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Pharmaceutical Impurity Reference Standards
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- Structure:
- Chemical Name:
- Ceftazidime EP Impurity D
- CAS:
- 73547-69-0
- MF:
- C45H44N6O7S2
- Structure:
- Chemical Name:
- Nicergoline EP Impurity G
- CAS:
- 57935-65-6
- MF:
- C23H24BrN3O2
- Structure:
- Chemical Name:
- Benzenesulfonamide, 4-[5-(4-methylphenyl)-2-oxido-3-(trifluoromethyl)-1H-pyrazol-1-yl]-
- CAS:
- 2356153-95-0
- MF:
- C17H14F3N3O3S
- Structure:
- Chemical Name:
- 2-Pyrrolidinecarbonitrile, 1-(2-aminoacetyl)-, hydrochloride (1:1), (2S)-
- CAS:
- 913980-23-1
- MF:
- C7H12ClN3O
- Structure:
- Chemical Name:
- Lamivudine Impurity 7
- CAS:
- 147126-63-4
- MF:
- C14H24O4S
- Structure:
- Chemical Name:
- EsCitalopram EP Impurity I
- CAS:
- 1370643-22-3
- MF:
- C20H21FN2O
- Structure:
- Chemical Name:
- (trans)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-methoxyphenyl)-1-methylpiperidine
- CAS:
- 127017-42-9
- MF:
- C21H25NO4
- Structure:
- Chemical Name:
- Methylprednisolone Impurity 21
- CAS:
- 150899-33-5
- MF:
- C22H28O4
- Structure:
- Chemical Name:
- Epinephrine Impurity 7
- CAS:
- 62322-82-1
- MF:
- C9H11NO3
- Structure:
- Chemical Name:
- (trans)-4-((2-amino-4,6-dibromobenzyl)amino)cyclohexanol
- MF:
- C13H18Br2N2O
- Chemical Name:
- Fesoterodine Impurity 14
- Chemical Name:
- Dexamethasone EP impurities E
- Structure:
- Chemical Name:
- (R)-N-((S)-2-aminobutanoyl)-3-(bromomethyl)hexanamide
- MF:
- C11H21BrN2O2
- Chemical Name:
- Empagliflozin Impurity 57（R,R）
- Structure:
- Chemical Name:
- Azacitidine Impurity 37
- CAS:
- 206269-46-7
- MF:
- C8H12N4O5
- Chemical Name:
- Aripiprazole peroxide degradation Impurity (MW:303Da)
- Chemical Name:
- NA
- Chemical Name:
- 2,2'-(4,10-bis((trans)-1,3,4-trihydroxybutan-2-yl)-1,4,7,10-tetraazacyclododecane-1,7-diyl)diacetic acid Gd3+
- Structure:
- Chemical Name:
- N1-Losartanyl-losartan (Losartan IMpurity)
- CAS:
- 230971-71-8
- MF:
- C44H44Cl2N12O
- Structure:
- Chemical Name:
- N2-Losartanyl-losartan (Losartan IMpurity)
- CAS:
- 230971-72-9
- MF:
- C44H44Cl2N12O
- Structure:
- Chemical Name:
- N-Ethoxycarbonyl 7-ADCA
- CAS:
- 72820-16-7
- MF:
- C11H14N2O5S
- Chemical Name:
- AlviMopan iMpurity
- Chemical Name:
- Caspofungin iMpurity
- Structure:
- Chemical Name:
- Saxagliptin iMpurity
- CAS:
- 2173146-35-3
- MF:
- C18H24ClN3O2
- Structure:
- Chemical Name:
- PD 312237
- CAS:
- 501666-23-5
- MF:
- C20H35NO11
- Structure:
- Chemical Name:
- (1R,5S,6S)-rel-5-(1-Ethylpropoxy)-7-oxabicyclo[4.1.0]hept-3-ene-3-carboxylic Acid Methyl Ester
- CAS:
- 1234858-94-6
- MF:
- C13H20O4
- Structure:
- Chemical Name:
- AlMotriptan Related CoMpound B
- CAS:
- 1246860-65-0
- MF:
- C19H25N3O6S
- Chemical Name:
- Benazepril Related CoMpound B
- Structure:
- Chemical Name:
- IMatinib iMpurity
- CAS:
- 152459-96-6
- MF:
- C24H21N5O
- Structure:
- Chemical Name:
- (2R,3R,4R,5S,6R)-2-(acetoxyMethyl)-6-(3-((5-(4-fluorophenyl)thiophen-2-yl)Methyl)-4-Methylphenyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate
- MF:
- C32H33FO9S
- Structure:
- Chemical Name:
- 1,2-BenzenedicarboxaMide, N1,N2-bis[[(5S)-2-oxo-3-[4-(3-oxo-4-Morpholinyl)phenyl]-5-oxazolidinyl]Methyl]-
- CAS:
- 1365267-36-2
- MF:
- C36H36N6O10
- Structure:
- Chemical Name:
- 2-QuinazolineMethanol, 4-Methyl-
- CAS:
- 13535-91-6
- MF:
- C10H10N2O
- Structure:
- Chemical Name:
- 5-(2,2-diMethyl-4H-benzo[d][1,3]dioxin-6-yl)oxazolidin-2-one
- CAS:
- 452340-96-4
- MF:
- C13H15NO4
- Structure:
- Chemical Name:
- alpha-(Dimethylaminomethyl)-alpha-ethylbenzyl alcohol hydrochloride
- CAS:
- 104743-23-9
- MF:
- C12H20ClNO
- Structure:
- Chemical Name:
- N-[6,9-Dihydro-6-oxo-9-[[2-(1-oxopropoxy)-1-[(1-oxopropoxy)methyl]ethoxy]methyl]-1H-purin-2-yl]propanamide
- CAS:
- 177216-32-9
- MF:
- C18H25N5O7
- Structure:
- Chemical Name:
- 5-Bromo-1-(4-fluorophenyl)-1,3-dihydro-N,N-dimethyl-1-isobenzofuranpropanamine ethanedioate (1:1)
- CAS:
- 64372-43-6
- MF:
- C21H23BrFNO5
- Structure:
- Chemical Name:
- (E)-2-Methyl-4-(4-(2-Methyl-5,10-dihydro-4H-benzo[b]thieno[2,3-e][1,4]diazepin-4-yl)piperazin-1-yl)-10H-benzo[b]thieno[2,3-e][1,4]diazepine
- CAS:
- 1070876-09-3
- MF:
- C28H26N6S2
- Structure:
- Chemical Name:
- (1S,2S,3R,5S)-PinanediolN-BOC-L-phenylalanine-L-leucine boronate
- CAS:
- 1187479-72-6
- MF:
- C29H45BN2O5
- Structure:
- Chemical Name:
- Posaconazole iMpurity 7
- CAS:
- 2180759-84-4
- MF:
- C37H42F2N8O4
- Structure:
- Chemical Name:
- Intedanib Impurity
- CAS:
- 2243396-74-7
- MF:
- C31H32N6O6
- Structure:
- Chemical Name:
- 3-[4-(acetyloxymethyl)phenyl]-2-propenoic acid methyl ester
- CAS:
- 100688-45-7
- MF:
- C13H14O4
- Structure:
- Chemical Name:
- Acetaminophen Impurity 14
- CAS:
- 1991204-56-8
- MF:
- C16H18N2O2
- Structure:
- Chemical Name:
- Ketoconazole Impurity 7
- CAS:
- 172032-21-2
- MF:
- C11H12Cl2O3
- Chemical Name:
- Rosuvastatin Impurity 59
- Structure:
- Chemical Name:
- Losartan Impurity 12
- CAS:
- 727718-93-6
- MF:
- C22H22ClN9
- Structure:
- Chemical Name:
- benzyl (2S)-2-amino-3-(4-methanesulfonylphenyl)propanoate hydrochloride
- CAS:
- 1865726-28-8
- MF:
- C17H19NO4S
- Structure:
- Chemical Name:
- Glycopyrrolate Impurity 12
- CAS:
- 857353-41-4
- MF:
- C13H14O3
- Structure:
- Chemical Name:
- (4S,4aR,5R,12aS)-4-(dimethylamino)-3,5,10,11,12a-pentahydroxy-6-methyl-1,12-dioxo-1,4,4a,5,12,12a-hexahydrotetracene-2-carboxamide
- CAS:
- 4660-26-8
- MF:
- C22H22N2O8
- Chemical Name:
- Regorafenib Impurity 38
- Chemical Name:
- Cefazolin Impurity 28
- Chemical Name:
- NA
- Structure:
- Chemical Name:
- Acarbose Impurity IV (JP)
- MF:
- C13H21NO7
- Chemical Name:
- Vonoprazan Impurity 57
- Structure:
- Chemical Name:
- Tafluprost Impurity 9
- CAS:
- 2099033-66-4
- MF:
- C27H41NO8
- Structure:
- Chemical Name:
- ethylmethylglycinexylidide
- CAS:
- 74634-66-5
- MF:
- C13H20N2O
- Structure:
- Chemical Name:
- 4-PyridinecarboxaMide, N-(2,6-diMethylphenyl)-
- CAS:
- 68280-05-7
- MF:
- C14H14N2O
- Structure:
- Chemical Name:
- 4-N-Desacetyl-5-N-acetyl OseltaMivir
- CAS:
- 956267-10-0
- MF:
- C16H28N2O4
- Structure:
- Chemical Name:
- rac N-DesMethyl-N-(4-Methoxyphenethyl) Venlafaxine
- CAS:
- 1346601-14-6
- MF:
- C25H35NO3
- Structure:
- Chemical Name:
- 11-Keto Oxcarbazepine
- CAS:
- 537693-29-1
- MF:
- C15H10N2O3
- Structure:
- Chemical Name:
- Isopropyl 4-(3-AMinophenyl)-1,4-dihydro-5-(2-Methoxyethoxycarbonyl)-2,6-diMethylpyridine-3-carboxylate
- CAS:
- 155861-24-8
- MF:
- C21H28N2O5
- 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:
- Salmeterol Related Compound B (10 mg) (4-{1-Hydroxy-2-[6-(4-phenylbutan-2-yloxy)hexylamino]ethyl}-2-(hydroxymethyl)phenol)
- CAS:
- 108928-81-0
- MF:
- C25H37NO4
- Structure:
- Chemical Name:
- N-[3-[3-(1-Piperidinylmethyl)phenoxy]propyl]amine
- CAS:
- 73278-98-5
- MF:
- C15H24N2O
- Structure:
- Chemical Name:
- 7,10-Bis-O-(2,2,2-trichloroethoxycarbonyl)-10-deacetylbaccatin III
- CAS:
- 95603-44-4
- MF:
- C35H38Cl6O14
- Structure:
- Chemical Name:
- 4-(3-AMino-phenyl)-Morpholin-3-one
- CAS:
- 1082495-22-4
- MF:
- C10H12N2O2
- Structure:
- Chemical Name:
- 2-(DiethylaMino)-N-(2,3-diMethylphenyl)acetaMide Hydrochloride
- CAS:
- 857170-72-0
- MF:
- C14H23ClN2O
- Structure:
- Chemical Name:
- 4-Hydroxy Darunavir
- CAS:
- 313682-97-2
- MF:
- C27H37N3O8S
- Structure:
- Chemical Name:
- Deschloroaripiprazole
- CAS:
- 203395-81-7
- MF:
- C23H28ClN3O2
- Structure:
- Chemical Name:
- O-[(Guanin-9-yl)Methyl] Acyclovir
- CAS:
- 166762-90-9
- MF:
- C14H16N10O4
- Structure:
- Chemical Name:
- 3-(4-Carboethoxy)phenyl propanal
- CAS:
- 151864-81-2
- MF:
- C12H14O3
- Structure:
- Chemical Name:
- (2,6-Xylyloxy)acetyl Lopinavir
- CAS:
- 943250-65-5
- MF:
- C47H58N4O7
- Structure:
- Chemical Name:
- (S)-IsotiMolol (TiMolol IMpurity B)
- CAS:
- 158636-96-5
- MF:
- C13H24N4O3S
- Chemical Name:
- Afatinib IMpurity A
- Chemical Name:
- Afatinib IMpurity G
- Chemical Name:
- Articaine IMpurity F (Articaine Acid PropionaMide HCl)
- Structure:
- Chemical Name:
- Avanafil iMpurity 4
- CAS:
- 874482-97-0
- MF:
- C8H11Cl2NO
- Structure:
- Chemical Name:
- Clopidogrel IMpurity 4
- CAS:
- 801319-16-4
- MF:
- C15H14ClNO2S
- Structure:
- Chemical Name:
- Dehydro Azelnidipine
- CAS:
- 918659-10-6
- MF:
- C33H32N4O6
- Structure:
- Chemical Name:
- DiazepaM IMpurity F
- CAS:
- 31269-33-7
- MF:
- C16H13ClN2O
- Chemical Name:
- LaMotrigine IMpurity
- Structure:
- Chemical Name:
- Posaconazole DiastereoisoMer interMediate 5
- CAS:
- 149809-42-7
- MF:
- C21H21F2N3O4S
- Structure:
- Chemical Name:
- Prasugrel alpha-Hydroxy IMpurity
- CAS:
- 1100905-45-0
- MF:
- C11H11FO2
- Structure:
- Chemical Name:
- Solifenacin Related CoMpound 2 Succinate
- CAS:
- 1262506-09-1
- MF:
- C27H32N2O6
- Structure:
- Chemical Name:
- Tetrahydro FuroseMide
- CAS:
- 4793-38-8
- MF:
- C12H15ClN2O5S
- Structure:
- Chemical Name:
- 6-O-DesMethoxyethyl-6-O-chloroethyl Erlotinib Hydrochloride
- CAS:
- 183320-04-9
- MF:
- C21H21Cl2N3O3
- Structure:
- Chemical Name:
- Macitentan IMpurity
- CAS:
- 556796-88-4
- MF:
- C17H15Br2N5O4S
- Structure:
- Chemical Name:
- 4-((4-broMophenyl)(1H-1,2,4-triazol-1-yl)Methyl)benzonitrile
- CAS:
- 143030-54-0
- MF:
- C16H11BrN4
- Structure:
- Chemical Name:
- Acetic acid, 2-[2-[4-(diphenylMethyl)-1-piperazinyl]ethoxy]-
- CAS:
- 83881-53-2
- MF:
- C21H26N2O3
- Structure:
- Chemical Name:
- CHLORHEXIDENE DIACETATE IMPURITY A
- CAS:
- 152504-08-0
- MF:
- C16H24ClN9
- Chemical Name:
- AZITHROMYCIN IMPURITY A
- Chemical Name:
- Oseltamivir Impurity 94
- Chemical Name:
- Oseltamivir Impurity 82
- Chemical Name:
- Oseltamivir Impurity 74
- Structure:
- Chemical Name:
- Uridine, 5'-(2-methylpropanoate) (9CI)
- CAS:
- 886538-48-3
- MF:
- C13H18N2O7