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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
SalMeterol EP IMpurity D SalMeterol EP IMpurity D 1391052-04-2 C34H47NO7
3-Pyridinecarboxylic Acid 2-AMinoethyl Ester Dihydrochloride 3-Pyridinecarboxylic Acid 2-AMinoethyl Ester Dihydrochloride 87330-70-9 C8H11ClN2O2
PeMetrexed EP IMpurity D PeMetrexed EP IMpurity D 144051-68-3 C25H28N6O9
SuMatriptan EP IMpurity F SuMatriptan EP IMpurity F 2074615-63-5 C13H17N3O2S
2-[[(5-hydroxy-1H-benziMidazol-2-yl)sulfinyl]Methyl]-3,5-diMethyl-1-4(1H)-pyridone 2-[[(5-hydroxy-1H-benziMidazol-2-yl)sulfinyl]Methyl]-3,5-diMethyl-1-4(1H)-pyridone C15H15N3O3S
Perindopril Impurity Perindopril Impurity
4-Acetoxyisophthalic Acid 4-Acetoxyisophthalic Acid 5985-26-2 C10H8O6
Ganciclovir Dipropionate Ganciclovir Dipropionate 86357-20-2 C15H21N5O6
IMp. A (EP): (RS)-2-Chloro-N-(2-Methylphenyl)-PropanaMide IMp. A (EP): (RS)-2-Chloro-N-(2-Methylphenyl)-PropanaMide 39084-88-3 C10H11Cl2NO
1β-Hydroxy-6α-Methyl-1,4-androstadiene-3,17-dione 1β-Hydroxy-6α-Methyl-1,4-androstadiene-3,17-dione 61919-52-6 C20H26O3
5-Fluoro ent-LaMivudine Acid D-Menthol Ester 5-Fluoro ent-LaMivudine Acid D-Menthol Ester 764659-79-2 C18H26FN3O4S
Tricyclo[3.3.1.13,7]decan-1-aMine, 3,5,7-triMethyl-, hydrochloride Tricyclo[3.3.1.13,7]decan-1-aMine, 3,5,7-triMethyl-, hydrochloride 15210-60-3 C13H24ClN
3-((butyryloxy)Methyl) 5-Methyl 4-(2',3'-dichlorophenyl)-2,6-diMethylpyridine-3,5-dicarboxylate 3-((butyryloxy)Methyl) 5-Methyl 4-(2',3'-dichlorophenyl)-2,6-diMethylpyridine-3,5-dicarboxylate 188649-48-1 C21H21Cl2NO6
Bis Valacyclovir (~90%) Bis Valacyclovir (~90%) 1356019-51-6 C27H40N12O8
Flupirtine DiMer Flupirtine DiMer 1417916-52-9 C30H32F2N8O4
(S)-2-((R)-1-(3,5-bis(trifluoroMethyl)phenyl)ethoxy)-4-benzylMorpholin-3-one (S)-2-((R)-1-(3,5-bis(trifluoroMethyl)phenyl)ethoxy)-4-benzylMorpholin-3-one 327623-36-9 C21H19F6NO3
3-(5-Methyl-3-phenylisoxazol-4-yl)benzenesulfonaMide 3-(5-Methyl-3-phenylisoxazol-4-yl)benzenesulfonaMide 2304623-36-5 C16H14N2O3S
EsoMeprazole iMpurity EsoMeprazole iMpurity 1424857-86-2 C11H15NO3
AMoxicillin iMpurity L AMoxicillin iMpurity L C16H19N3O5S
Azilsartan iMpurity G Azilsartan iMpurity G
(R)-N-(1-(naphthalen-1-yl)ethyl)-3-(M-tolyl)propan-1-aMine (R)-N-(1-(naphthalen-1-yl)ethyl)-3-(M-tolyl)propan-1-aMine 253337-60-9 C22H25N
3-((3R,4R)-4-Methyl-3-(Methyl(7H-pyrrolo[2,3-d]pyriMidin-4-yl)aMino)piperidin-1-yl)-3-oxopropanaMide 3-((3R,4R)-4-Methyl-3-(Methyl(7H-pyrrolo[2,3-d]pyriMidin-4-yl)aMino)piperidin-1-yl)-3-oxopropanaMide 1675248-19-7 C16H22N6O2
