Pharmaceutical Impurity Reference Standards

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

• 
• 2-phenyl-1H-pyrrole-4-carbonitrile
• 122453-85-4
• C₁₁H₈N₂
• inquiry

• 
• 4-cyclohexyl-piperazine-1-carboxylic acid tert-butyl ester
• 1224935-95-8
• C₁₅H₂₈N₂O₂
• inquiry

• 
• dimethyl 2-(2-(2-aminopurine-9-yl)ethyl)malonate
• 122497-20-5
• C₁₂H₁₅N₅O₄
• inquiry

• 
• (1S)-3,4-dihydro-1-phenyl-2(1H)-isoquinolinecarboxylic acid-1-azabicyclo[2.2.2]oct-3-yl ester
• 1225338-27-1
• C₂₃H₂₆N₂O₂
• inquiry

• 
• norchlorpromazine
• 1225-64-5
• C16H17 Cl N2 S
• inquiry

• 
• Ibrutinib Impurity 3
• 1226872-27-0
• C25H26N6O4
• inquiry

• 
• 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
• inquiry

• 
• Cinacalcet IMpurity
• 1229224-93-4
• C22H26F3N
• inquiry

• 
• (R)-α-methyl-N-[3-[3-(trifluoromethyl)phenyl]methyl]-1-naphthalenemethaneamine hydrochloride
• 1229225-42-6
• C₂₀H₁₈F₃N*ClH
• inquiry

• 
• 1-NaphthaleneMethanaMine, α-Methyl-N-[[3-(trifluoroMethyl)phenyl]Methyl]-, (αR)-
• 1229512-52-0
• C20H18F3N
• inquiry

• 
• 6-Chloro-3,4-dihydro-4-methyl-3-oxo-2H-1,4-benzoxanine-8-carboxylic acid
• 123040-79-9
• C10H8ClNO4
• inquiry

• 
• Benzenesulfonic acid, 4-methyl-, 2-(dimethylamino)ethyl ester
• 123091-15-6
• C11H17NO3S
• inquiry

• 
• Decarboxyl Ofloxacin
• 123155-82-8
• C₁₇H₂₀FN₃O₂
• inquiry

• 
• cis-(4R,6S)-2,2-dimethyl-6-formyl-1,3-dioxane-4-acetic acid
• 123185-91-1
• C₉H₁₄O₅
• inquiry

• Cetirizine 3-Chloro Impurity
• 1232460-31-9
• inquiry

• Sofosbuvir metabolites GS566500
• 1233335-78-8
• C13H19FN3O9P
• inquiry

• 
• (2E)-3-(Dimethylamino)-1-(3-pyridyl)prop-2-en-1-one
• 123367-26-0
• C₁₀H₁₂N₂O
• inquiry

• 
• Methyl 3-acetamido-4-(2,4,5-trifluorophenyl)but-2-enoate
• 1234321-81-3
• C13H12F3NO3
• inquiry

• Δ2-Cefuroxime Axetil
• 123458-61-7
• C20H22N4O10S
• inquiry

• 
• 1H-Pyrazole-1-propanenitrile, β-cyclopentyl-4-[7-(hydroxyMethyl)-7H-pyrrolo[2,3-d]pyriMidin-4-yl]-,(βR)-
• 1236033-03-6
• C₁₈H₂₀N₆O
• inquiry

• 
• Levomepromazine hydrochloride
• 1236-99-3
• C19H24N2OS^.HCl
• inquiry

• 
• (Z)-N-(2-nitrovinyl)acetaMide
• 1238305-24-2
• C4H6N2O3
• inquiry

• 
• 3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-, mono[(2E)-3-phenyl-2-propenyl] ester
• 123853-41-8
• C24H22N2O6
• inquiry

• 
• 2-[3-Carboxy-4-(2-Methylpropoxy)phenyl]-4-Methyl-5-thiazolecarboxylic Acid
• 1239233-87-4
• C16H17NO5S
• inquiry

• 
• TOPOTECANACETATE
• 123948-88-9
• C23H23N3O5^.C2H4O2
• inquiry

• 
• 4-(5-CHLORO-2-THIENYL)-1,3-THIAZOL-2-AMINE
• 123971-45-9
• C7H5ClN2S2
• inquiry

