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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
D,L N,O-Didesmethylvenlafaxine D,L N,O-Didesmethylvenlafaxine 135308-74-6 C15H23NO2
Desmethyl Erlotinib Acetate Desmethyl Erlotinib Acetate 183320-15-2 C23H23N3O5
Erythromycin E_x000b_Discontinued Erythromycin E_x000b_Discontinued 41451-91-6 C37H65NO14
Avermectin A1a, 25-cyclohexyl-4'-O-de(2,6-dideoxy-3-O-methyl-α-L-arabino-hexopyranosyl)-5-demethoxy-25-de(1-methylpropyl)-22,23-dihydro-23-hydroxy-5-(hydroxyimino)-, (23S)- (9CI) Avermectin A1a, 25-cyclohexyl-4'-O-de(2,6-dideoxy-3-O-methyl-α-L-arabino-hexopyranosyl)-5-demethoxy-25-de(1-methylpropyl)-22,23-dihydro-23-hydroxy-5-(hydroxyimino)-, (23S)- (9CI) 165108-08-7 C43H63NO12
2-(3,4-dihydroxyphenyl)acetaldehyde 2-(3,4-dihydroxyphenyl)acetaldehyde 5707-55-1 C8H8O3
1H-Cyclopropa[3,4]cyclopenta[1,2-c]pyrazole-1-acetamide, N-[(1S)-1-[3-[3-[bis(methylsulfonyl)amino]-4-chloro-1-(2,2,2-trifluoroethyl)-1H-indazol-7-yl]-6-[3-methyl-3-(methylsulfonyl)-1-butyn-1-yl]-2-pyridinyl]-2-(3,5-difluorophenyl)ethyl]-5,5-difluoro-3b,4,4a,5-tetrahydro-3-(trifluoromethyl)-, (3bS,4aR)- 1H-Cyclopropa[3,4]cyclopenta[1,2-c]pyrazole-1-acetamide, N-[(1S)-1-[3-[3-[bis(methylsulfonyl)amino]-4-chloro-1-(2,2,2-trifluoroethyl)-1H-indazol-7-yl]-6-[3-methyl-3-(methylsulfonyl)-1-butyn-1-yl]-2-pyridinyl]-2-(3,5-difluorophenyl)ethyl]-5,5-difluoro-3b,4,4a,5-tetrahydro-3-(trifluoromethyl)-, (3bS,4aR)- 2189684-58-8 C40H34ClF10N7O7S3
NSC 77154 NSC 77154 4121-39-5 C8H9N5
N-Methyl-N,N-bis(2-pyridylethyl)amine N-Methyl-N,N-bis(2-pyridylethyl)amine 5452-87-9 C15H19N3
(S)-3-Methyl-1-(2-piperidin-1-ylphenyl)butylamine (S)-3-Methyl-1-(2-piperidin-1-ylphenyl)butylamine 147769-93-5 C16H26N2
AMIKACIN IMPURITY A AMIKACIN IMPURITY A
ONDANSETRON IMPURITY D ONDANSETRON IMPURITY D
PERINDOPRIL IMPURITY A PERINDOPRIL IMPURITY A
NICERGOLINE IMP. D (EP): 5-BROMOPYRIDINE-3-CARBOXYLIC ACID NICERGOLINE IMP. D (EP): 5-BROMOPYRIDINE-3-CARBOXYLIC ACID
AMOXICILLIN TRIHYDRATE IMP. D (EP) AS SODIUM SALT:(4S)-2-[[[(2R)-2-AMINO-2-(4-HYDROXYPHENYL)ACETYL]AMINO]-CARBOXYMETHYL]-5,5-DIMETHYLTHIAZOLIDINE-4-CARBOXYLIC ACID SODIUM SALT (PENICILLOICACIDS OF AMO AMOXICILLIN TRIHYDRATE IMP. D (EP) AS SODIUM SALT:(4S)-2-[[[(2R)-2-AMINO-2-(4-HYDROXYPHENYL)ACETYL]AMINO]-CARBOXYMETHYL]-5,5-DIMETHYLTHIAZOLIDINE-4-CARBOXYLIC ACID SODIUM SALT (PENICILLOICACIDS OF AMO 1642629-94-4 C16H21N3O6S
4-CHLORO-6-(2-CHLORO-ETHOXY)-7-(2-METHOXY-ETHOXY)-QUINAZOLINE 4-CHLORO-6-(2-CHLORO-ETHOXY)-7-(2-METHOXY-ETHOXY)-QUINAZOLINE 183322-19-2 C13H14Cl2N2O3
