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Pharmaceutical Impurity Reference Standards
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- Structure:
- Chemical Name:5-PyriMidinecarboxylic acid, 4-(4-fluorophenyl)-1,2-dihydro-6-(1-Methylethyl)-2-oxo-, Methyl ester
- CAS:488798-37-4
- MF:C15H15FN2O3
- Structure:
- Chemical Name:AgoMelatine DiMer Urea
- CAS:185421-27-6
- MF:C27H28N2O3
- Structure:
- Chemical Name:AgoMelatine DiMer Urea
- CAS:185421-27-6
- MF:C27H28N2O3
- Structure:
- Chemical Name:Isotachysterol3
- CAS:22350-43-2
- MF:C27H44O
- Structure:
- Chemical Name:Nitrendipine Propyl Ester
- CAS:225785-54-6
- MF:C19H22N2O6
- Structure:
- Chemical Name:O-DesMethyl Urapidil
- CAS:91453-03-1
- MF:C19H27N5O3
- Structure:
- Chemical Name:(1R,3R,4R)-Entecavir
- CAS:1367369-76-3
- MF:C12H15N5O3
- Structure:
- Chemical Name:5-(5-chloro-1-(2-fluorophenyl)-2-oxopentyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridin-2-yl acetate
- CAS:1056459-37-0
- MF:C20H21ClFNO3S
- Structure:
- Chemical Name:(2S,3R)-2-((S)-1-(3,5-bis(trifluoroMethyl)phenyl)ethoxy)-3-(4-fluorophenyl)Morpholine
- CAS:327623-37-0
- MF:C20H18F7NO2
- Structure:
- Chemical Name:Linagliptin iMpurity
- CAS:2140263-92-7
- MF:C25H28N8O2
- Structure:
- Chemical Name:1-(2-Fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carboxaMide
- CAS:256376-62-2
- MF:C14H11FN4O
- Structure:
- Chemical Name:Alogliptin iMpurity
- CAS:60271-06-9
- MF:C7H10N2O3
- Structure:
- Chemical Name:Alogliptin iMpurity
- CAS:60271-06-9
- MF:C7H10N2O3
- Structure:
- Chemical Name:cefaclor iMpurity H
- CAS:
- MF:C4H6N4O3S2
- Chemical Name:Tadalafil iMpurity E
- CAS:
- MF:
- Structure:
- Chemical Name:3,3',5-TRIIODOTHYROPROPIONIC ACID
- CAS:51-26-3
- MF:C15H11I3O4
- Structure:
- Chemical Name:Cytidine,N-benzoyl-2^-C-Methyl-,3^,5^-dibenzoate(9CI)
- CAS:863329-64-0
- MF:C31H27N3O8
- Structure:
- Chemical Name:(R)-2-((6-(3-((3-(2-cyanobenzyl)-1-Methyl-2,6-dioxo-1,2,3,6-tetrahydropyriMidin-4-yl)aMino)piperidin-1-yl)-3-Methyl-2,4-dioxo-3,4-dihydropyriMidin-1(2H)-yl)Methyl)benzonitrile
- CAS:1268836-55-0
- MF:C31H30N8O4
- Structure:
- Chemical Name:(R)-2-((6-(3-((3-(2-cyanobenzyl)-1-Methyl-2,6-dioxo-1,2,3,6-tetrahydropyriMidin-4-yl)aMino)piperidin-1-yl)-3-Methyl-2,4-dioxo-3,4-dihydropyriMidin-1(2H)-yl)Methyl)benzonitrile
- CAS:1268836-55-0
- MF:C31H30N8O4
- Structure:
- Chemical Name:1-Pyrrolidinecarboxylic acid, 4-oxo-2-(3-thiazolidinylcarbonyl)-, 1,1-diMethylethyl ester, (2R)-
