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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Ibrutinib Impurity 3 Ibrutinib Impurity 3
Canagliflozin Impurity 9 Canagliflozin Impurity 9
Clopidogrel Impurity 14 Clopidogrel Impurity 14 C15H14ClNO2S
Febuxostat Impurity 53 Febuxostat Impurity 53
Cefodizime Impurity C Cefodizime Impurity C
Riociguat IMpurtiy F Riociguat IMpurtiy F
Acrivastine Impurity 1 Acrivastine Impurity 1
Nifedipine impurity 10 Nifedipine impurity 10 10323-98-5 C13H13NO3
Cefminox Sodium impurity E Cefminox Sodium impurity E
Clindamycin Impurity D Clindamycin Impurity D
Fasudil iMpurity C Fasudil iMpurity C
Cefminox Impurity D Cefminox Impurity D
SORAFENIB N-OXIDE SORAFENIB N-OXIDE 583840-03-3 C21H16ClF3N4O4
ethylmethylglycinexylidide ethylmethylglycinexylidide 74634-66-5 C13H20N2O
L-erythro-3-(3,4-Dihydroxyphenyl)serine L-erythro-3-(3,4-Dihydroxyphenyl)serine 34047-62-6 C9H11NO5
riboflavin 3',5'-bisphosphate riboflavin 3',5'-bisphosphate 86108-26-1 C17H22N4O12P2
6 beta-hydroxycortisol 6 beta-hydroxycortisol 53-35-0 C21H30O6
16-hydroxyclarithromycin 16-hydroxyclarithromycin 124412-58-4 C38H69NO14
2-Benzylidene isobutyryl acetanilide 2-Benzylidene isobutyryl acetanilide 125971-57-5 C19H19NO2
ISOPROPYLAMINE HYDROCHLORIDE ISOPROPYLAMINE HYDROCHLORIDE 15572-56-2 C3H10ClN
Bimatoprost Impurity 17 Bimatoprost Impurity 17
Bumetanide Impurity 10 Bumetanide Impurity 10
Cefoxitin EP Impurity E (R-methoxy cefoxitin) Cefoxitin EP Impurity E (R-methoxy cefoxitin)
4(1H)-Pyrimidinone, 5-amino-6-chloro-2-(propylthio)- 4(1H)-Pyrimidinone, 5-amino-6-chloro-2-(propylthio)- 2512210-21-6 C7H10ClN3OS
Carbamic acid, N-[(1S)-1-methyl-2-oxo-2-[3-(phenylmethoxy)phenyl]ethyl]-, phenylmethyl ester Carbamic acid, N-[(1S)-1-methyl-2-oxo-2-[3-(phenylmethoxy)phenyl]ethyl]-, phenylmethyl ester 2151127-61-4 C24H23NO4
1-(chloromethyl)-4-(dichloromethyl)benzene 1-(chloromethyl)-4-(dichloromethyl)benzene 7398-44-9 C8H7Cl3
4,4'-(propane-1,3-diyl)bismorpholine 4,4'-(propane-1,3-diyl)bismorpholine 48152-09-6 C11H22N2O2
Metronidazole IMpurity (1-Methyl-4-Nitro-1H-IMidazole) Metronidazole IMpurity (1-Methyl-4-Nitro-1H-IMidazole) 143508-97-8 C2H3NO
benidipine benidipine 119009-45-9 C28H31N3O6
(S)-Phenylephrine hydrochloride (S)-Phenylephrine hydrochloride 939-38-8 C9H14ClNO2
4-METHYL-3-[[1-OXO-2-(PROPYLAMINO)PROPYL]AMINO]-2-THIOPHENECARBOXYLIC ACID 4-METHYL-3-[[1-OXO-2-(PROPYLAMINO)PROPYL]AMINO]-2-THIOPHENECARBOXYLIC ACID 114176-52-2 C12H18N2O3S
1-(4-Isobutylphenyl)ethanol 1-(4-Isobutylphenyl)ethanol 40150-92-3 C12H18O
TRIMETHYL(3-HYDROXYPHENYL)AMMONIUMIODIDE TRIMETHYL(3-HYDROXYPHENYL)AMMONIUMIODIDE 2498-27-3 C9H14INO