2-PIPERAZINE-4-AMINO-6,7-DIMETHOXY QUINOLINE HYDROCHLORIDE 2-PIPERAZINE-4-AMINO-6,7-DIMETHOXY QUINOLINE HYDROCHLORIDE 84050-22-6 C14H20ClN5O2
2-CHLORO-N-(2,3-DIMETHYL-PHENYL)-ACETAMIDE 2-CHLORO-N-(2,3-DIMETHYL-PHENYL)-ACETAMIDE 2564-07-0 C10H12ClNO
1,4-dihydro-2,6-dimethyl-4-(3'-nitrophenyl)-pyridine-3,5-dicarboxylic acid monoisopropyl ester 1,4-dihydro-2,6-dimethyl-4-(3'-nitrophenyl)-pyridine-3,5-dicarboxylic acid monoisopropyl ester 116983-17-6 C18H20N2O6
3-(3-TRIFLUOROMETHYL-PHENYL)-PROPYLAMINE 3-(3-TRIFLUOROMETHYL-PHENYL)-PROPYLAMINE 104774-87-0 C10H12F3N
4-(3,4-Dichloro-phenyl)-3,4-dihydro-2H-naphthalen-1-one 4-(3,4-Dichloro-phenyl)-3,4-dihydro-2H-naphthalen-1-one 124379-29-9 C16H12Cl2O
(4-(2-(azepan-1-yl)ethoxy)phenyl)Methanol (4-(2-(azepan-1-yl)ethoxy)phenyl)Methanol 223251-16-9 C15H23NO2
4-HYDROXY PROPOFOL 4-HYDROXY PROPOFOL 1988-10-9 C12H18O2
(1R,2R)-2-(3,4-difluorophenyl)cyclopropanecarboxylic acid (1R,2R)-2-(3,4-difluorophenyl)cyclopropanecarboxylic acid 220352-36-3 C10H8F2O2
1-((2R,3R)-2-(benzyloxy)pentan-3-yl)-4-(4-(4-(4-hydroxyphenyl)piperazin-1-yl)phenyl)-1H-1,2,4-triazol-5(4H)-one 1-((2R,3R)-2-(benzyloxy)pentan-3-yl)-4-(4-(4-(4-hydroxyphenyl)piperazin-1-yl)phenyl)-1H-1,2,4-triazol-5(4H)-one 2243786-01-6 C30H35N5O3
4-(CHLOROMETHYL)BENZYL ALCOHOL  99 4-(CHLOROMETHYL)BENZYL ALCOHOL 99 16473-35-1 C8H9ClO
4,4′-DIPHENOQUINONE (DQ) 4,4′-DIPHENOQUINONE (DQ) 494-72-4 C12H8O2
S-(+)-O-DESMETHYL VENLAFAXINE S-(+)-O-DESMETHYL VENLAFAXINE 142761-12-4 C16H25NO2
ACETYLSIMVASTATIN ACETYLSIMVASTATIN 145576-25-6 C27H40O6
5-[2-(4'-METHYLBIPHENYL)]TETRAZOLE 5-[2-(4'-METHYLBIPHENYL)]TETRAZOLE 120568-11-8 C14H12N4
L-2-Aminobutanamide L-2-Aminobutanamide 7324-11-0 C4H10N2O
FUROSEMIDE IMPURITY A FUROSEMIDE IMPURITY A C12H11ClN2O5S
GLICLAZIDE IMPURITY F GLICLAZIDE IMPURITY F
(E)-Ceftiofur (E)-Ceftiofur 120882-20-4 C19H17N5O7S3
Cefmetazole Impurity E Cefmetazole Impurity E
Aztreonam USP Impurity B Aztreonam USP Impurity B
Azlocillin Opern-Ring Decarboxylation Impurity Azlocillin Opern-Ring Decarboxylation Impurity 99795-14-9 C19H25N5O5S
Cefotiam Impurity 1 Cefotiam Impurity 1 2243596-87-2 C18H23N9O4S3
Eribulin Impurity 3 Eribulin Impurity 3
sodium 2-(2-(4-((4-chlorophenyl)(phenyl)methyl)-1-oxidopiperazin-1-yl)ethoxy)acetate sodium 2-(2-(4-((4-chlorophenyl)(phenyl)methyl)-1-oxidopiperazin-1-yl)ethoxy)acetate
Brivaracetam Impurity 25 Brivaracetam Impurity 25 10547-88-3 C7H12O2
(S)-N-((R)-1-amino-1-oxobutan-2-yl)-3-(bromomethyl)hexanamide (S)-N-((R)-1-amino-1-oxobutan-2-yl)-3-(bromomethyl)hexanamide
Peramivir Impurity 19 Peramivir Impurity 19
Diquafosol Impurity 13 Diquafosol Impurity 13 211448-81-6 C18H28N4O29P6