Blonanserin iMpurity Blonanserin iMpurity 132810-83-4 C23H30FN3
Deferasirox iMpurity Deferasirox iMpurity 1688656-83-8 C42H28N6O8S
Lercanidipine iMpurity Lercanidipine iMpurity 320750-19-4 C37H43N3O6
AMpicillin EP IMpurity J AMpicillin EP IMpurity J 6489-58-3 C13H20N2O4S
Anastrozole IMpurity (alfa1 , alfa1, alfa3, alfa3-TetraMethyl-5-(1H-1,2,4-triazol-1-ylMethyl)-1,3-BenzenediacetaMide) Anastrozole IMpurity (alfa1 , alfa1, alfa3, alfa3-TetraMethyl-5-(1H-1,2,4-triazol-1-ylMethyl)-1,3-BenzenediacetaMide) 120512-04-1 C17H23N5O2
CefathiaMidine Lactone CefathiaMidine Lactone 905712-22-3 C17H24N4O4S2
Cinacalcet IMpurity 9 Cinacalcet IMpurity 9 802918-36-1 C22H24F3N
Doxorubicin IMpurity B Doxorubicin IMpurity B 106401-68-7 C29H34BrNO11
EzetiMibe IMpurity B EzetiMibe IMpurity B
Fluconazole IMpurity [1, 3-Bis(1H-1, 2, 4-Triazole-1-yl)propan-2-one] Fluconazole IMpurity [1, 3-Bis(1H-1, 2, 4-Triazole-1-yl)propan-2-one] 1449785-88-9 C10H7F2N3O
HydroxyMethylidene thione HydroxyMethylidene thione 1320360-86-8 C15H18N4OS
Lansoprazole IMpurity I Lansoprazole IMpurity I
Lapatinib IMpurity 10 Lapatinib IMpurity 10 1152131-73-1 C26H17ClFN3O4
Metronidazole IMpurity D Metronidazole IMpurity D
3-(5-Methyl-3-phenylisoxazol-4-yl)benzenesulfonaMide 3-(5-Methyl-3-phenylisoxazol-4-yl)benzenesulfonaMide C16H14N2O3S
Tigecycline Tigecycline
1-((2R,3R,4R,5R)-3-chloro-4-hydroxy-5-(hydroxyMethyl)-3-Methyltetrahydrofuran-2-yl)pyriMidine-2,4(1H,3H)-dione 1-((2R,3R,4R,5R)-3-chloro-4-hydroxy-5-(hydroxyMethyl)-3-Methyltetrahydrofuran-2-yl)pyriMidine-2,4(1H,3H)-dione 1496551-72-4 C10H13ClN2O5
1-NaphthaleneMethanaMine, 7,8-dihydro-α-Methyl-N-[3-[3-(trifluoroMethyl)phenyl]propyl]-, hydrochloride (1:1), (αR)- 1-NaphthaleneMethanaMine, 7,8-dihydro-α-Methyl-N-[3-[3-(trifluoroMethyl)phenyl]propyl]-, hydrochloride (1:1), (αR)- 1020414-33-8 C22H25ClF3N
4,6-dichloro-2-(propylsulfinyl)pyriMidin-5-aMine 4,6-dichloro-2-(propylsulfinyl)pyriMidin-5-aMine 1823431-32-8 C7H9Cl2N3OS
Acetic acid, [[(3aR,4S,6R,6aS)-tetrahydro-2,2-diMethyl-6-[[(phenylMethoxy)carbonyl]aMino]-4H-cyclopenta-1,3-dioxol-4-yl]oxy]-, ethyl ester Acetic acid, [[(3aR,4S,6R,6aS)-tetrahydro-2,2-diMethyl-6-[[(phenylMethoxy)carbonyl]aMino]-4H-cyclopenta-1,3-dioxol-4-yl]oxy]-, ethyl ester 866551-95-3 C20H27NO7
4',6'-Dinitro-2'-phenoxymethanesulfonanilide 4',6'-Dinitro-2'-phenoxymethanesulfonanilide 51765-56-1 C13H11N3O7S