ACEMETACINTERT-BUTYLESTER ACEMETACINTERT-BUTYLESTER 75302-98-6 C25H26ClNO6
2-ETHYLHEXYLGLUCOPYRANOSIDE 2-ETHYLHEXYLGLUCOPYRANOSIDE 125590-73-0 C14H28O6
methyl (2R)-2-amino-3-(1H-indol-3-yl)propanoate methyl (2R)-2-amino-3-(1H-indol-3-yl)propanoate 22032-65-1 C12H14N2O2
(5-BENZYLIDENE-4-OXO-2-THIOXO-THIAZOLIDIN-3-YL)-ACETIC ACID (5-BENZYLIDENE-4-OXO-2-THIOXO-THIAZOLIDIN-3-YL)-ACETIC ACID 82159-06-6 C12H9NO3S2
3-NITROPHENYLACETYLENE 3-NITROPHENYLACETYLENE 3034-94-4 C8H5NO2
3-(4-Methylimidazol-1-yl)-5-trifluoromethylbenzoic acid 3-(4-Methylimidazol-1-yl)-5-trifluoromethylbenzoic acid 641571-13-3 C12H9F3N2O2
3-Morpholinopropyl bromide 3-Morpholinopropyl bromide 125422-83-5 C7H14BrNO
7-Phenyl-acetamido-deacetoxy-cephalosporanic-acid 7-Phenyl-acetamido-deacetoxy-cephalosporanic-acid 27255-72-7 C16H16N2O4S
O-PROPIONYLBENZOIC ACID O-PROPIONYLBENZOIC ACID 2360-45-4 C10H10O3
3-METHOXY-L-TYROSINE 3-METHOXY-L-TYROSINE 300-48-1 C10H13NO4
(4S-cis)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid 1,1-Dimethylethyl Ester (4S-cis)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid 1,1-Dimethylethyl Ester 196085-85-5 C14H23NO4
Triacetyl Aloe-emodin (Impurity A) Triacetyl Aloe-emodin (Impurity A) 25395-11-3 C21H16O8
2,4'-Diamino[sulfonylbisbenzene] 2,4'-Diamino[sulfonylbisbenzene] 27147-69-9 C12H12N2O2S
2-P-TOLYLOXYMETHYL-OXIRANE 2-P-TOLYLOXYMETHYL-OXIRANE 2186-24-5 C10H12O2
3-Hydroxyazobenzene 3-Hydroxyazobenzene 2437-11-8
Astragalin 7-O-β-D-glucopyranoside Astragalin 7-O-β-D-glucopyranoside 25615-14-9 C27H30O16
4-(5-CHLORO-2-THIENYL)-1,3-THIAZOL-2-AMINE 4-(5-CHLORO-2-THIENYL)-1,3-THIAZOL-2-AMINE 123971-45-9 C7H5ClN2S2
α,α-Dibromo-o-tolunitrile α,α-Dibromo-o-tolunitrile 655-63-0 C8H5Br2N
7-CHLORO-1-ETHYL-6-FLUORO-4-OXO-1,4-DIHYDRO-[1,8]NAPHTHYRIDINE-3-CARBOXYLIC ACID 7-CHLORO-1-ETHYL-6-FLUORO-4-OXO-1,4-DIHYDRO-[1,8]NAPHTHYRIDINE-3-CARBOXYLIC ACID 79286-73-0 C11H8ClFN2O3
HYDRIDE-L HYDRIDE-L 41639-74-1 C18H22O4
2-Amino-4-trifluoromethoxybenzothiazole 2-Amino-4-trifluoromethoxybenzothiazole 235101-36-7 C8H5F3N2OS
7-[(4S)-4-Amino-6-azaspiro[2.4]heptan-6-yl]-8-chloro-6-fluoro-1-[(1R,2S)-2-fluorocyclopropyl]-4-oxoquinoline-3-carboxylic acid 7-[(4S)-4-Amino-6-azaspiro[2.4]heptan-6-yl]-8-chloro-6-fluoro-1-[(1R,2S)-2-fluorocyclopropyl]-4-oxoquinoline-3-carboxylic acid 127254-10-8 C19H18ClF2N3O3
Sitagliptin Carbamoyl -D-Glucuronide Sitagliptin Carbamoyl -D-Glucuronide 940002-59-5 C23H23F6N5O9
5-Hydroxy Desloratadine 5-Hydroxy Desloratadine 117811-12-8 C19H19ClN2O
O-Benzyl Posaconazole O-Benzyl Posaconazole 170985-86-1 C44H48F2N8O4