Montelukast Sodium EP Impurity G Montelukast Sodium EP Impurity G 1428448-96-7 C35H37ClNNaO3S
Amifostine related impurities 2 Amifostine related impurities 2 17002-55-0 C8H21N3O
Oxacillin Impurity F Oxacillin Impurity F 5053-35-0 C19H19N3O4S2
Peramivir Impurity 30 Peramivir Impurity 30 2758048-79-0 C20H36N2O6
Cabozantinib impurity 37 Cabozantinib impurity 37
4-(1-bromoethyl)-6-(1-(6-chloro-5-fluoropyrimidin-4-yl)ethyl)-5-fluoropyrimidine 4-(1-bromoethyl)-6-(1-(6-chloro-5-fluoropyrimidin-4-yl)ethyl)-5-fluoropyrimidine
ethyl 6-bromo-4,7-bis((dimethylamino)methyl)-5-hydroxy-1-methyl-2-((phenylthio)methyl)-1H-indole-3-carboxylate ethyl 6-bromo-4,7-bis((dimethylamino)methyl)-5-hydroxy-1-methyl-2-((phenylthio)methyl)-1H-indole-3-carboxylate
Dapoxetine impurity 53 Dapoxetine impurity 53
Dapoxetine impurity 70 Dapoxetine impurity 70
Bosutinib Impurity 38 Bosutinib Impurity 38 2095306-26-4 C46H44Cl4N8O6
(2RS)-2-(4-ETHYLPHENYL)PROPANOIC ACID (2RS)-2-(4-ETHYLPHENYL)PROPANOIC ACID 3585-52-2 C11H14O2
Ceftriaxone IMpurit C Ceftriaxone IMpurit C
Flucloxacillin IMpurity G Flucloxacillin IMpurity G
Gefitinib N-Oxide Gefitinib N-Oxide 847949-51-3 C22H24ClFN4O4
Milrinone IMpurity 3 Milrinone IMpurity 3 98293-81-3 C12H7N3O3
Nicardipine Related CoMpound 4 Nicardipine Related CoMpound 4 123973-71-7 C25H27N3O6
PraMipexole IMp.BI-II786BS PraMipexole IMp.BI-II786BS
Propofol IMpurity E Propofol IMpurity E
Solifenacin Related CoMpound 5 Solifenacin Related CoMpound 5
TelMisartan BroMo Ethyl Ester TelMisartan BroMo Ethyl Ester 133085-87-7 C16H15BrO2
Tolterodine Lactol IMpurity Tolterodine Lactol IMpurity 209747-04-6 C16H16O2
Valsartan N1-Trityl IMpurity Valsartan N1-Trityl IMpurity
(3-Carbamoylallyl)trimethylammonium (3-Carbamoylallyl)trimethylammonium 857162-57-3 C7H15N2O+
3-CHLORO-4-HYDROXYACETANILIDE 3-CHLORO-4-HYDROXYACETANILIDE 3964-54-3 C8H8ClNO2
Apixaban IMpurity(BMS-591329-01) Apixaban IMpurity(BMS-591329-01)
ent-14S-3-Methoxy-17-MethylMorphinan ent-14S-3-Methoxy-17-MethylMorphinan 1453167-99-1 C18H25NO
PD 224378 PD 224378 501665-88-9 C20H35NO11
(rac,syn)-4-Deschloro-sertraline (rac,syn)-4-Deschloro-sertraline 871838-58-3 C17H18ClN
1-[2-(DiMethylaMino)-1-phenylethyl]cyclohexanol 1-[2-(DiMethylaMino)-1-phenylethyl]cyclohexanol 93413-86-6 C16H25NO
1-[4-(2-Methoxyethenyl)phenoxy]-3-[(1-Methylethyl)aMino]-2-propanol 1-[4-(2-Methoxyethenyl)phenoxy]-3-[(1-Methylethyl)aMino]-2-propanol 82961-02-2 C15H23NO3
11-Desethyl Irinotecan 11-Desethyl Irinotecan 103816-16-6 C31H34N4O6
