Pharmaceutical Impurity Reference Standards

• Structure
• Product name
• CAS No.
• Molecular formula
• Inquiry

• 
• α-Etoposide
• 100007-53-2
• C₂₉H₃₂O₁₃
• inquiry

• 
• Furo[3',4':6,7]naphtho[2,3-d]-1,3-dioxol-6(5aH)-one,9-[[4,6-O-(1R)-ethylidene-b-D-glucopyranosyl]oxy]-5,8,8a,9-tetrahydro-5-(4-hydroxy-3,5-dimethoxyphenyl)-,(5R,5aS,8aR,9S)-
• 100007-56-5
• C29H32 O13
• inquiry

• 
• 2-(4-((4-chlorophenyl)(phenyl)methyl)piperazin-1-yl)acetic acid dihydrochloride salt
• 1000690-91-4
• C₁₉H₂₁ClN₂O₂*2ClH
• inquiry

• 
• 4-isobutoxy-isophthalic acid
• 100118-38-5
• C₁₂H₁₄O₅
• inquiry

• 
• 3-isobutyl-9,10-dimethoxy-3,4,6,7-tetrahydro-2H-benzo[a]quinolizine-2-one
• 100322-43-8
• C₁₉H₂₅NO₃
• inquiry

• 
• 3-Piperidinemethanol, 4-(4-fluorophenyl)-1-methyl-, (3R,4R)-
• 100332-12-5
• C13H18FNO
• inquiry

• 
• α-phenyl-α-(2-pyridyl-N-oxide)ethanol
• 100393-43-9
• C₁₃H₁₃NO₂
• inquiry

• 
• O-Acetyl Losartan
• 1006062-27-6
• C24H25ClN6O2
• inquiry

• 
• DEHYDROARIPIPRAZOLE, HYDROCHLORIDE
• 1008531-60-9
• C₂₃H₂₅Cl₂N₃O₂*2ClH
• inquiry

• 
• 1'H-2,3'-bipyridinyl-2'-one
• 101002-01-1
• C₁₀H₈N₂O
• inquiry

• 
• 17-alpha,21-dihydroxy-16-alpha-methylpregna-1,4,9(11)-triene-3,20-dione 21-acetate
• 10106-41-9
• C24H30 O5
• inquiry

• 
• 2-Acetyl-3-(3-nitrophenyl)-2-propenoic acid
• 101072-61-1
• C₁₁H₉NO₅
• inquiry

• 
• N-[(1S,2S,4S)-4-(AcetylaMino)-2-hydroxy-5-phenyl-1-(phenylMethyl)pentyl]carbaMic Acid 5-ThiazolylMethyl Ester
• 1010808-43-1
• C25H29N3O4S
• inquiry

• 
• 3-(4-FLUORO-PHENYL)-1-ISOPROPYL-1H-INDOLE-2-CARBALDEHYDE
• 101125-34-2
• C18H16FNO
• inquiry

• 
• Quetiapine IMpurity P (11-(4-Ethylpiperazin-1-yl)dibenzo[b,f][1,4]thiazepine fuMarate))
• 1011758-03-4
• C19H21N3S
• inquiry

• (2S,4R)-5-(Biphenyl-4-yl)-4-[(tert-butoxycarbonyl)amino]-2-methylpentanoic acid
• 1012341-54-6
• C23H29NO4
• inquiry

• (2R,4R)-5-(Biphenyl-4-yl)-4-[(tert-butoxycarbonyl)amino]-2-methylpentanoic acid
• 1012341-56-8
• C23H29NO4
• inquiry

• 
• 4-(4-Fluorophenyl)-1-Methyl-
• 1012886-75-7
• C₁₂H₁₄FN*ClH
• inquiry

• 
• Acarbose D-Fructose IMpurity
• 1013621-79-8
• C51H69NO31
• inquiry

• 
• DesvancosaMinyl VancoMycin
• 101485-50-1
• C59H62Cl2N8O22
• inquiry

• 
• PSI 7411
• 1015073-43-4
• C₁₀H₁₄FN₂O₈P
• inquiry

• 
• rac-Clopidogrel Carboxylic Acid Hydrochloride
• 1015247-88-7
• C₁₅H₁₄ClNO₂S*ClH
• inquiry

• 
• (S)-2-{[(2R,3R,4R,5R)-5-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyltetrahydrofuran-2-ylmethoxy](phenoxy)phosphorylamino}propionic acid methyl ester
• 1015255-46-5
• C₂₀H₂₅FN₃O₉P
• inquiry

