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Pharmaceutical Impurity Reference Standards
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- Structure:
- Chemical Name:
- 4-(5-CHLORO-2-THIENYL)-1,3-THIAZOL-2-AMINE
- CAS:
- 123971-45-9
- MF:
- C7H5ClN2S2
- Structure:
- Chemical Name:
- α,α-Dibromo-o-tolunitrile
- CAS:
- 655-63-0
- MF:
- C8H5Br2N
- Structure:
- Chemical Name:
- 7-CHLORO-1-ETHYL-6-FLUORO-4-OXO-1,4-DIHYDRO-[1,8]NAPHTHYRIDINE-3-CARBOXYLIC ACID
- CAS:
- 79286-73-0
- MF:
- C11H8ClFN2O3
- Structure:
- Chemical Name:
- HYDRIDE-L
- CAS:
- 41639-74-1
- MF:
- C18H22O4
- Structure:
- Chemical Name:
- 2-Amino-4-trifluoromethoxybenzothiazole
- CAS:
- 235101-36-7
- MF:
- C8H5F3N2OS
- Structure:
- Chemical Name:
- 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
- CAS:
- 127254-10-8
- MF:
- C19H18ClF2N3O3
- Structure:
- Chemical Name:
- Sitagliptin Carbamoyl -D-Glucuronide
- CAS:
- 940002-59-5
- MF:
- C23H23F6N5O9
- Structure:
- Chemical Name:
- 5-Hydroxy Desloratadine
- CAS:
- 117811-12-8
- MF:
- C19H19ClN2O
- Chemical Name:
- N-(2-((4-amino-6-(3-amino-5-fluorophenyl)pyrimidin-5-yl)oxy)ethyl)-N-methylacrylamide
- Structure:
- Chemical Name:
- (E)-Olopatadine
- CAS:
- 113806-06-7
- MF:
- C21H23NO3
- Structure:
- Chemical Name:
- NeMadipine B
- CAS:
- 79925-38-5
- MF:
- C19H21Cl2NO4
- Structure:
- Chemical Name:
- N-[(3,4-DiMethoxy-2-pyridinyl)Methyl] Pantoprazole
- CAS:
- 957470-59-6
- MF:
- C24H24F2N4O6S
- Structure:
- Chemical Name:
- 4-Epi-6-epi Doxycycline
- CAS:
- 97583-08-9
- MF:
- C22H24N2O8
- Structure:
- Chemical Name:
- Ethyl 3,4-O-Isopropylidene-5-O-methanesulfonylshikimate
- CAS:
- 204254-84-2
- MF:
- C13H20O7S
- Structure:
- Chemical Name:
- 2-PyrazinecarboxaMide, N,N',N''-[2,4,6-boroxintriyltris[[(1R)-3-Methylbutylidene]iMino[(1S)-2-oxo-1-(phenylMethyl)-2,1-ethanediyl]]]tris-
- CAS:
- 390800-88-1
- MF:
- C57H69B3N12O9
- Structure:
- Chemical Name:
- D-hydroxyphenylglycylamoxicillin)
- CAS:
- 188112-75-6
- MF:
- C24H26N4O7S
- Structure:
- Chemical Name:
- (1R)-2-chloro-1-(3,4-difluorophenyl)-1-ethanol
- CAS:
- 1212376-05-0
- MF:
- C8H7ClF2O
- Structure:
- Chemical Name:
- 2-[[(3aR,4S,6R,6aS)-6-[7-Chloro-5-(propylthio)-3H-1,2,3-triazolo[4,5-d]pyrimidin-3-yl]tetrahydro-2,2-dimethyl-4H-cyclopenta-1,3-dioxol-4-yl]oxy]-ethanol
- CAS:
- 376608-75-2
- MF:
- C17H24ClN5O4S
- Structure:
- Chemical Name:
- riboflavin 3',5'-bisphosphate
- CAS:
- 86108-26-1
- MF:
- C17H22N4O12P2
- Structure:
- Chemical Name:
- 6 beta-hydroxycortisol
- CAS:
- 53-35-0
- MF:
- C21H30O6
- Structure:
- Chemical Name:
- Fluconazole IMpurity F
- MF:
- C13H12F2N6O
- Structure:
- Chemical Name:
- Erlotinib IMpurity A
- CAS:
- 1058132-82-3
