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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
2-(4-(6-((5-((2-chloro-6-Methylphenyl)carbaMoyl)thiazol-2-yl)aMino)-2-MethylpyriMidin-4-yl)piperazin-1-yl)ethyl acetate 2-(4-(6-((5-((2-chloro-6-Methylphenyl)carbaMoyl)thiazol-2-yl)aMino)-2-MethylpyriMidin-4-yl)piperazin-1-yl)ethyl acetate 1245157-85-0 C24H28ClN7O3S
Ebastine IMpurity F Ebastine IMpurity F 1429071-63-5 C32H39NO3
N-((S)-1-(((R)-1-Hydroxy-3-Methylbutyl)aMino)-1-oxo-3-phenylpropan-2-yl)pyrazine-2-carboxaMide N-((S)-1-(((R)-1-Hydroxy-3-Methylbutyl)aMino)-1-oxo-3-phenylpropan-2-yl)pyrazine-2-carboxaMide 289472-78-2 C19H24N4O3
Azilsartan iMpurity O Azilsartan iMpurity O 2171316-29-1 C23H19N3O4
cefoxitin iMpurity C cefoxitin iMpurity C
3-((3R,4R)-3-((2-chloro-7H-pyrrolo[2,3-d]pyriMidin-4-yl)(Methyl)aMino)-4-Methylpiperidin-1-yl)-3-oxopropanenitrile 3-((3R,4R)-3-((2-chloro-7H-pyrrolo[2,3-d]pyriMidin-4-yl)(Methyl)aMino)-4-Methylpiperidin-1-yl)-3-oxopropanenitrile 1616761-00-2 C16H19ClN6O
Aprepitant iMpurity Aprepitant iMpurity 96730-04-0 C13H22NO4P
Doxofylline iMpurity Doxofylline iMpurity 254760-82-2 C11H16N4O4
forMoterol iMpurity forMoterol iMpurity
LevetiracetaM IMpurity 4 LevetiracetaM IMpurity 4 1342229-32-6 C10H19NO4
cinacalcet iMpurity 4 cinacalcet iMpurity 4 955373-56-5 C22H20F3N
Acyclovir IMpurity J Acyclovir IMpurity J
AzithroMycin IMpurity K AzithroMycin IMpurity K
AztreonaM IMpurity F AztreonaM IMpurity F 102579-57-7 C15H21N5O8S2
BendaMustine Dideschloroethyl IMpurity BendaMustine Dideschloroethyl IMpurity
BroMocriptine IMpurity F BroMocriptine IMpurity F 82773-21-5 C32H40BrN5O5
Cephalexin IMpurity J Cephalexin IMpurity J C16H17N3O4S
Cetirizine IMpurity (4-Chlorobenzophenone) Cetirizine IMpurity (4-Chlorobenzophenone) 2724877-99-8 C21H25ClN2O3
Dasatinib IMpurity 3 Dasatinib IMpurity 3
Deferasirox IMpurity 2 Deferasirox IMpurity 2
Desvenlafaxine (O-DesMethyl Venlafaxine) FuMarate Desvenlafaxine (O-DesMethyl Venlafaxine) FuMarate 93414-04-1 C20H29NO6
EzetiMibe Dehydoxy IMpurity EzetiMibe Dehydoxy IMpurity 204589-58-2 C24H21F2NO2
Flurbiprofen IMpurity E Flurbiprofen IMpurity E
Levocarnitine IMpurity D Levocarnitine IMpurity D
Montelukast EP IMpurity E Montelukast EP IMpurity E 1187586-58-8 C41H46ClNO5S2
Prasugrel IMpurity 6 Prasugrel IMpurity 6
RebaMipide 2-Chloro IMpurity RebaMipide 2-Chloro IMpurity 90098-06-9 C19H15ClN2O4
Ribavirin IMp. F (EP) Ribavirin IMp. F (EP)
RocuroniuM BroMide IMpurity 17 RocuroniuM BroMide IMpurity 17
SalMeterol IMpurity D SalMeterol IMpurity D C25H37NO4
SulbactaM IMpurity A SulbactaM IMpurity A
Tigecycline Metabolite M6 (9-AniMoMinocycline) Tigecycline Metabolite M6 (9-AniMoMinocycline) 149934-19-0 C23H28N4O7
VerapaMil IMpurity G VerapaMil IMpurity G C27H38N2O4