- CAS:1415908-67-6
- MF:C13H20N2O4S
- Structure:
- Chemical Name:(2R,3S)-2-[(1R)-1-[3,5-Bis(trifluoroMethyl)phenyl]ethoxy]-3-(phenyl)Morpholine hydrochloride
- CAS:874460-46-5
- MF:C20H20ClF6NO2
- Chemical Name:AlMotriptan iMpurity
- CAS:
- MF:
- Chemical Name:AlMotriptan iMpurity
- CAS:
- MF:
- Structure:
- Chemical Name:FaMotidine iMpurity
- CAS:130463-35-3
- MF:C5H8N4S2.Na
- Chemical Name:Nitrendipine iMpurity
- CAS:
- MF:
- Structure:
- Chemical Name:TraMadol EP IMpurity-C
- CAS:66170-31-8
- MF:C16H24ClNO
- Structure:
- Chemical Name:Anastrozole IMpurity (3-(1-Cyano-1-Methylethyl)-alfa,alfa-diMethyl-5-(1H-,1,2,4-triazole-1-ylMethyl)-benzeneacetic acid)
- CAS:1338800-82-0
- MF:C17H20N4O2
- Structure:
- Chemical Name:Anastrozole IMpurity (3-(1-Cyano-1-Methylethyl)-alfa,alfa-diMethyl-5-(1H-,1,2,4-triazole-1-ylMethyl)-benzeneacetic acid)
- CAS:1338800-82-0
- MF:C17H20N4O2
- Chemical Name:AtracuriuM IMpurity K (Mixture of cis, trans, cis, cis(K1 & K2), tans, trans IsoMer)
- CAS:
- MF:
- Chemical Name:ChlorphenaMine IMpurity B
- CAS:
- MF:
- Structure:
- Chemical Name:Clozapine EP IMpurity D
- CAS:65514-71-8
- MF:C18H21ClN4O
- Chemical Name:Febuxostat IMpurity (2-(3-carboxy-4-isobutyloxyphenyl)-4-Methylthiazole-5-carboxylic acid)
- CAS:
- MF:
- Structure:
- Chemical Name:Fluconazole IMpurity I
- CAS:
- MF:C13H12F2N6O
- Structure:
- Chemical Name:IMidafenacin Related CoMpound 1 (4-(1H-IMidzol-1-yl)-2,2-DiphenylbutanaMide)
- CAS:170105-20-1
- MF:C19H19N3O
- Structure:
- Chemical Name:IMidafenacin Related CoMpound 6 (4-AcetiMidoylaMino-2,2-DiphenylbutanaMide)
- CAS:503598-33-2
- MF:C18H21N3O
- Structure:
- Chemical Name:Lansoprazole IMpurity H
- CAS:1346598-28-4
- MF:C23H16F3N5OS
- Structure:
- Chemical Name:LevetiracetaM IMurity (L-2-AMinobutanaMide HCl,S-2-AMinobutanaMide HCl)
- CAS:1933471-30-7
- MF:C8H14N2O3
- Chemical Name:Milrinone IMpurity 4
- CAS:
- MF:
- Structure:
- Chemical Name:Nebivolol O-Beta-D-Glucuronide
- CAS:1698091-61-0
- MF:C22H27NO4
- Chemical Name:Nicergoline IMp. C (EP)
- CAS:
- MF:
- Chemical Name:Perindopril IMpurity E
- CAS:
- MF:
- Structure:
- Chemical Name:Pitavastatin 3-Oxo SodiuM
- CAS:2245811-12-3
- MF:C25H22FNO4
- Structure:
- Chemical Name:PraMipexole IMp.BI-II828BS
- CAS:
- MF:C20H32N6S2
- Chemical Name:Propofol IMpurity F
- CAS:
- MF:
- Structure:
- Chemical Name:Sertraline IMpurity (SRTRC-3)
- CAS:91797-76-1
- MF:C17H17Cl2N
- Structure:
- Chemical Name:Terbutaline IMpurity B