- MF:
- C22H25N3O4
- Chemical Name:
- Apixaban iMpurity 5
- Structure:
- Chemical Name:
- cefaclor iMpurity C
- CAS:
- 143059-69-2
- MF:
- C15H14ClN3O4S
- Chemical Name:
- ceftazidiMe iMpurity B
- CAS:
- 1236700-64-3
- Structure:
- Chemical Name:
- pidotiMod iMpurity D
- CAS:
- 162148-15-4
- MF:
- C9H12N2O4S
- Structure:
- Chemical Name:
- Irinotecan Hydroxyl Acid
- CAS:
- 142677-15-4
- MF:
- C22H22N2O6
- Structure:
- Chemical Name:
- CyclopropanaMine, 2-(4-fluorophenyl)-(hydrochloride)(1:1),(1R,2S)-
- CAS:
- 1314324-00-9
- MF:
- C9H11ClFN
- Structure:
- Chemical Name:
- (1S,2S,3R,5S)-3-(7-(((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)aMino)-5-(propylsulfinyl)-3H-[1,2,3]triazolo[4,5-d]pyriMidin-3-yl)-5-(2-hydroxyethoxy)cyclopentane-1,2-diol
- CAS:
- 1644461-85-7
- MF:
- C23H28F2N6O5S
- Chemical Name:
- AtracuriuM IMpurity C (Mixture of DiastereoMers)
- CAS:
- 86293-35-8
- Chemical Name:
- AtracuriuM IMpurity E (cis-Quaternary Acid)
- Chemical Name:
- AztreonaM IMpurity B
- Chemical Name:
- Ceftriaxone IMpurit E
- Structure:
- Chemical Name:
- Cetirizine IMpurity-6
- MF:
- C21H25ClN2O3
- Structure:
- Chemical Name:
- Cinacalcet IMpurity 10
- CAS:
- 1809324-40-0
- MF:
- C29H28F3NO2S
- Chemical Name:
- Dasatinib IMpurity 5
- Structure:
- Chemical Name:
- Diacerein IMpurity F
- CAS:
- 13928-72-8
- MF:
- C35H36O16
- Structure:
- Chemical Name:
- D-Valganciclovir Hydrochloride
- CAS:
- 1393911-57-3
- MF:
- C14H23ClN6O5
- Chemical Name:
- Entecavir IMpurity E
- Structure:
- Chemical Name:
- EzetiMibe IMpurity 1
- CAS:
- 190595-66-5
- MF:
- C24H22FNO3
- Structure:
- Chemical Name:
- Flurbiprofen IMpurity B
- CAS:
- 1797883-74-9
- MF:
- C18H17FO4
- Chemical Name:
- IMatinib DiPiperidine IMpurity
- Chemical Name:
- levocetirizine IMpurity
- Chemical Name:
- OseltaMivir IMpurity F
- Chemical Name:
- RocuroniuM BroMide IMpurity 19
- Structure:
- Chemical Name:
- S-(+)-O-DesMethyl-Venlafaxine-d6
- CAS:
- 1062609-99-7
- MF:
- C16H25NO2
- Structure:
- Chemical Name:
- SalMeterol IMpurity F
- MF:
- C25H37NO4
- Structure:
- Chemical Name:
- Sitagliptin Defuoro IMpurity 4
- CAS:
- 486459-98-7
- MF:
- C15H19F2NO4
- Chemical Name:
- Sulpiride IMpurity F
- Structure:
- Chemical Name:
- trans-Ibuprofen IMpurity G
- CAS:
- 1391054-15-1
- MF:
- C26H32O4
- Structure:
- Chemical Name:
- EthanediaMide iMpurity F
- CAS:
- 480452-37-7
- MF:
- C16H22ClN5O3
- Chemical Name:
- Paroxetine IMpurity
- CAS:
- 105813-23-8
- Structure:
- Chemical Name:
- 7-[(2-aMinoethyl)aMino] -1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid
- MF:
- C14H16FN3O3
- Structure:
- Chemical Name:
- (S)-(1R,3s,5S)-8-Methyl-8-azabicyclo[3.2.1]oct-6-en-3-yl 3-hydroxy-2-phenylpropanoate