EthanediaMide iMpurity D EthanediaMide iMpurity D 480452-36-6 C21H30ClN5O5
N-(4-(2-Methyl-5,6-dihydro-4H-benzo[b]oxazolo[5,4-d]azepine-6-carbonyl)phenyl)-[1,1'-biphenyl]-2-carboxaMide N-(4-(2-Methyl-5,6-dihydro-4H-benzo[b]oxazolo[5,4-d]azepine-6-carbonyl)phenyl)-[1,1'-biphenyl]-2-carboxaMide 168626-93-5 C32H25N3O3
1-(4-chlorophenyl)-7-oxo-6-(4-(2-oxopiperidin-1-yl)phenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxaMide 1-(4-chlorophenyl)-7-oxo-6-(4-(2-oxopiperidin-1-yl)phenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxaMide C24H22ClN5O3
Methyl (4-Methylpiperidin-3-yl)carbaMate Methyl (4-Methylpiperidin-3-yl)carbaMate 1204176-45-3 C8H16N2O2
(R)-3-(4-(5-broMo-2-chlorobenzyl)phenoxy)tetrahydrofuran (R)-3-(4-(5-broMo-2-chlorobenzyl)phenoxy)tetrahydrofuran 915095-90-8 C17H16BrClO2
(2S,3R,4S,5S,6R)-2-(3-((5-(4-fluorophenyl)thiophen-2-yl)Methyl)-4-Methylphenyl)-tetrahydro-6-(hydroxyMethyl)-2-Methoxy-2H-pyran-3,4,5-triol (2S,3R,4S,5S,6R)-2-(3-((5-(4-fluorophenyl)thiophen-2-yl)Methyl)-4-Methylphenyl)-tetrahydro-6-(hydroxyMethyl)-2-Methoxy-2H-pyran-3,4,5-triol 1358581-37-9 C25H27FO6S
Levocarnitine iMpurity Levocarnitine iMpurity 6490-20-6 C7H17ClN2O2
3-Hydroxy-4-Methyl-2(5H)-thiophenone 3-Hydroxy-4-Methyl-2(5H)-thiophenone 34876-35-2 C5H6O2S
(1S,3R,7S,8S,8aR)-1,2,3,7,8,8a-Hexahydro-3,7-diMethyl-8-[2-[(2R,4R)-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl]ethyl]-1-naphthalenyl Ester (2Z)-2-Methyl-2-butenoic Acid (1S,3R,7S,8S,8aR)-1,2,3,7,8,8a-Hexahydro-3,7-diMethyl-8-[2-[(2R,4R)-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl]ethyl]-1-naphthalenyl Ester (2Z)-2-Methyl-2-butenoic Acid 1048973-04-1 C24H34O5
(6α)-17,21-Dihydroxy-6-Methylpregna-1,4,9(11)-triene-3,20-dione (6α)-17,21-Dihydroxy-6-Methylpregna-1,4,9(11)-triene-3,20-dione 93269-35-3 C22H28O4
[N(Z)]-N-(3,5-DiMethyl-2(3H)-thiazolylidene)-4-hydroxy-2-Methyl-2H-1,2-benzothiazine-3-carboxaMide 1,1-Dioxide [N(Z)]-N-(3,5-DiMethyl-2(3H)-thiazolylidene)-4-hydroxy-2-Methyl-2H-1,2-benzothiazine-3-carboxaMide 1,1-Dioxide 1262333-25-4 C15H15N3O4S2
Quetiapine Impurity E Quetiapine Impurity E 1371638-05-9 C40H44N6O2S2
(41S,12S,13aS)-13a-ethyl-12-hydroxy-2,3,41,5,6,12,13,13a-octahydro-1H-indolo[3,2,1-de]pyrido[3,2,1-ij][1,5]naphthyridine-12-carboxylic acid (41S,12S,13aS)-13a-ethyl-12-hydroxy-2,3,41,5,6,12,13,13a-octahydro-1H-indolo[3,2,1-de]pyrido[3,2,1-ij][1,5]naphthyridine-12-carboxylic acid 59413-21-7 C20H25N2NaO3
BDJS-SH 1 BDJS-SH 1 36588-45-1 C12H18N2O2
Acyclovir Impurity O Acyclovir Impurity O
Alogliptin Impurity 19 Alogliptin Impurity 19
Aprepitant Impurity 17 Aprepitant Impurity 17 1333998-27-8 C20H19ClF7NO2
Blonanserin impurity A Blonanserin impurity A
Captopril impurity 2 Captopril impurity 2