5-Methoxy-2-[[(4-Methoxy-3,5-diMethyl-2-pyridinyl)Methyl]thio]-1H-benziMidazole N-Oxide 5-Methoxy-2-[[(4-Methoxy-3,5-diMethyl-2-pyridinyl)Methyl]thio]-1H-benziMidazole N-Oxide 142885-92-5 C17H19N3O3S
7-[[[(CyanoMethyl)thio]acetyl]aMino]-7-Methoxy Cephalosporanic Acid 7-[[[(CyanoMethyl)thio]acetyl]aMino]-7-Methoxy Cephalosporanic Acid 56796-16-8 C15H17N3O7S2
7S-Cefdinir 7S-Cefdinir 178601-89-3 C14H13N5O5S2
Dehydroxy BroMocelecoxib Dehydroxy BroMocelecoxib 170570-75-9 C17H13BrF3N3O2S
Desethylene Norfloxacin Hydrochloride Desethylene Norfloxacin Hydrochloride 75001-77-3 C14H16FN3O3
p-(2,3-Epoxypropoxy)benzyl Alcohol p-(2,3-Epoxypropoxy)benzyl Alcohol 4204-78-8 C10H12O3
5-(3-fluorophenyl)-1H-pyrrole-3-carbaldehyde 5-(3-fluorophenyl)-1H-pyrrole-3-carbaldehyde C11H8FNO
1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic acid bis(1-methylethyl) ester 1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic acid bis(1-methylethyl) ester 21881-78-7 C21H26N2O6
2-(4-Methylphenyl)sulfonyloxyethanol 2-(4-Methylphenyl)sulfonyloxyethanol 42772-85-0 C9H12O4S
2-Azabicyclo[3.1.0]hexane-3-carbonitrile, 2-[(2S)-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-[(2S)-2-aMino-2-(3-hydroxytricyclo[3.3.1.13,7]dec-1-yl)acetyl]-, (1R,3R,5R)- 1564265-94-6 C18H25N3O2
EMpagliflozin  iMpurity 8 EMpagliflozin iMpurity 8
EMpagliflozin  iMpurity 13 EMpagliflozin iMpurity 13 2125472-55-9 C23H25ClO8
6-Methyldi(ondansetron-3-de(1,2-diMethyl-1H-iMidazole)) 6-Methyldi(ondansetron-3-de(1,2-diMethyl-1H-iMidazole)) 1365727-07-6 C27H26N2O2
(-)-Syringaresinol-4-O-beta-D-glucopyranoside (-)-Syringaresinol-4-O-beta-D-glucopyranoside 137038-13-2 C28H36O13
Budesonide Impurity (1, 4-Androstadien-11-beta-16-alfa-diol-3, 17-dione) Budesonide Impurity (1, 4-Androstadien-11-beta-16-alfa-diol-3, 17-dione) 910299-74-0 C19H24O4
Etoricoxib Impurity 12 Etoricoxib Impurity 12 646459-41-8 C21H16ClN3O2S
Levofloxacin Tetrafluoro Impurity 2 Levofloxacin Tetrafluoro Impurity 2 103995-33-1 C14H12F4O4
Mupirocin Impurity C Mupirocin Impurity C C26H44O9
Verapamil Impurity H Verapamil Impurity H 67018-83-1 C26H36N2O4
Warfarin Impurity 1 Warfarin Impurity 1 55901-61-6 C13H14O
Vitexin -4''-O-glucoside Vitexin -4''-O-glucoside 178468-00-3 C27H30O15
Aripiprazole EP impurity D Aripiprazole EP impurity D
Macitentan impurity B Macitentan impurity B 441796-13-0 C18H18Br2N6O4S
Meropenem IMP B Meropenem IMP B
tert-butyl 4-(6-bromopyridin-3-yl)piperazine-1-carboxylate tert-butyl 4-(6-bromopyridin-3-yl)piperazine-1-carboxylate 412348-27-7 C14H20BrN3O2
ETHYL 3,4-EPOXYBUTANOATE ETHYL 3,4-EPOXYBUTANOATE 32223-97-5 C6H10O3
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