- CAS:
- 61616-97-5
- MF:
- C17H21NO3
- Structure:
- Chemical Name:
- L-erythro-3-(3,4-Dihydroxyphenyl)serine
- CAS:
- 34047-62-6
- MF:
- C9H11NO5
- Structure:
- Chemical Name:
- ethylmethylglycinexylidide
- CAS:
- 74634-66-5
- MF:
- C13H20N2O
- Structure:
- Chemical Name:
- 16-hydroxyclarithromycin
- CAS:
- 124412-58-4
- MF:
- C38H69NO14
- Structure:
- Chemical Name:
- 4-METHYL-3-[[1-OXO-2-(PROPYLAMINO)PROPYL]AMINO]-2-THIOPHENECARBOXYLIC ACID
- CAS:
- 114176-52-2
- MF:
- C12H18N2O3S
- Structure:
- Chemical Name:
- (5-BENZYLIDENE-4-OXO-2-THIOXO-THIAZOLIDIN-3-YL)-ACETIC ACID
- CAS:
- 82159-06-6
- MF:
- C12H9NO3S2
- Structure:
- Chemical Name:
- 3-NITROPHENYLACETYLENE
- CAS:
- 3034-94-4
- MF:
- C8H5NO2
- Structure:
- Chemical Name:
- Amlodipine Impurity 27
- CAS:
- 2832589-38-3
- MF:
- C26H29ClN2O7S
- Structure:
- Chemical Name:
- 3-(4-Methylimidazol-1-yl)-5-trifluoromethylbenzoic acid
- CAS:
- 641571-13-3
- MF:
- C12H9F3N2O2
- Structure:
- Chemical Name:
- 3-Morpholinopropyl bromide
- CAS:
- 125422-83-5
- MF:
- C7H14BrNO
- Structure:
- Chemical Name:
- 7-Phenyl-acetamido-deacetoxy-cephalosporanic-acid
- CAS:
- 27255-72-7
- MF:
- C16H16N2O4S
- Structure:
- Chemical Name:
- O-PROPIONYLBENZOIC ACID
- CAS:
- 2360-45-4
- MF:
- C10H10O3
- Structure:
- Chemical Name:
- 3-METHOXY-L-TYROSINE
- CAS:
- 300-48-1
- MF:
- C10H13NO4
- Structure:
- Chemical Name:
- (4S-cis)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid 1,1-Dimethylethyl Ester
- CAS:
- 196085-85-5
- MF:
- C14H23NO4
- Structure:
- Chemical Name:
- Triacetyl Aloe-emodin (Impurity A)
- CAS:
- 25395-11-3
- MF:
- C21H16O8
- Structure:
- Chemical Name:
- 3-bromo-5-((1-((4-methyl-5-oxo-4,5-dihydro-1H-1,2,4-triazol-3-yl) methyl)-2-oxo-4-(trifluoromethyl)-1,2-dihydropyridin-3-yl)oxy) benzonitrile
- CAS:
- 2994626-87-6
- MF:
- C17H11BrF3N5O3
- Structure:
- Chemical Name:
- O-Benzyl Posaconazole
- CAS:
- 170985-86-1
- MF:
- C44H48F2N8O4
- Structure:
- Chemical Name:
- 10-trans-Atorvastatin Acetonide tert-Butyl Ester
- CAS:
- 1105067-90-0
- MF:
- C40H47FN2O5
- Structure:
- Chemical Name:
- 3-Bromo Carbidopa
- CAS:
- 1246819-09-9
- MF:
- C10H13BrN2O4
- Structure:
- Chemical Name:
- (4S,6R)-6-(Cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic Acid tert-Butyl Ester
- CAS:
- 186508-95-2
- MF:
- C14H23NO4
- Structure:
- Chemical Name:
- (5R)-6-Cyano-5-hydroxy-3-oxo-hexanoic Acid tert-Butyl Ester
- CAS:
- 125988-01-4
- MF:
- C11H17NO4
- Structure:
- Chemical Name:
- (4-Carboxy-3-ethoxy)phenyl Acetic Acid (Repaglinide Impurity)
- CAS:
- 220438-80-2
- MF:
- C11H12O5
- Structure:
- Chemical Name:
- 2-Chloromethyl-3,5-dimethylpyridin-4-ol
- CAS:
- 220771-03-9
