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Impurities & Reference Standards

Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

(R)-4-Isobutyl-1-(((2R,3S,4S,5R)-2,3,4,5-tetrahydroxytetrahydro-2H-pyran-2-yl)methyl)pyrrolidin-2-one chemical structure

(R)-4-Isobutyl-1-(((2R,3S,4S,5R)-2,3,4,5-tetrahydroxytetrahydro-2H-pyran-2-yl)methyl)pyrrolidin-2-one

CAS: 501666-22-4
Formula: C₁₄H₂₅NO₆
MW: 303.35 g/mol

VQ-041634

Reference Standard

(R)-4-Methyl-N-((S)-1-(((S)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)-2-((S)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanamide chemical structure

(R)-4-Methyl-N-((S)-1-(((S)-4-methyl-1-((R)-2-methyloxiran-2-yl)-1-oxopentan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)-2-((S)-2-(2-morpholinoacetamido)-4-phenylbutanamido)pentanamide

CAS: 2049025-45-6
Formula: C₄₀H₅₇N₅O₇
MW: 719.9 g/mol

VQ-043596

Reference Standard

(R)-4-Nitrothalidomide chemical structure

(R)-4-Nitrothalidomide

CAS: 202271-81-6
Formula: C₁₃H₉N₃O₆
MW: 303.23 g/mol

VQ-041551

Reference Standard

(R)-4-Propyl-4,5-dihydrofuran-2(3H)-one chemical structure

(R)-4-Propyl-4,5-dihydrofuran-2(3H)-one

CAS: 63095-51-2
Formula: C₇H₁₂O₂
MW: 128.17 g/mol

VQ-021889

Reference Standard

(R)-4,4'-((2-(5-(2-Fluoro-3-methoxyphenyl)-3-(2-fluoro-6-(trifluoromethyl)benzyl)-4-methyl-2,6-dioxo-3,6-dihydropyrimidin-1(2H)-yl)-1-phenylethyl)azanediyl)dibutyric acid chemical structure

(R)-4,4'-((2-(5-(2-Fluoro-3-methoxyphenyl)-3-(2-fluoro-6-(trifluoromethyl)benzyl)-4-methyl-2,6-dioxo-3,6-dihydropyrimidin-1(2H)-yl)-1-phenylethyl)azanediyl)dibutyric acid

CAS: 2409132-60-9
Formula: C₃₆H₃₆F₅N₃O₇
MW: 717.7 g/mol

VQ-021216

Reference Standard

(R)-4,5-Dehydro Pregabalin chemical structure

(R)-4,5-Dehydro Pregabalin

CAS: 1101167-84-3
Formula: C₈H₁₅NO₂
MW: 157.21 g/mol

VQ-041639

Reference Standard

(R)-5-(2-((2-(2-Ethoxyphenoxy)ethyl)amino)propyl)-1-(3-hydroxypropyl)indoline-7-carboxamide chemical structure

(R)-5-(2-((2-(2-Ethoxyphenoxy)ethyl)amino)propyl)-1-(3-hydroxypropyl)indoline-7-carboxamide

CAS: 239463-74-2
Formula: C₂₅H₃₅N₃O₄
MW: 441.6 g/mol

VQ-044019

Reference Standard

(R)-5-(2-((5,6-Diethyl-2,3-dihydro-1H-inden-2-yl)amino)-1-hydroxyethyl)-8-hydroxy-3,4-dihydroquinolin-2(1H)-one chemical structure

(R)-5-(2-((5,6-Diethyl-2,3-dihydro-1H-inden-2-yl)amino)-1-hydroxyethyl)-8-hydroxy-3,4-dihydroquinolin-2(1H)-one

CAS: 1403389-05-8
Formula: C₂₄H₃₀N₂O₃
MW: 394.5 g/mol

VQ-026160

Reference Standard

(R)-5-(2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-hydroxybenzaldehyde chemical structure

(R)-5-(2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-hydroxybenzaldehyde

CAS: 2514696-13-8
Formula: C₂₄H₃₁Cl₂NO₅
MW: 484.4 g/mol

VQ-024009

Reference Standard

(R)-5-(2-(2,5-Difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-amine chemical structure

(R)-5-(2-(2,5-Difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-amine

CAS: 1223404-88-3
Formula: C₁₆H₁₅F₂N₅
MW: 315.32 g/mol

VQ-026371

Reference Standard

(R)-5-(2-(2,5-Difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidine chemical structure

(R)-5-(2-(2,5-Difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidine

CAS: 1223404-89-4
Formula: C₁₆H₁₄F₂N₄
MW: 300.31 g/mol

VQ-037896

Reference Standard

(R)-5-(2-(Benzyl(5,6-diethyl-2,3-dihydro-1H-inden-2-yl)amino)-1-hydroxyethyl)-8-(benzyloxy)quinolin-2(1H)-one chemical structure

(R)-5-(2-(Benzyl(5,6-diethyl-2,3-dihydro-1H-inden-2-yl)amino)-1-hydroxyethyl)-8-(benzyloxy)quinolin-2(1H)-one

CAS: 1384189-12-1
Formula: C₃₈H₄₀N₂O₃
MW: 572.7 g/mol

VQ-037692

Reference Standard

(R)-5-(2-(Benzyl(5,6-diethyl-2,3-dihydro-1H-inden-2-yl)amino)-1-hydroxyethyl)-8-hydroxyquinolin-2(1H)-one chemical structure