• 
• 3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-, mono[2-[methyl(phenylmethyl)amino]ethyl] ester
• 123973-71-7
• C25H27N3O6
• inquiry

• 
• 2-[1-(3,5-bis-trifluoro-methylphenyl)ethoxy]-3-(4-fluorophenyl)morpholine
• 1242175-36-5
• C₂₀H₁₈F₇NO₂
• inquiry

• 
• (2S,3S)-2-[(1S)-1-(3,5-bis-trifluoro-methylphenyl)ethoxy]-3-(4-fluorophenyl)morpholine
• 1242175-38-7
• C₂₀H₁₈F₇NO₂
• inquiry

• 
• Aprepitant
• 1242175-40-1
• C₂₃H₂₁F₇N₄O₃
• inquiry

• (3S,5R)-Rosuvastatin
• 1242184-42-4
• C22H28FN3O6S
• inquiry

• 4,5-Dihydro-a-(hydroxymethyl)-a,3-dimethyl-5-oxo-1-phenyl-1H-pyrazole-4-methanesulfonic acid
• 1242471-40-4
• C13H16N2O5S
• inquiry

• 
• Octyl Orlistat
• 1243011-56-4
• C31H57NO5
• inquiry

• 
• 4-(3,4-Dichloro-phenyl)-3,4-dihydro-2H-naphthalen-1-one
• 124379-29-9
• C16H12Cl2O
• inquiry

• 
• C₁₅H₂₄N₅O₈P
• 1244022-55-6
• C₁₅H₂₄N₅O₈P
• inquiry

• 
• Mono-POC Tenofovir 6-Isopropyl CarbaMate (Mixture of DiastereoMers)
• 1244022-56-7
• C18H28N5O9P
• inquiry

• 
• 16-hydroxyclarithromycin
• 124412-58-4
• C38H69 N O14
• inquiry

• 
• 2-chloro-4-(cyclopentylamino)-5-pyrimidinyl ethanone
• 1244949-62-9
• C₁₁H₁₄ClN₃O
• inquiry

• 
• 2-(4-(6-((5-((2-chloro-6-Methylphenyl)carbaMoyl)thiazol-2-yl)aMino)-2-MethylpyriMidin-4-yl)piperazin-1-yl)ethyl acetate
• 1245157-85-0
• C24H28ClN7O3S
• inquiry

• 
• (2E)-N-[4-(3-chloro-4-fluoroanilino)-7-methoxy-6-quinazolinyl]-4-(dimethylamino)-2-butenamide
• 1245555-42-3
• C₂₁H₂₁ClFN₅O₂
• inquiry

• 
• 2-[[6-[(3R)-3-tert-butoxycarbonylamino-1-piperidinyl]-3,4-dihydro-2,4-dioxo-3-methyl-1(2H)-pyrimidinyl]methyl]benzonitrile
• 1246610-74-1
• C₂₃H₂₉N₅O₄
• inquiry

• Tenofovir Fumarate
• 1246812-23-6
• inquiry

• (((((1-(6-aMino-9H-purin-9-yl)propan-2-yl)oxy)Methyl)phosphoryl)bis(oxy))bis(Methylene) isopropyl Methyl dicarbonate
• 1246812-43-0
• C18H28N5O10P
• inquiry

• 
• α,α-Bis[2-(dimethylamino)ethyl]-
• 1246816-57-8
• C16H24ClN3
• inquiry

• 
• Nilotinib N-Oxide
• 1246817-85-5
• C₂₈H₂₂F₃N₇O₂
• inquiry

• 
• Atorvastatin Oxirane Impurity
• 1246818-88-1
• C26H24FNO3
• inquiry

• 
• N-Isopropyl Carvedilol
• 1246819-01-1
• C27H31N2O4
• inquiry

• 
• 1-Methyl-12-thioxopyrido[1,2,3,4]imidazole-[1,2-a]benzimidazole-2(12H)-one
• 1246819-06-6
• C14H9N3OS
• inquiry

• 
• 3-Bromo Carbidopa
• 1246819-09-9
• C10H13BrN2O4
• inquiry

• 
• 6,7,8,9-Tetrahydro Carvedilol
• 1246820-73-4
• C48H58N4O8
• inquiry