- CAS:94120-05-5
- MF:C13H19NO3
- Structure:
- Chemical Name:Benzoic acid, 4-[(4-Methyl-1-piperazinyl)Methyl]-3-(trifluoroMethyl)-
- CAS:859282-11-4
- MF:C14H17F3N2O2
- Structure:
- Chemical Name:5-chloro-2,3-diphenylpyrazine
- CAS:41270-66-0
- MF:C16H11ClN2
- Chemical Name:Canagliflozin iMpurity
- CAS:2648347-42-4
- MF:
- Structure:
- Chemical Name:Vortioxetine iMpurity
- CAS:853745-55-8
- MF:C10H14BrClN2
- Structure:
- Chemical Name:PD 312236
- CAS:501666-24-6
- MF:C20H35NO11
- Structure:
- Chemical Name:(17α)-3,3-[1,2-Ethanediylbis(oxy)]-17-hydroxy-19-norpregna-5(10),9(11)-diene-21-nitrile
- CAS:190662-30-7
- MF:C22H29NO3
- Structure:
- Chemical Name:(S)-4-(4-Hydrazinobenzyl)-2-oxazolidinone Hydrochloride
- CAS:139264-57-6
- MF:C10H14ClN3O2
- Structure:
- Chemical Name:1-[4-(4-AMino-6,7-diMethoxy-2-quinazolinyl)-1-piperazinyl]-5-hydroxy-1-pentanone
- CAS:109678-71-9
- MF:C19H27N5O4
- Chemical Name:Perospirone Impurity 26
- CAS:
- MF:
- Chemical Name:Paxlovid Impurity 15
- CAS:
- MF:
- Chemical Name:3-(2-(cyclopent-2-en-1-yl)-2-hydroxy-2-phenylacetoxy)-1,1-dimethylpyrrolidin-1-ium bromide
- CAS:
- MF:
- Chemical Name:Canagliflozin Impurity 84
- CAS:
- MF:
- Chemical Name:Fondaparinux sodium impurity 18
- CAS:
- MF:
- Chemical Name:Fondaparinux sodium impurity 13
- CAS:
- MF:
- Chemical Name:Siponimod Impurity 10
- CAS:
- MF:
- Chemical Name:Lasmiditan Impurity 1
- CAS:
- MF:
- Chemical Name:Olodaterol Impurity 22
- CAS:
- MF:
- Chemical Name:Olodaterol Impurity 25
- CAS:
- MF:
- Structure:
- Chemical Name:Deiodo Trametinib
- CAS:871700-65-1
- MF:C26H24FN5O4
- Chemical Name:32,43,50-Tricarboxy-cyanoco balamin
- CAS:
- MF:
- Structure:
- Chemical Name:(S)-Azelastine
- CAS:143228-85-7
- MF:C22H24ClN3O
- Chemical Name: Relugolix Impurity 92
- CAS:
- MF:
- Structure:
- Chemical Name:N-Desethyl Vardenafil
- CAS:448184-46-1
- MF:C21H28N6O4S
- Structure:
- Chemical Name:O-Desmethyl Gefitinib
- CAS:847949-49-9
- MF:C21H22ClFN4O3
- Structure:
- Chemical Name:Pyrazole N-Demethyl Sildenafil
- CAS:139755-95-6
- MF:C21H28N6O4S
- Structure:
- Chemical Name:S-(-)-Tolterodine
- CAS:124937-53-7
- MF:C22H31NO
- Structure:
- Chemical Name:4-[2-(2-AMino-4,5,6,7-tetrahydro-4,6-dioxo-3H-pyrrolo[2,3-d]pyriMidin-5-yl)ethyl]benzoic Acid
- CAS:193265-47-3
- MF:C15H14N4O4
- Structure:
- Chemical Name:9-(1,3-Dioxolan-2-ylMethyl)-3,9-dihydro-1,3-diMethyl-1H-purine-2,6-dione
- CAS:1174289-18-9
- MF:C11H14N4O4
- Structure:
- Chemical Name:DesMethyl AMisulpride
- CAS:148516-54-5
- MF:C16H25N3O4S
- Structure:
- Chemical Name:DiMethoxy Dienogest
- CAS:102193-41-9
- MF:C22H31NO3
- Structure:
- Chemical Name:Desfluoro Rosuvastatin Sodium Salt
- CAS:847849-66-5
- MF:C22H29N3O6S
- Structure:
- Chemical Name:N-Benzoyl-N-[2-(phenyl)ethyl]-N-carbamic Acid R-Quinuclidinol Ester Succinic Acid Salt
- CAS:1798817-92-1
- MF:C27H32N2O7
- Chemical Name:Tadalafil EP IMpurity A
- CAS:
- MF:
- Structure:
- Chemical Name:(1R,3R,4R)-3-AMino-4-hydroxy-cyclohexanecarboxylic acid ethyl ester
- CAS:1392745-70-8
- MF:C14H25NO5
- Structure:
- Chemical Name:(S)-3-Hydroxypiperidine
- CAS:24211-55-0
- MF:C5H11NO
- Chemical Name:Aprepitant iMpurity B
- CAS:
- MF:
- Structure:
- Chemical Name:Aripiprazole iMpurity 4
- CAS:1424857-63-5
- MF:C36H42Cl2N4O4
- Structure:
- Chemical Name:Aripiprazole iMpurity 4
- CAS:1424857-63-5
- MF:C36H42Cl2N4O4
- Chemical Name:Avanafil IMpurity 8 (R-Avanafil)
- CAS:
- MF:
- Structure:
- Chemical Name:EzetiMibe ring-opening dehydrate iMpurity
- CAS:1292292-63-7
- MF:C24H21F2NO3
- Structure:
- Chemical Name:Fondaparinux sodiuM iMpurity 1
- CAS:348625-84-3
- MF:C13H21NO19S3
- Structure:
- Chemical Name:Pitavastatin IMpurity 4 (PP-4)
- CAS:1422058-54-5
- MF:C25H22FNO3
- Structure:
- Chemical Name:Pregabalin IMpurity
- CAS:159029-27-3
- MF:C7H18N2
- Structure:
- Chemical Name:Valdecoxib 3'-SulfonaMide IMpurity
- CAS:1373038-56-2
- MF:C16H14N2O3S
- Structure:
- Chemical Name:4'-O-2,6-Dideoxy-3-O-Methyl-α-L-arabino-hexopyranosyl SelaMectin
- CAS:301849-46-7
- MF:C50H75NO14
- Structure:
- Chemical Name:(3R,4R)-4-(2,5-Difluorophenyl)-3-Methyl-4-(1H-1,2,4-triazol-1-ylMethyl)-2-oxetanone
- CAS:483340-20-1
- MF:C13H11F2N3O2
- Structure:
- Chemical Name:6,7-DiMethoxy-2-(4-(tetrahydrofuran-2-carbonyl)piperazin-1-yl)quinazolin-4(1H)-one
- CAS:1177261-73-2
- MF:C19H24N4O5
- Structure:
- Chemical Name:2-Hydroxy Atorvastatin Calcium Salt
- CAS:265989-46-6
- MF:C33H37CaFN2O6
- Structure:
- Chemical Name:13-oxo-1,4,7,10-Tetraazabicyclo[8.2.1]tridecane-4,7-diacetic Acid
- CAS:229312-33-8
- MF:C13H22N4O5
- Structure:
- Chemical Name:rac-Clopidogrel Carboxylic Acid Hydrochloride
- CAS:1015247-88-7
- MF:C15H15Cl2NO2S
- Structure:
- Chemical Name:Milnacipran IMpurity
- CAS:810696-16-3
- MF:C11H11NO
- Structure:
- Chemical Name:Terbutaline IMpurity 8
- CAS:28924-20-1
- MF:C26H30BrNO3
- Structure:
- Chemical Name:Etoricoxib IMpurity
- CAS:1350206-14-2
- MF:C18H16N2O2S