Ciprofloxacin Impurity D HCl Ciprofloxacin Impurity D HCl 526204-10-4 C17H18FN3O3
Clindamycin Impurity 6 Clindamycin Impurity 6
Dabigatran Impurity 5 Dabigatran Impurity 5
DecitaBine Impurity 10 DecitaBine Impurity 10
Empagliflozin Impurity 17 Empagliflozin Impurity 17 2452301-27-6 C23H28O7
Erlotinib Impurity 31 Erlotinib Impurity 31
Everolimus impurity C Everolimus impurity C
Ezetimibe Impurity 28 Ezetimibe Impurity 28
FeBuxostat Impurity 30 FeBuxostat Impurity 30
Fluconazole Impurity 5 Fluconazole Impurity 5 C13H12F2N6O
Fosaprepitant Impurity 2 Fosaprepitant Impurity 2
Imidafenacin Impurity 4 Imidafenacin Impurity 4 503598-78-5 C16H18N2O
Intedanib Impurity H Intedanib Impurity H
Isavuconazole Impurity 16 Isavuconazole Impurity 16
Isavuconazole Impurity 4 Isavuconazole Impurity 4
Lenvatinib Impurity 4 Lenvatinib Impurity 4 C28H22ClN5O5
Linagliptin Impurity 45 Linagliptin Impurity 45
MiraBegron Impurity F MiraBegron Impurity F
Moxifloxacin Impurity 19 Moxifloxacin Impurity 19
Moxifloxacin Impurity 34 Moxifloxacin Impurity 34 1824286-08-9 C9H7ClF2O3
Nifedipine Impurity J Nifedipine Impurity J 114709-68-1 C16H17N3O5
Oxiracetam Impurity I Oxiracetam Impurity I 142274-07-5 C7H9NO4
PalBociclib Impurity 4 PalBociclib Impurity 4
Plerixafor Impurity 4 Plerixafor Impurity 4
Posaconazole Impurity 29 Posaconazole Impurity 29
Posaconazole Impurity 34 Posaconazole Impurity 34
Posaconazole Impurity 58 Posaconazole Impurity 58
Pregabalin Impurity 4 Pregabalin Impurity 4 1955498-14-2 C10H22ClNO2
Rabeprazole Impurity 17 Rabeprazole Impurity 17
SofosBuvir Impurity 14 SofosBuvir Impurity 14
sofosBuvir Impurity 34 sofosBuvir Impurity 34
SofosBuvir Impurity 50 SofosBuvir Impurity 50
SofosBuvir Impurity 56 SofosBuvir Impurity 56
Tofacitinib impurity T Tofacitinib impurity T 1092578-43-2 C16H20N6O
Valsartan Impurity 39 Valsartan Impurity 39 C24H29N5O3
Donepezil Impurity Donepezil Impurity 844694-84-4 C24H31NO2
imp.E imp.E 950781-89-2 C13H12F3N3O3
Lidocaine EP Impurity Lidocaine EP Impurity 31785-64-5 C12H19ClN2O
Prucalopride Impurity 1 Prucalopride Impurity 1 1900715-96-9 C18H24ClN3O3
3-(5-CHLOROPYRID-2-YL)CARBAMOYLPYRAZINE-2-CARBOXYLIC ACID(WXG01564) 3-(5-CHLOROPYRID-2-YL)CARBAMOYLPYRAZINE-2-CARBOXYLIC ACID(WXG01564) 43200-83-5 C11H7ClN4O3
Ampicillin Impurity Q Ampicillin Impurity Q
Cefdinir Impurity PQ(CP) Cefdinir Impurity PQ(CP)
Cefdinir Impurity IJKL Cefdinir Impurity IJKL
Ceftazidime Impurity A (EP) Ceftazidime Impurity A (EP)
Oxacillin Sodium Impurity E(EP) Oxacillin Sodium Impurity E(EP)
Spectinomycin Impurity B Spectinomycin Impurity B
Eriodictyol-8-glucoside Eriodictyol-8-glucoside 153733-96-1 C21H22O11
Naringin 4'-glucoside Naringin 4'-glucoside 17257-21-5 C33H42O19
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