- MF:
- C8H10ClNO
- Structure:
- Chemical Name:
- (3S,5R)-6-Cyano-3,5-dihydroxy-hexanoic Acid tert-Butyl Ester
- CAS:
- 186508-94-1
- MF:
- C11H19NO4
- Structure:
- Chemical Name:
- 2-Methyl-6-[(4-methylphenyl)sulfonyl]-1,4,5,6-tetrahydroimidazo[4,5-d][1]benzazepine
- CAS:
- 717917-14-1
- MF:
- C19H19N3O2S
- Structure:
- Chemical Name:
- (1R-4S)-4-[[(1,1-dimethylethoxy)carbonyl]amino]- 2-Cyclopentene-1-carboxylic acid methyl ester
- CAS:
- 251326-99-5
- MF:
- C12H19NO4
- Structure:
- Chemical Name:
- O-Isobutyryl (R)-Fesoterodine
- CAS:
- 1208313-13-6
- MF:
- C30H43NO4
- Structure:
- Chemical Name:
- Isopropyl Itraconazole
- CAS:
- 89848-49-7
- MF:
- C34H36Cl2N8O4
- Structure:
- Chemical Name:
- (R)-(-)-Ibuprofen-d3
- CAS:
- 121702-86-1
- MF:
- C13H18O2
- Structure:
- Chemical Name:
- (S,R,S,S)-Orlistat
- CAS:
- 111466-63-8
- MF:
- C29H53NO5
- Structure:
- Chemical Name:
- N-Trityl Candesartan Ethyl Ester
- CAS:
- 856414-35-2
- MF:
- C45H38N6O3
- Structure:
- Chemical Name:
- 3R,4S-4-(4-methoxyphenyl)-1-methylpiperi dinyl] methanol
- CAS:
- 127017-78-1
- MF:
- C14H21NO2
- Structure:
- Chemical Name:
- 6H-Purin-6-one, 2-amino-1,9-dihydro-9-[(1R,3S,4R)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-
- CAS:
- 188399-46-4
- MF:
- C12H15N5O3
- Structure:
- Chemical Name:
- 4,4'-(2-HYDROXY-1,3-PROPANDIYLDIOXY)BIS(2-PHENYLACETAMIDE)
- CAS:
- 141650-31-9
- MF:
- C19H22N2O5
- Structure:
- Chemical Name:
- Valsartan cyano analog methyl ester
- CAS:
- 137863-90-2
- MF:
- C25H30N2O3
- Structure:
- Chemical Name:
- (8S)-2-BroMo α-Ergocryptine
- CAS:
- 65700-36-9
- MF:
- C32H40BrN5O5
- Structure:
- Chemical Name:
- 3-[4-(4-Chlorobenzoyl)phenoxy]-2-butanone (Fenofibrate IMpurity)
- CAS:
- 217636-47-0
- MF:
- C17H15ClO3
- Structure:
- Chemical Name:
- 5-(2-Chlorobenzyl)-thieno[3,2-c]pyridiniuM Chloride
- CAS:
- 53885-64-6
- MF:
- C14H11Cl2NS
- Structure:
- Chemical Name:
- ClarithroMycin 9-OxiMe
- CAS:
- 103450-87-9
- MF:
- C38H70N2O13
- Structure:
- Chemical Name:
- Desloratadine N-Hydroxypiperidine
- CAS:
- 1193725-73-3
- MF:
- C19H19ClN2O
- Structure:
- Chemical Name:
- O-DesMethyl Venlafaxine Cyclic IMpurity
- CAS:
- 1346601-55-5
- MF:
- C16H23NO2
- Structure:
- Chemical Name:
- rac-cis-2,3-Dichloro Sertraline Hydrochloride
- CAS:
- 1198084-29-5
- MF:
- C17H18Cl3N
- Structure:
- Chemical Name:
- 11β-Hydroperoxy Dienogest
- CAS:
- 106111-43-7
- MF:
- C20H25NO4
- Structure:
- Chemical Name:
- 2'-Nor ThiaMine
- CAS:
- 7770-93-6
- MF:
- C11H15ClN4OS
- Structure:
- Chemical Name:
- 6α-Methyl Hydrocortisone 21-Acetate
- CAS:
- 1625-11-2
- MF:
- C24H34O6
- Chemical Name:
- piperacillinylaMpicillin
- Chemical Name:
- Celecoxib iMpurity-B