5-[1-Hydroxy-2-[(1-methyl-3-phenylpropyl)amino]ethyl]salicylic acid methyl ester hydrochloride 5-[1-Hydroxy-2-[(1-methyl-3-phenylpropyl)amino]ethyl]salicylic acid methyl ester hydrochloride 33778-93-7 C20H26ClNO4
Blonanserin Impurity I Blonanserin Impurity I
25,26,26,26,27,27-hexadeuterocholest-5-ene-3,27-diol 25,26,26,26,27,27-hexadeuterocholest-5-ene-3,27-diol 1246302-95-3 C27H40D6O2
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)- 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)- 1564265-95-7 C18H25N3O2
(1S,5R,6R)-5-Hydroxy-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Ethyl Ester (1S,5R,6R)-5-Hydroxy-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Ethyl Ester 876014-27-6 C9H12O4
(3R,5R)-Rosuvastatin Lactone (3R,5R)-Rosuvastatin Lactone 1422954-11-7 C22H26FN3O5S
(S)-4,5,6,7-Tetrahydro-2,6-benzothiazolediamine (S)-4,5,6,7-Tetrahydro-2,6-benzothiazolediamine 1867177-06-7 C9H13N3OS
EMpagliflozin iMpurity 10 EMpagliflozin iMpurity 10 2069942-68-1 C32H37ClO12
EMpagliflozin iMpurity 15 EMpagliflozin iMpurity 15
(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 (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 668269-51-0 C25H28N8O2
ibrutinib iMpurity B ibrutinib iMpurity B
Sunitinib iMpurity A Sunitinib iMpurity A
Sunitinib iMpurity F Sunitinib iMpurity F
(3R,4S)-1-(3-fluorophenyl)-3-((S)-3-(4-fluorophenyl)-3-hydroxypropyl)-4-(4-hydroxyphenyl)azetidin-2-one (3R,4S)-1-(3-fluorophenyl)-3-((S)-3-(4-fluorophenyl)-3-hydroxypropyl)-4-(4-hydroxyphenyl)azetidin-2-one 1700622-06-5 C24H21F2NO3
Betamethasone EP Impurity J Betamethasone EP Impurity J 18383-24-9 C22H30O4
Cefazedone Related Impurity 10 Cefazedone Related Impurity 10 18884-65-6 C10H12N2O5S
Etoricoxib Impurity 8 Etoricoxib Impurity 8 1421227-97-5 C22H20N2O4S
Mupirocin Impurity E Mupirocin Impurity E C26H44O9
Phenylephrine Impurity 1 Phenylephrine Impurity 1 C9H13NO2
Rupatadine Impurity B Rupatadine Impurity B 156523-04-5 C26H24ClN3O
Theophylline Impurity 1 Theophylline Impurity 1 5614-53-9 C9H10N4O3
Venlafaxine N-Dimer Venlafaxine N-Dimer 1187545-61-4 C32H48N2O4
ent-Ivabradine Hydrochloride ent-Ivabradine Hydrochloride 148849-68-7 C27H37ClN2O5
Sofosbuvir metabolites GS566500 Sofosbuvir metabolites GS566500 1233335-78-8 C13H19FN3O9P
Ondansetron impurity G (PhEur) Ondansetron impurity G (PhEur) 99614-04-7 C17H18ClN3O
4-Hydroxy-1-methyl-7-phenoxy-3-isoquinolinecarboxylic acid methyl ester 4-Hydroxy-1-methyl-7-phenoxy-3-isoquinolinecarboxylic acid methyl ester 1421312-34-6 C18H15NO4