10-trans-Atorvastatin Acetonide tert-Butyl Ester 10-trans-Atorvastatin Acetonide tert-Butyl Ester 1105067-90-0 C40H47FN2O5
3-Bromo Carbidopa 3-Bromo Carbidopa 1246819-09-9 C10H13BrN2O4
(4S,6R)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid tert-Butyl Ester (4S,6R)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid tert-Butyl Ester 186508-95-2 C14H23NO4
(5R)-6-Cyano-5-hydroxy-3-oxo-hexanoic Acid tert-Butyl Ester (5R)-6-Cyano-5-hydroxy-3-oxo-hexanoic Acid tert-Butyl Ester 125988-01-4 C11H17NO4
(4-Carboxy-3-ethoxy)phenyl Acetic Acid (Repaglinide Impurity) (4-Carboxy-3-ethoxy)phenyl Acetic Acid (Repaglinide Impurity) 220438-80-2 C11H12O5
2-Chloromethyl-3,5-dimethylpyridin-4-ol 2-Chloromethyl-3,5-dimethylpyridin-4-ol 220771-03-9 C8H10ClNO
(3S,5R)-6-Cyano-3,5-dihydroxy-hexanoic Acid tert-Butyl Ester (3S,5R)-6-Cyano-3,5-dihydroxy-hexanoic Acid tert-Butyl Ester 186508-94-1 C11H19NO4
2-Methyl-6-[(4-methylphenyl)sulfonyl]-1,4,5,6-tetrahydroimidazo[4,5-d][1]benzazepine 2-Methyl-6-[(4-methylphenyl)sulfonyl]-1,4,5,6-tetrahydroimidazo[4,5-d][1]benzazepine 717917-14-1 C19H19N3O2S
(1R-4S)-4-[[(1,1-dimethylethoxy)carbonyl]amino]- 2-Cyclopentene-1-carboxylic acid methyl ester (1R-4S)-4-[[(1,1-dimethylethoxy)carbonyl]amino]- 2-Cyclopentene-1-carboxylic acid methyl ester 251326-99-5 C12H19NO4
O-Isobutyryl (R)-Fesoterodine O-Isobutyryl (R)-Fesoterodine 1208313-13-6 C30H43NO4
Isopropyl Itraconazole Isopropyl Itraconazole 89848-49-7 C34H36Cl2N8O4
(R)-(-)-Ibuprofen-d3 (R)-(-)-Ibuprofen-d3 121702-86-1 C13H18O2
(S,R,S,S)-Orlistat (S,R,S,S)-Orlistat 111466-63-8 C29H53NO5
N-Trityl Candesartan Ethyl Ester N-Trityl Candesartan Ethyl Ester 856414-35-2 C45H38N6O3
3R,4S-4-(4-methoxyphenyl)-1-methylpiperi dinyl] methanol 3R,4S-4-(4-methoxyphenyl)-1-methylpiperi dinyl] methanol 127017-78-1 C14H21NO2
6H-Purin-6-one, 2-amino-1,9-dihydro-9-[(1R,3S,4R)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]- 6H-Purin-6-one, 2-amino-1,9-dihydro-9-[(1R,3S,4R)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]- 188399-46-4 C12H15N5O3
4,4'-(2-HYDROXY-1,3-PROPANDIYLDIOXY)BIS(2-PHENYLACETAMIDE) 4,4'-(2-HYDROXY-1,3-PROPANDIYLDIOXY)BIS(2-PHENYLACETAMIDE) 141650-31-9 C19H22N2O5
Valsartan cyano analog methyl ester Valsartan cyano analog methyl ester 137863-90-2 C25H30N2O3
(8S)-2-BroMo α-Ergocryptine (8S)-2-BroMo α-Ergocryptine 65700-36-9 C32H40BrN5O5
3-[4-(4-Chlorobenzoyl)phenoxy]-2-butanone (Fenofibrate IMpurity) 3-[4-(4-Chlorobenzoyl)phenoxy]-2-butanone (Fenofibrate IMpurity) 217636-47-0 C17H15ClO3
5-(2-Chlorobenzyl)-thieno[3,2-c]pyridiniuM Chloride 5-(2-Chlorobenzyl)-thieno[3,2-c]pyridiniuM Chloride 53885-64-6 C14H11Cl2NS