(R)-5-(2-(Benzyl(5,6-diethyl-2,3-dihydro-1H-inden-2-yl)amino)-1-hydroxyethyl)-8-hydroxyquinolin-2(1H)-one

CAS: 1534342-47-6
Formula: C₃₁H₃₄N₂O₃
MW: 482.6 g/mol

VQ-037693

Reference Standard

(R)-5-(2-Aminopropyl)-1-(3-hydroxypropyl)indoline-7-carbonitrile chemical structure

(R)-5-(2-Aminopropyl)-1-(3-hydroxypropyl)indoline-7-carbonitrile

CAS: 1401991-17-0
Formula: C₁₅H₂₁N₃O
MW: 259.35 g/mol

VQ-033849

Reference Standard

(R)-5-(2-Benzenesulphonylethenyl)-3-(N-methylpyrrolidin-2-ylmethyl)-1H-indole Hydrobromide chemical structure

(R)-5-(2-Benzenesulphonylethenyl)-3-(N-methylpyrrolidin-2-ylmethyl)-1H-indole Hydrobromide

CAS: 143577-60-0
Formula: C₂₂H₂₅BrN₂O₂S
MW: 461.4 g/mol

VQ-036932

Reference Standard

(R)-5-(2-Fluoro-3-methoxyphenyl)-1-(2-fluoro-6-(trifluoromethyl)benzyl)-3-(2-(hydroxyamino)-2-phenylethyl)-6-methylpyrimidine-2,4(1H,3H)-dione chemical structure

(R)-5-(2-Fluoro-3-methoxyphenyl)-1-(2-fluoro-6-(trifluoromethyl)benzyl)-3-(2-(hydroxyamino)-2-phenylethyl)-6-methylpyrimidine-2,4(1H,3H)-dione

CAS: 2486454-64-0
Formula: C₂₈H₂₄F₅N₃O₄
MW: 561.5 g/mol

VQ-039637

Reference Standard

(R)-5-(2-Fluoro-3-methoxyphenyl)-1-(2-fluoro-6-(trifluoromethyl)benzyl)-6-methyl-3-(2-(2-oxopyrrolidin-1-yl)-2-phenylethyl)pyrimidine-2,4(1H,3H)-dione chemical structure

(R)-5-(2-Fluoro-3-methoxyphenyl)-1-(2-fluoro-6-(trifluoromethyl)benzyl)-6-methyl-3-(2-(2-oxopyrrolidin-1-yl)-2-phenylethyl)pyrimidine-2,4(1H,3H)-dione

CAS: 2248628-93-3
Formula: C₃₂H₂₈F₅N₃O₄
MW: 613.6 g/mol

VQ-028895

Reference Standard

(R)-5-(3-(1-Hydroxy-2,3-dihydro-1H-inden-4-yl)-1,2,4-oxadiazol-5-yl)-2-isopropoxybenzonitrile chemical structure

(R)-5-(3-(1-Hydroxy-2,3-dihydro-1H-inden-4-yl)-1,2,4-oxadiazol-5-yl)-2-isopropoxybenzonitrile

CAS: 1306760-61-1
Formula: C₂₁H₁₉N₃O₃
MW: 361.4 g/mol

VQ-044785

Reference Standard

(R)-5-(Tetrahydrofuran-2-yl)thiazole-4-carboxylic Acid chemical structure

(R)-5-(Tetrahydrofuran-2-yl)thiazole-4-carboxylic Acid

CAS: 613670-77-2
Formula: C₈H₉NO₃S
MW: 199.23 g/mol

VQ-044217

Reference Standard

(R)-5-Bromo-3-(1-(2,6-dichloro-3-fluorophenyl)ethoxy)pyridin-2-amine chemical structure

(R)-5-Bromo-3-(1-(2,6-dichloro-3-fluorophenyl)ethoxy)pyridin-2-amine

CAS: 877399-00-3
Formula: C₁₃H₁₀BrCl₂FN₂O
MW: 380 g/mol

VQ-025094

Reference Standard

(R)-5-Chloro-2-(5-methyl-1,4-diazepan-1-yl) benzo[d]oxazole chemical structure

(R)-5-Chloro-2-(5-methyl-1,4-diazepan-1-yl) benzo[d]oxazole

CAS: 1266975-27-2
Formula: C₁₃H₁₆ClN₃O
MW: 265.74 g/mol

VQ-033999

Reference Standard

(R)-5-Chloro-a-(cyclopropylethynyl)-2-amino-a-(trifluoromethyl) benzenemethanol chemical structure

(R)-5-Chloro-a-(cyclopropylethynyl)-2-amino-a-(trifluoromethyl) benzenemethanol

CAS: 927812-33-7
Formula: C₁₃H₁₁ClF₃NO
MW: 289.68 g/mol

VQ-036896

Reference Standard

(R)-5-Cyclopentylpyrazolidin-3-one chemical structure

(R)-5-Cyclopentylpyrazolidin-3-one

CAS: 2102675-36-3
Formula: C₈H₁₄N₂O
MW: 154.21 g/mol

VQ-042047

Reference Standard

(R)-5-Hydroxymethyl Tolterodine Formate chemical structure

(R)-5-Hydroxymethyl Tolterodine Formate

CAS: 380636-49-7
Formula: C₂₃H₃₃NO₄
MW: 387.5 g/mol

VQ-034330

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