2-[(4-METHYLPHENOXY)METHYL]BENZOIC ACID 2-[(4-METHYLPHENOXY)METHYL]BENZOIC ACID 728-97-2 C15H14O3
Ethyl (1R,2R,3S,4R,5S)-4-acetamido-5-amino-2-azido-3- (1-ethylpropoxy)cyclohexanecarboxylate Ethyl (1R,2R,3S,4R,5S)-4-acetamido-5-amino-2-azido-3- (1-ethylpropoxy)cyclohexanecarboxylate 2124269-41-4 C16H29N5O4
2-AMINO-3,5-DIBROMOBENZENE-1-CARBOHYDRAZIDE 2-AMINO-3,5-DIBROMOBENZENE-1-CARBOHYDRAZIDE 97096-13-4 C7H7Br2N3O
Trityl losartan Trityl losartan 133909-99-6 C41H37ClN6O
4-BROMOMETHYLBIPHEBYL-2'-CARBOXYLIC ACID 4-BROMOMETHYLBIPHEBYL-2'-CARBOXYLIC ACID 150766-86-2 C14H11BrO2
Letrozole Impurity Letrozole Impurity
Alogliptin Impurity C Alogliptin Impurity C 1108731-49-2 C20H23N5O3
Parecoxib Impurity J Parecoxib Impurity J
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 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 C38H40N4O4S
Atracurium Impurity F Atracurium Impurity F
Linagliptin Impurity J Linagliptin Impurity J
Linagliptin Impurity Q Linagliptin Impurity Q
(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 (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 C26H24F2N6O2
Rosuvastatin Calcium Impurity Rosuvastatin Calcium Impurity
Canagliflozin Monoacetyl Impurity Canagliflozin Monoacetyl Impurity
Etoricoxib Impurity 13 Etoricoxib Impurity 13 1817735-82-2 C25H20ClN3O3S
Mirabegron Impurity 11 Mirabegron Impurity 11 1684452-85-4 C21H24N4O2S
Riociguat Impurtiy 2 Riociguat Impurtiy 2
Topiroxostat Impurity 9 Topiroxostat Impurity 9 577778-82-6 C13H8N6O
Vonoprazan Impurity F Vonoprazan Impurity F
Vortioxetine Impurity 15 Vortioxetine Impurity 15 2099147-02-9 C28H34N4S2
Dapagliflozin Impurity H Dapagliflozin Impurity H
Dapoxetine Impurity C Dapoxetine Impurity C
Eltrombopag Impurity 4 Eltrombopag Impurity 4
Iodixanol Impurity Iodixanol Impurity
Levothyroxine EP Impurity B Levothyroxine EP Impurity B 1628720-66-0 C15H11ClI3NO4
Ribavirin Imp. EP) Ribavirin Imp. EP)
Sertraline EP Impurity Sertraline EP Impurity C17H17Cl2N
Vildagliptin Related Compound G Vildagliptin Related Compound G 1616662-84-0 C12H20N4O3
3-ethyl 5-isopropyl 2-((2-aminoethoxy)methyl)-4-(2-chlorophenyl)-6-methyl-1,4-dihydropyridine-3,5-dicarboxylate 3-ethyl 5-isopropyl 2-((2-aminoethoxy)methyl)-4-(2-chlorophenyl)-6-methyl-1,4-dihydropyridine-3,5-dicarboxylate 158151-92-9 C22H29ClN2O5
Methyl 3-acetamido-4-(2,4,5-trifluorophenyl)but-2-enoate Methyl 3-acetamido-4-(2,4,5-trifluorophenyl)but-2-enoate 1234321-81-3 C13H12F3NO3
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