ClarithroMycin 9-OxiMe ClarithroMycin 9-OxiMe 103450-87-9 C38H70N2O13
Desloratadine N-Hydroxypiperidine Desloratadine N-Hydroxypiperidine 1193725-73-3 C19H19ClN2O
O-DesMethyl Venlafaxine Cyclic IMpurity O-DesMethyl Venlafaxine Cyclic IMpurity 1346601-55-5 C16H23NO2
rac-cis-2,3-Dichloro Sertraline Hydrochloride rac-cis-2,3-Dichloro Sertraline Hydrochloride 1198084-29-5 C17H18Cl3N
11β-Hydroperoxy Dienogest 11β-Hydroperoxy Dienogest 106111-43-7 C20H25NO4
2'-Nor ThiaMine 2'-Nor ThiaMine 7770-93-6 C11H15ClN4OS
6α-Methyl Hydrocortisone 21-Acetate 6α-Methyl Hydrocortisone 21-Acetate 1625-11-2 C24H34O6
piperacillinylaMpicillin piperacillinylaMpicillin
Celecoxib iMpurity-B Celecoxib iMpurity-B
EMtricitabine iMpurity B EMtricitabine iMpurity B
(S,S)-1,7-diazatricyclo[7.3.0.07,11]dodecane-2,6,8,12-tetrone (S,S)-1,7-diazatricyclo[7.3.0.07,11]dodecane-2,6,8,12-tetrone 14842-41-2 C10H10N2O4
1-Hydroxy-7-Methoxy-1,2,3,4-tetrahydronaphthalene 1-Hydroxy-7-Methoxy-1,2,3,4-tetrahydronaphthalene 32820-10-3 C11H14O2
BroMhexine Hydrochloride iMpurity DN-(2-AMino-5-broMobenzyl)-N-MethylcyclohexanaMine Dihydrochloride BroMhexine Hydrochloride iMpurity DN-(2-AMino-5-broMobenzyl)-N-MethylcyclohexanaMine Dihydrochloride 132004-28-5 C14H21BrN2
2-(DiMethylcarbaMoyl)benzoic acid, 97% 2-(DiMethylcarbaMoyl)benzoic acid, 97% 20320-37-0 C10H11NO3
RAC DESMETHYL CITALOPRAM HYDROCHLORIDE RAC DESMETHYL CITALOPRAM HYDROCHLORIDE 97743-99-2 C19H19FN2O
rac-3-Oxo Atorvastatin SodiuM Salt rac-3-Oxo Atorvastatin SodiuM Salt 1391052-00-8 C33H34FN2NaO5
2-Demethoxy-4-methoxy urapidil 2-Demethoxy-4-methoxy urapidil 34661-79-5 C20H29N5O3
Ribavirin IMpurity F Ribavirin IMpurity F 58151-87-4 C10H14N4O6
4-[-((-((4-(5-(Bis(2-hydroxyethyl)aMino)-1-Methyl-1H-benzo[d]iMidazol-2-yl)butanoyl)oxy)ethyl)(2-hydroxyethyl)aMino)-1-Methyl-1H-benzo[d]iMidazol-2-yl)butanic Acid 4-[-((-((4-(5-(Bis(2-hydroxyethyl)aMino)-1-Methyl-1H-benzo[d]iMidazol-2-yl)butanoyl)oxy)ethyl)(2-hydroxyethyl)aMino)-1-Methyl-1H-benzo[d]iMidazol-2-yl)butanic Acid 1228551-91-4 C32H41Cl3N6O4
3-(6,7-Dihydro-2-Methyl-7-oxo-3-propyl-2H-pyrazolo[4,3-d]pyriMidin-5-yl)-4-ethoxy-benzenesulfonyl Chloride 3-(6,7-Dihydro-2-Methyl-7-oxo-3-propyl-2H-pyrazolo[4,3-d]pyriMidin-5-yl)-4-ethoxy-benzenesulfonyl Chloride 501120-42-9 C17H19ClN4O4S
(3R,4S)-rel-3-[(1,3-Benzodioxol-5-yloxy)Methyl]-4-(4'-fluoro[1,1'-biphenyl]-4-yl)-piperidine Hydrochloride (3R,4S)-rel-3-[(1,3-Benzodioxol-5-yloxy)Methyl]-4-(4'-fluoro[1,1'-biphenyl]-4-yl)-piperidine Hydrochloride 1217655-87-2 C25H25ClFNO3
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