6
- MF:
- C41H37ClN6O
- Structure:
- Chemical Name:
- 4-BROMOMETHYLBIPHEBYL-2'-CARBOXYLIC ACID
- CAS:
- 150766-86-2
- MF:
- C14H11BrO2
- Chemical Name:
- Letrozole Impurity
- Structure:
- Chemical Name:
- Alogliptin Impurity C
- CAS:
- 1108731-49-2
- MF:
- C20H23N5O3
- Chemical Name:
- Parecoxib Impurity J
- Structure:
- Chemical Name:
- 6-(4-(4-(benzo[b]thiophen-4-yl)piperazin-1-yl)butoxy)-1-(4-(2-oxo-1,2-dihydroquinolin-7-yloxy)butyl)quinolin-2(1H)-one
- MF:
- C38H40N4O4S
- Chemical Name:
- Atracurium Impurity F
- Chemical Name:
- Linagliptin Impurity J
- Chemical Name:
- Linagliptin Impurity Q
- Structure:
- Chemical Name:
- (R)-2-(((1-(3-(2-cyano-5-fluorobenzyl)-1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)piperidin-3-yl)amino)methyl)-4-fluorobenzonitrile
- MF:
- C26H24F2N6O2
- Chemical Name:
- Rosuvastatin Calcium Impurity
- Chemical Name:
- Canagliflozin Monoacetyl Impurity
- Structure:
- Chemical Name:
- Etoricoxib Impurity 13
- CAS:
- 1817735-82-2
- MF:
- C25H20ClN3O3S
- Structure:
- Chemical Name:
- Mirabegron Impurity 11
- CAS:
- 1684452-85-4
- MF:
- C21H24N4O2S
- Chemical Name:
- Riociguat Impurtiy 2
- Structure:
- Chemical Name:
- Topiroxostat Impurity 9
- CAS:
- 577778-82-6
- MF:
- C13H8N6O
- Chemical Name:
- Vonoprazan Impurity F
- Structure:
- Chemical Name:
- Vortioxetine Impurity 15
- CAS:
- 2099147-02-9
- MF:
- C28H34N4S2
- Chemical Name:
- Dapagliflozin Impurity H
- Chemical Name:
- Dapoxetine Impurity C