• 
• N-Desmethyl Clarithromycin
• 101666-68-6
• C37H67NO13
• inquiry

• 
• Rizatriptan IMpurity B
• 1016900-28-9
• C13H15ClN5
• inquiry

• 
• Clazuril
• 101831-36-1
• C17H10 Cl2 N4 O2
• inquiry

• 
• Pregna-1,4,9(11)-triene-3,20-dione, 17,21-dihydroxy-
• 10184-69-7
• C21H26O4
• inquiry

• 
• {3-[2-(DiMethylaMino)ethyl]-5-[(pyrrolidine-1-yl)sulfonylMethyl]-1H-indol-1-yl}Methanol
• 1018676-02-2
• C18H27N3O3S
• inquiry

• 
• ARISTOLOCHIC ACID SODIUM SALT
• 10190-99-5
• C17H11 N O7 . Na
• inquiry

• 
• 1-(2-ETHOXY-ETHYL)-1,3-DIHYDRO-BENZOIMIDAZOL-2-ONE
• 101953-61-1
• C11H14N2O2
• inquiry

• 
• L-menthyl cis-1,3-oxathiolan-5-chloro-2-carboxylate
• 1020151-61-4
• C₁₄H₂₃ClO₃S
• inquiry

• 
• 1H-Indazole, 4,5-dichloro-
• 1020243-02-0
• C7H4Cl2N2
• inquiry

• 
• 1-NaphthaleneMethanaMine, 7,8-dihydro-α-Methyl-N-[3-[3-(trifluoroMethyl)phenyl]propyl]-, hydrochloride (1:1), (αR)-
• 1020414-33-8
• C₂₂H₂₄F₃N*ClH
• inquiry

• 
• 1,1-BIS-(4-ISOBUTYLPHENYL)ETHANE
• 102120-87-6
• C22H30
• inquiry

• 
• Venlafaxine N-Oxide Impurity
• 1021933-95-8
• C₁₆H₂₅NO₃
• inquiry

• 
• DiMethoxy Dienogest
• 102193-41-9
• C₂₂H₃₁NO₃
• inquiry

• 
• NSC525120
• 10221-08-6
• C8H7Cl3
• inquiry

• 
• 8-HYDROXY MIRTAZAPINE
• 102335-57-9
• C₁₇H₁₉N₃O
• inquiry

• 3,6-Dichloropyrazine-2-carboxaMide
• 1023813-21-9
• C5H3Cl2N3O
• inquiry

• 
• RaceMic Fudosteine HCl
• 1023971-15-4
• C₆H₁₃NO₃S
• inquiry

• 
• (1-ETHYL-3-PIPERIDINYL)METHYLAMINE
• 102459-02-9
• C₈H₁₈N₂
• inquiry

• 
• rac Cinacalcet HCl
• 1025064-33-8
• C22H22F3N
• inquiry

• 
• (Z)-2-(2-Aminothiazol-4-yl)-2-(1-carboxy-1-methyl)ethoxyiminoacetic acid
• 102507-85-7
• C₉H₁₁N₃O₅S
• inquiry

• AztreonaM IMpurity F
• 102579-57-7
• inquiry

• Desulfo Aztreonam
• 102579-59-9
• C13H17N5O5S
• inquiry

• 
• 1-(3-dimethylamino-propyl)-1-phenyl-1,3-dihydro-isobenzofuran-5-carbonitrile
• 1026009-77-7
• C₂₀H₂₂N₂O
• inquiry

• 
• 5-Difluoromethoxy-2-{[(3,4-dimethoxy-2-pyridinyl)methyl]thio}-1H-benzimidazole
• 102625-64-9
• C16H15F2N3O3S
• inquiry

• 
• Telmisartan Related Compound B (15 mg) (4'-[(1,7'-dimethyl-2'-propyl-1H,1'H-2,5'-bibenzo[d]imidazol-1'-yl)methyl]biphenyl-2-carboxylic acid)
• 1026353-20-7
• C33H30N4O2
• inquiry

• (3S)-9,10-difluoro-3-methyl-7-oxo-2,3,6,7-tetrahydro-5H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid
• 1026952-91-9
• C13H11F2NO4
• inquiry

• COAGULATION FACTOR VIIA, HUMAN
• 102786-61-8
• inquiry